Monday, October 3
QNC 0101
| 9:00 am | Opening remarks by IQC Director Norbert Lütkenhaus |
|---|---|
| Climbing in complexity | |
| 9:15 am | |
| 9:50 am |
Emily Davis, University of California, Berkeley Towards spin-squeezing in two-dimensional ensembles of solid-state defects |
| 10:25 am | Coffee break |
| 10:50 am |
Agustin Di Paolo, Massachusetts Institute of Technology Extensible circuit QED architecture based on frequency-modulated microwaves |
| 11:25 am |
Eleanor Crane, Joint Quantum Institute Simulating gauge theories in 1+1d with bosonic quantum circuits |
| 12:00 pm | Lunch |
| Adventures in academia | |
| 1:30 pm |
Hadiseh Alaeian, Purdue University From Dipolar to Rydberg Photonics: Harnessing Cooperative Effects for Quantum Technologies |
| 2:30 pm | Coffee break |
| 2:50 pm | Panel discussion on career in academia |
| 4:00 pm | Quantum Innovators speakers and IQC faculty members are invited to a private reception in QNC 2101 |
Tuesday, October 4
RAC 2009
| 9:00 am | Remarks by David Cory, Principal Investigator of Transformative Quantum Technologies |
|---|---|
| Materials, devices, and interfaces | |
| 9:10 am |
Lin Tian, Institute for Quantum Computing Towards an all-electric single photon emitter with Set-reset gating protocols |
| 9:45 am | |
| 10:20 am | Coffee break |
| 10:45 am |
David Northeast, National Research Council Canada Approaching transform-limited single photon line widths with nanowire quantum dot emitters |
| 11:20 am | |
| 11:55 am | Lunch |
| Programmable prototypes | |
| 1:20 pm |
Programmable interactions between spins and bosons in trapped ion systems |
| 1:55 pm | |
| 2:55 pm | Coffee break |
| 3:15 pm | RAC1 and RAC2 tours |
| 5:30 pm | Dinner |
Wednesday, October 5
QNC 0101
| 9:00 am | QNC lab tours |
|---|---|
| 12:00 pm | Lunch |
| Savouring stochasticity | |
| 1:00 pm | |
| 1:35 pm |
Emine Altuntas, The Joint Quantum Institute The Impact of Stochastic Wavefunction Evolution in Dispersively Measured Bose-Einstein Condensates |
| 2:10 pm | Coffee break |
| Lure of government labs | |
| 2:30 pm | |
|
3:05 pm |
|
| 4:05 pm | Closing remarks |
Hadiseh Alaeian, Purdue University
From Dipolar to Rydberg Photonics: Harnessing Cooperative Effects for Quantum Technologies
Elmore Family School of Electrical & Computer Engineering, Department of Physics & Astronomy, Purdue Quantum Science & Engineering Institute, Purdue University, West Lafayette, IN 47907, USA
Strong light-induced interactions between atoms are known to cause nonlinearities at a few-photon level which are crucial for applications in quantum information processing. At densities higher than 1 atom per cubic wavelength, such interactions give rise to density shifts and broadenings, and when confined to less than a wavelength size, such dipolar interaction leads to collective blockade phenomena, which mostly have been studied in the context of strongly interacting Rydberg states.
Here we study these phenomena for low-lying excited atomic states confined in thin atomic clouds that are generated via the pulsed Light-Induced Atomic Desorption (LIAD) technique [1]. For the first few nanoseconds, the transient light-induced dipolar interaction of the low-lying lines of Rubidium leads to shifts and broadenings well beyond the well-known Lorentz-Lorenz limit. In the second experiment, we combine the high densities achievable in thermal atomic vapors with an efficient coupling to a slot waveguide [2]. In contrast to free-space interactions, atoms aligned within the slot exhibit repulsive interactions that are further enhanced by a factor of 8 due to the Purcell effect. The corresponding blueshift of the transition frequency of atoms arranged in the essentially one-dimensional geometry vanishes above the saturation, providing a controllable nonlinearity at the few-photon level.
Towards the end of my talk, I will introduce our novel platform in thin-film cuprous oxide, which allows us to realize strongly interacting Rydberg excitons in a solid-state system that is inherently suitable for scalability and integration. The results of these studies pave the way towards a robust scalable platform for quantum nonlinear chiral optics [3] and all -optical quantum information processing in an integrable and scalable platform, and potentially at elevated temperatures.
References
[1] F. Christaller et al., “Transient dipolar interactions in a thin vapor cell,” Phys. Rev. Lett.128, 173401 (2022)
[2] Skljarow et al., “Purcell-enhanced dipolar interaction in nanostructures,” Phys. Rev. Research4, 023073 (2022)
[3] C. M. Patil et al., “Observation of slow light in glide-symmetric photonic-crystal waveguides,” Opt. Express30, 12565 (2022)
Emine Altuntas, The Joint Quantum Institute
The Impact of Stochastic Wavefunction Evolution in Dispersively Measured Bose-Einstein Condensates
A fundamental tenet of quantum mechanics is that measurements change a system’s wavefunction to that most consistent with the measurement outcome, even if no observer is present. Weak measurements—termed partial or non-destructive in different settings—produce only limited information about the system,and as a result only minimally change the system’s state. We theoretically and experimentally characterize quantum back-action in atomic Bose-Einstein condensates (BECs), weakly measured by the light scattered from a far-from resonant, i.e., dispersivly interacting, probe laser beam. We theoretically describe this process using a quantum trajectories approach and present a measurement model based on an ideal photode-tection mechanism. We experimentally quantify the resulting wavefunction change with three observations:the change in total atom number, the contrast of a Ramsey interferometer, and the deposited energy. The ob-served back-action is in good agreement with our measurement model, enabling true quantum back-actionlimited measurements of BECs.
Scott Beattie, National Research Council Canada
Sixteen digits of precision and beyond: frequency and time metrology at the National Research Council Canada
Global needs for accurate time continue to increase for numerous uses such as synchronization and automation, energy grids, smart cities, financial markets, fundamental research, and global positioning and navigation.In the 1950s,the accuracy of atomic clocks surpassed timekeeping based on astronomical observations,and currently the SI second can be most accurately realized by atomic fountain clocks. These clocks use atomic interferometry to measure frequencies with an accuracy reaching 1 part in 1016.At the National Research Council Canada(NRC), we develop and maintain several atomic clocks to provide Canadians with stable and accurate official time.I will discuss the development and performance of the atomic clocks at the NRC, particularly the caesium fountain clock primary frequency standard.
Alexei Bylinskii, QuEra Computing Inc.
Aquila: a field-programmable atom array on the cloud
Neutral atom arrays, trapped and arranged using optical tweezers and interacting with each other when excited to Rydberg states, constitute a rapidly evolving platform for quantum simulation and quantum computation. QuEra Inc. presents Aquila: a 256-qubit cloud-accessible machine, with a connectivity that is programmable by the user via their arrangement in 2D, enabling the encoding of problems ranging from quantum simulation to combinatorial optimization. A global drive to the Rydberg state is also programmable, lending itself to a variety of protocols ranging from collective gate pulses to adiabatic state preparation. Finally, a programmable pattern of local detunings of the Rydberg drive offers a degree of individual addressability for state preparation and optimization over weighted graphs. The field-programmable nature of the Aquila platform makes it a very versatile platform for NISQ-era applications, as well as a versatile testbed for developments towards a fully-controllable neutral atom quantum computer.
Eleanor Crane, Joint Quantum Institute
Simulating gauge theories in 1+1d with bosonic quantum circuits
Qubit-based quantum simulations of lattice gauge theories have so far resorted to either integrating out the gauge fields which is only exact in 1+1D, or truncating the gauge fields to two-level systems which drastically alters the behavior of the model. However, recent progress in the control of long-lived bosonic qubits, which naturally host a large dimensional Hilbert space, points the way to efficientsimulation of lattice gauge theories. We demonstrate the reduction in complexity compared to qubit-only implementations and theoretically calculate the fidelity of experimentally preparing the ground state of the 1+1D Z2 and Schwinger models, obtained using VQE. These results lay the foundations for the study of lattice gauge theories in higher dimensions.
Ioana Craiciu, Jet Propulsion Laboratory
High speed detection of telecommunications wavelength single photons with the PEACOQ superconducting nanowire detector
Co-authors: Boris Korzh1, Andrew D. Beyer1, Andrew Mueller1,2, Jason P. Allmaras1, Lautaro Narvaez2, Bruce Bumble1, Emma Wollman1, Matthew D. Shaw1
Affiliations:
1. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr, Pasadena, California 91109, USA
2. Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
Superconducting Nanowires Single Photon Detectors (SNSPDs) have been an enabling technology for quantum communication experiments, tests of local realism and quantum information demonstrations including large-scale Boson sampling. In addition to high detection efficiency, SNSPDs have low dark count rates, short dead times, and high timing resolution, though often not all at the same time.The PEACOQ is a fiber-coupled detector designed to measure single 1550 nm photons at high count rates with high efficiency and low timing jitter.
The PEACOQ comprises a linear array of 32 straight superconducting niobium nitride nanowires that spans a single SMF28 optical fiber mode. The array has a peak efficiency of 80% and measures at count rates of up to 1.5 giga-counts per second (3 dB point) with a timing jitter of less than 100 ps FWHM. A time-walk correction scheme is used to ensure low jitter at high count rates. The photon-number-resolving capability of the array is discussed.
Emily Davis, University of California, Berkeley
Towards spin-squeezing in two-dimensional ensembles of solid-state defects
Generating spin-squeezed states in quantum simulators with power-law interactions is a key experimental challenge with limited theoretical guidance. While numerical evidence suggests it should be possible to achieve spin squeezing with sufficiently long-range (but still energetically extensive) XXZ Hamiltonians, the precise requirements remain unclear. We conjecture an explanation for the "squeezing phase diagram" of long-range XXZ models. While squeezing in such models is dynamically generated by time evolution from simple product states, our explanation is intimately connected to the presence of finite-temperature equilibrium order in the Hamiltonian. Using a variety of numerical methods, we test our conjecture in one-dimensional models and find necessary and sufficient conditions for spin squeezing. We discuss the implications of these conditions for realizing spin-squeezing in a two-dimensional ensemble of solid-state defects coupled via magnetic dipole-dipole interactions.
Agustin Di Paolo, Massachusetts Institute of Technology
Extensible circuit QED architecture based on frequency-modulated microwaves
Superconducting quantum architectures come in variations meant to address design trade-offs with different priorities in mind. Thus, there is a common consensus that no winner in architecture has already been found, and the design space for superconducting platforms remains open to new ideas. This talk presents a superconducting-qubit architecture that uses frequency-modulated microwave tones for two-qubit gates and error suppression. Frequency modulation is a form of microwave control that remains largely unexplored in circuit QED and is, therefore, less intuitive than drive-amplitude modulation. We show that frequency modulation offers unique possibilities for quantum control, motivating the search for a framework to design frequency-variable drives and interactions. We present a Floquet-theory toolkit that facilitates working with frequency-modulated microwave tones and that we use to engineer high-fidelityt wo-qubit gates. Our superconducting architecture considers two fixed-frequency trans monqubits coupled by a weakly-tunable coupler. The talk follows our recent preprint available atarXiv:2204.08098.
Ivana Dimitrova, Harvard University
Towards a photonic interface for Rydberg atom arrays
Rydberg atom arrays are a promising platform for quantum information and quantum computation. However, they lack an interface for coupling to optical photons, such as an optical cavity. Such an interface could be used for quantum networking and for remote entanglement of distant arrays, thus extending the computational capabilities of the platform. Nevertheless, the integration between an optical cavity and Rydberg atoms is challenging because of the large polarizability of Rydberg atoms.Electric field noise from surface charges on the cavity could severely limit qubit coherence times. Here we study the coherence properties of single-and two-atom Rydberg states as a function of distance from a nanoscale photonic crystal cavity and suggest a pathway towards their successful integration.
Or Katz, Duke University
Programmable interactions between spins and bosons in trapped ion systems
We present new techniques to realize quantum gates and simulations using ion-phonon interactions. We describe a single-step protocol to generate N-body entangling interactions between trapped atomic ion qubits using spin-dependent squeezing, and demonstrate a variety of quantum gates, simulations and algorithms using a reconfigurable trapped-ion processor. We also outline a scheme to program a dense graph of couplings between the phonon modes in trapped-ion crystals, with applications to quantum simulations of bosonic systems
David Northeast, National Research Council Canada
Approaching transform-limited single photon line widths with nanowire quantum dot emitters
David B. Northeast, Edith Yueng, Patrick Laferri`ere, Khaled, Mnaymneh, Sofiane Haffouz, PhilipPoole, Robin Williams, and Dan DalacuNational Research Council Canada, Ottawa, Canada
Quantum interference between indistinguishable single photons lies at the heart of many promising quantum technologies. On-demand generation of such photons has been demonstrated using solid-state two-level emitters and in particular, epitaxial semiconductor quantum dots. Hybrid integration of such dots into on-chip photonic circuitry can provide a basis for stable operation and device scalability. In this talk, I will discuss NRC’s work toward combining nanowire-based quantum dots onto silicon nitride integrated optical circuits. With measured coupling efficiencies of upto94%, we achieve single photon purities>99% and two-photon interference visibilities around20% (>90% post-selected) with quasi-resonant pumping. We study the emission line widths in an attempt to determine the decoherence mechanisms at play. Measured line widths are∼4.5timesthat of the Fourier-limit and have Lorentzian lineshapes, suggesting that pure dephasing, rather than spectral wandering, is responsible for the excess broadening.
Erhan Saglamyurek, Lawrence Berkeley National Lab
Engineering light-matter interfaces for quantum networks
A future quantum Internet relies on processing and storage of quantum information at local nodes and interconnecting distant nodes using photons. Light-matter quantum interfaces constitute building blocks for such networks, allowing the distribution of quantum entanglement over long distances, but their practical development faces a lot of challenges. In my talk, I will address these challenges and discuss our experimental efforts towards overcoming them. In the first part, I will present our atom-based optical quantum memories, developed in Alberta over the past 15 years, using rare-earth ion doped solids [1,2], laser-cooled atoms [3], and a Bose-Einstein condensate [4]. In the second part, I will talk about our ongoing efforts to realize a quantum network test-bed at Berkeley with novel light-matter platforms, including a cavity integrated trapped-ion quantum processor and a color-center based single-photon source. I will conclude my talk with a brief discussion of our planned experiments towards distributed quantum computing.
1. E. Saglamyurek et al. Nature 469, 512-515, (2011).
2. E. Saglamyurek et al. Nature Photonics 9, 83-87 (2015).
3. E. Saglamyurek et al. Nature Photonics 12, 774-782 (2018).
4. E. Saglamyurek et al. New Journal of Physics 23, 043028 (2021).
Lin Tian, Institute for Quatum Computing
Towards an all-electric single photon emitter with Set-reset gating protocols
L. Tian*, F. Sfigakis, A. Shetty, H. S. Kim, N. Sherlekar, S. Hosseini, M. C. Tam, B. van Kasteren, B. Buonacorsi, Z. R. Wasilewski, J. Baugh and M. E Reimer
Institute for Quantum Computing, University of Waterloo, Waterloo, Canada N2L 3G1 * lin.tian.1@uwaterloo.ca
We propose a novel design of all-electric single photon emitter with a single electron pump and a lateral p-n junction based on AlGaAs/GaAs heterostructure. The promise of single photon emission is achieved by injecting one and only one electron into the p-n junction, where one photon will be generated after e-h radiative recombination. This ensures an intrinsically on-demand and deterministic single photon source. Up to GHz repetition rate is expected as the single electron pump has showed quantized generation of electrons in the GHz range [1].
The so-called dopant-free lateral p-n junction is formed by gate-induced carriers in a two-dimensional electron gas (2DEG) and a two-dimensional hole gas (2DHG) in purely intrinsic materials. Earlier work on lateral p-n junction relied either on modulation doping and/or selective etching [2][3][4]. The former pre-determines the carrier type and density at a fixed level and risks parallel conduction at very high doping levels. The latter, however, introduces non-radiative centres due to etching, which inevitably lowers the emission efficiency. We will show switchable carrier types and tunable carrier densities in our device with engineered ambipolar design.
Another obstacle with lateral p-n junction is the unwanted charge accumulation in the intrinsic p-n junction which kills radiative recombination shortly after turning on. The operation has to be interrupted for a full thermal cycle from cryogenic to room temperature, and resumed after a new cool-down process [5]. In this work, we will present an in-situ set-reset gating protocol to restore light emission. Promising electro-luminescence signals will be presented in an analogous design where the single electron pump is not yet included.
This research was undertaken thanks in part to funding from the Canada First Research Excellence Fund (Transformative Quantum Technologies), Defence Research and Development Canada (DRDC), and Canada’s Natural Sciences and Engineering Research Council (NSERC).
Reference:
[1] B. Buonacorsi, et al., Appl. Phys. Lett. 119, 114001 (2021).
[2] B. Kaestner, et al., Microelectronic Engineering 67-68, 797 (2003).
[3] M. Cecchini, et al., Appl. Phys. Lett. 82, 636 (2003).
[4] J. R. Gell, et al., Appl. Phys. Rev. Lett. 89, 243505 (2006). [5] T. K. Hsiao, et al., Nat Commun 11, 917 (2020).
Rahul Trivedi, University of Washington
Impact of errors on near-term quantum hardware
Joint work with J. Ignacio Cirac, A. Franco Rubio, G. Gonzalez, S. D. Mishra, M. Frias
Near-term quantum devices are rapidly reaching a regime, both in number of qubits as well as in fidelities, where they are hard to simulate efficiently on classical computers. However, implementing error correction and fault tolerance still remains a major challenge. From a theoretical standpoint, this opens up the question of precisely understanding both the strengths and limitations of unencoded noisy quantum computations.
I will first consider the circuit model of quantum computations, with the goal of the quantum circuit being to solve a classical optimization problem. I will consider the problem of providing bounds on the optima attainable by such a quantum circuit in the presence of a constant noise rate. I will present
- A random circuit model that allows us to analytically obtain such a bound for a typical circuit, and captures propagation of errors through the circuit, and
- A Lagrangian dual-based classical algorithm to compute a certifiable lower bound for any specific circuit.
Both analytical and numerical results obtained here suggest that the rapid propagation of errors through typical unencoded quantum circuits most likely makes them unsuitable for solving classical optimization problems.
In the next part of my talk, I will show that for certain many-body physics problems, un encoded quantum computations or analogue quantum simulators could be practical. I will first offer a definition of the class of problems that can be solved without error correction. I will then argue,based on technical results that already exist in quantum information and many-body literature,that for spatially local Hamiltonians, the problem of measuring local observables for (a) constant time dynamics, (b) locally topologically ordered ground states of gapped, frustration-free models and (c) finite-temperature gibbs state with localized correlations are solvable without error correction. Furthermore, for spatially-local free fermion models, I will present two new technical results, for dynamics and ground states, which show that just the assumption of translational invariance in the target Hamiltonian and the observable guarantees its solvability with uneconded quantum computations.
Ramona Wolf, ETH Zürich
True randomness from quantum physics
Randomness is a regular part of our (more or less) daily lives: from drawing lottery numbers to running computer simulations and the security of cryptographic schemes, various applications rely on random numbers. But does true randomness actually exist? If so, can we create truly random numbers in our labs? This task proposes many challenges, already on a fundamental theoretical level. In this talk, I will discuss what is necessary to realize quantum random number generators, starting with how to properly define randomness (which is a surprisingly nontrivial task!) up to explaining how to design protocols for experimentally generating truly random numbers.
Participants
Hadiseh Alaeian, Purdue University
Hadiseh Alaeian got her Ph.D. in Electrical Engineering and Physics from Stanford University in 2015. After her graduation, she moved to the University of Bonn in Germany as a Humboldt postdoctoral fellow in 2016. During 2017-2020 she was a group leader in the Integrated Quantum Science and Technology Center at Max Planck Institute of solid-state systems and the University of Stuttgart, Germany. Her interdisciplinary research interest is at the interface of atomic physics and Nano-photonics. Since August 2020 she is the PI of the Quantum Nano-Photonics (QNP) lab at Purdue University, where she aims to combine the interesting features of Rydberg atoms and excitons with the controllable electromagnetic fields of Nano-photonic circuits to engineer atom-atom and photon-photon interactions in a unique and powerful scheme. Hadiseh is the recipient of the silver medal from the Materials research society of America in 2015 for her Ph.D. thesis, and the early researcher award from the Baden-Württemberg Foundation, Germany in 2018 and 2019.
Emine Altuntas, The Joint Quantum Institute
Emine Altuntas is a postdoctoral researcher at the National Institute of Standards and Technology (NIST), Gaithersburg and the Joint Quantum Institute in Dr. Ian Spielman’s group.
She attended Amherst College for her undergraduate studies as she was destined to major in physics and simultaneously desired to explore humanities and social sciences. Subsequently she received her B.A. in physics and political science in 2011. For her undergraduate physics thesis, she studied the real-time dynamics of co-rotating vortices in Bose-Einstein condensates (BECs) using partial transfer absorption imaging technique under the guidance of Prof. David Hall. At Amherst College, she also got an initial taste of precision measurements using atomic physics techniques working in Prof. Larry Hunter’s lab, which focused on electron electric dipole moment measurements.
For her Ph.D. she attended Yale University and joined Prof. David DeMille’s group as she has been captivated by the use of table-top experiments as probes for fundamental physics searches. She studied atomic parity violation effects in diatomic molecules to characterize strong-force induced modifications of electroweak interactions. Her graduate thesis demonstrated the measurement of nuclear spin dependent parity violation effects in 138Ba19F with a sensitivity surpassing that of any previous atomic parity violation measurement. She received her Ph.D. in 2017.
For her postdoctoral work, she decided to delve back into the land of BECs. Towards this goal, she joined Dr. Ian Spielman’s group at NIST and decided to work on a new venture: realization of open quantum systems with BECs. As the first step, she designed and built a new ultracold atom microscope for high precision measurements of BECs. Recently, she completed the characterization of measurement back-action using Ramsey interferometry and measurement-induced heating. Her current research focuses on the direct observation of quantum back-action via repeated weak measurements of the same BEC.
Her research interests include precision measurements of violations of discrete spacetime symmetries using atomic systems, and quantum measurement and quantum control with ultracold neutral atoms.
Scott Beattie, National Research Council Canada
Dr. Scott Beattie obtained his BSc (2002) from Dalhousie University and his PhD (2009) in experimental physics from York University for precision measurements using atom interferometry. Dr. Beattie worked as a postdoctoral researcher at the University of Cambridge from 2009-2012, where he studied the superfluid properties of Bose-Einstein condensates. From 2012 - 2014, his research moved to Fermionic quantum gases during a second postdoc at the University of Toronto. In 2014, Dr. Beattie joined the Frequency and Time team in the Metrology Research Centre at the NRC. Here, Dr. Beattie led efforts to develop and evaluate a caesium fountain clock, which is now serving as one of the most accurate and reliable contributors to International Atomic Time, and is being used to steer Canada’s official time. Since 2020, Dr. Beattie has also served as an adjunct professor in the Department of Physics and Astronomy at York University.
Alexei Bylinskii, QuEra Computing Inc.
Alexei Bylinskii is a senior research scientist at QuEra and project lead for Aquila–QuEra’s first quantum computer and its first product. Alexei completed his PhDat MIT in 2015,as an experimental atomic physicist in the group of Vladan Vuletic, where he built a machine combining trapped ions and a high-finesse optical cavity and used it to simulate models of nanoscale friction.After his PhD, Alexei took an interdisciplinary postdoctoral position between the departments of Physics and Chemistry at Harvard (groups of Misha Lukin and Hongkun Park), leading aresearch thrust into quantum sensing with spin defects in diamond (NV centers) interfaced with microscale and nanoscale chemical and biological systems, with an emphasis on spatial imaging.In 2019, Alexei joined QuEra Computing Inc. as one of its first hires, and helped build its technical team and develop Aquila, a field-programmable atom array for near-term applications in combinatorial optimization and in quantum simulation.
Eleanor Crane, Joint Quantum Institute
Eleanor Crane is a post-doc investigating quantum simulation in circuit QED and trapped ions at QuICS and JQI. She also works at the NIST figuring out how donors in silicon can become a complementary approach to more established platforms in quantum simulation. She works part-time for Quantinuum on implementing quantum simulation in digital quantum computers. She received her PhD from University College London with Prof. Fisher working both theoretically and experimentally on donors in silicon, where she also worked for IBM and made an exchange in the group of Prof Girvin at Yale developing a quantum computer software development kit for bosonic circuits and working on the simulation of lattice gauge theories in circuit QED. She grew up in a superposition of England and France and continues to enjoy discovering other cultures and always enjoys an adventure, whatever the nature
Ioana Craiciu, Jet Propulsion Laboratory
Ioana Craiciu was born in Romania and raised in Canada. She completed the Nanotechnology Engineering undergraduate program at the University of Waterloo, and received her PhD from Caltech with a dissertation on erbium-ion based quantum memories for light. She is currently a Postdoctoral Scholar at the Jet Propulsion Lab in Pasadena CA, where she is working on optimizing superconducting nanowire single photon detectors for high count rate applications.
Emily Davis, University of California, Berkeley
I am a Miller fellow hosted by Prof. Norman Yao at UC Berkeley, where I study many-body physics and magnetometry using nitrogen vacancy centers in diamond. I received my PhD from Stanford, where I worked in the group of Prof. Monika Schleier-Smith and built a cavity QED experiment to study nonlocal spin dynamics.
Ivana Dimitrova, Harvard University
Ivana Dimitrova is a postdoc in the Lukin group at Harvard University. She earned her B.A. from Princeton University in 2010 and her PhD from MIT in 2019. At MIT she worked in the group of Wolfgang Ketterle on quantum simulation of spin models with ultracold bosoms (7Li) in optical lattices. She is currently exploring the integration of optical cavities with Rydberg atom arrays in order to scale and expand the capabilities of Rydberg quantum processors to quantum networking and distributed quantum computing. More broadly, her research interests include quantum simulation and quantum computation with neutral atoms, spin dynamics and transport, many-body quantum states, quantum networks, hybrid quantum systems.
Agustin Di Paolo, Massachusetts Institute of Technology
Agustin Di Paolo received his Ph.D. in 2019 from Université de Sherbrooke. During his Ph.D. in the group of Alexandre Blais, Agustin worked on noise-protected superconducting qubits, quantum algorithms, and numerical methods for modeling large-scale superconducting circuits. After a short post-doc in Sherbrooke, Agustin joined the Engineering Quantum System (EQuS) group led by Will Oliver at MIT. As a postdoctoral associate at EQuS, Agustin covers many of the group’s theory needs, including work on novel qubit designs, characterization of quantum devices and noise, and engineering multi-qubit chips.
Or Katz, Duke University
Or Katz is a postdoctoral associate at Christopher Monroe’s trapped-ion group at Duke University. Or received his PhD with honors at the Weizmann Institute of Science, researching light-matter interactions using atomic ensembles of alkali-metal and noble gas spins. He has ten years of experience as a researcher in the Israeli industry, and has conducted additional interdisciplinary research on systems of ultracold atoms and ions, twisted bilayer graphene and search of new physics using precision measurements. His current research focuses on quantum simulations and computation using systems of trapped ions.
David Northeast, National Research Council Canada
David Northeast joined the Quantum Physics group at the National Research Council (NRC) Canada as a research associate in 2018. His work at NRC has included the study of photoluminescence and emission properties of semiconductor quantum dots, and their use as single photon sources for quantum information applications. Current work is motivated by the desire to create hybrid quantum optical systems using silicon nitride and silicon photonics.
Erhan Saglamyurek, Lawrence Berkeley National Lab
Dr. Erhan Saglamyurek started his career in quantum technologies in 2005 with a technical-assistant position in Prof. A. Zeilinger’s group at the University of Vienna. From 2007 to 2013, he completed his PhD studies at the University of Calgary under the supervision of Prof. W. Tittel with specialization on solid-state quantum memories for long-distance quantum communication. Then, he stayed in this group as a postdoc for 2.5 years to develop telecom-wavelength light-matter interfaces for fiber-based quantum networks.
In 2015, he joined the ultracold quantum gases laboratory led by Prof. L. LeBlanc at the University of Alberta, and helped building the lab and performing quantum optics experiments with cold atoms and Bose-Einstein condensates. Between 2020 and 2022, Dr Saglamyurek was a senior research associate with a joint appointment at the Universities of Calgary & Alberta, and worked with the groups of Profs D. Oblak, S. Barzanjeh and L. LeBlanc on various quantum technologies.
In July 2022, he joined Berkeley National Lab as a project scientist. In this position, his role is to coordinate the realization of a quantum network test-bed using trapped-ion quantum processors and color centers with the groups of Profs H. Haeffner and A. Sipahigil at the University of California, Berkeley.
Lin Tian, Institute for Quantum Computing
Lin completed her PhD at IMM-CNR Italy on nanowire growth (Si NWs) and characterizations (Si, GaAs and ZnSe NWs) in 2017. She joined the Quantum Photonic Devices group as a postdoctoral fellow in 2018 and has been working towards high frequency electrically-controlled single photon emitters based on GaAs/AlGaAs semiconductors. Her main research focus is on quantum optics and device characterization.
Rahul Trivedi, University of Washington
Rahul Trivedi is an assistant professor at the University of Washington (Seattle). He was previously a postdoctoral scholar at the Max Planck Institute of Quantum Optics, where he was awarded the Max Planck Harvard Research Center for Quantum Optics (MPHQ) postdoctoral fellowship. He did his PhD in electrical engineering from Stanford University, where he was a Thomas and Sarah Kailath Stanford Graduate fellow. Trivedi’s current research focuses on developing tools for simulating many-body open quantum systems, using tools from quantum information theory and quantum complexity theory to understand their limitations and develop hardware proposals for next-generation quantum information technologies. He has previously worked on computational electromagnetics, nanophotonics simulation and design, and theoretical quantum optics.
Ramona Wolf, ETH Zürich
Ramona has obtained her Bachelor’s and Master’s degrees in physics at Leibniz University Hanover, Germany. Her interest in quantum information has already sparked during the research projects she conducted for her Bachelor’s and Master’s theses. These motivated her to continue her studies with a PhD project in the quantum information theory group at the same university under the supervision of Prof. Tobias J. Osborne, which she completed in 2020.
Afterwards, she joined the group of Prof. Renato Renner at ETH Zurich (Switzerland) as a postdoc, where she now investigates theoretical and conceptual questions in quantum cryptography, with the goal of building the theoretical foundations and methods to realize practical quantum cryptographic schemes.