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Events - 2017

Friday, May 19, 2017 — 11:45 AM EDT

On-demand entangled photon sources

Arash Ahmadi

In this presentation I will be talking about the project we have done in our group since last October on the emission of a QD embedded in a nano-wire.

Wednesday, May 17, 2017 — 3:00 PM EDT

Quantum science and technology at QuTech (Delft, NL)

Julia Cramer, QuTech Delft

QuTech is an advanced research center for quantum computing and the quantum internet, addressing scientific and engineering challenges in collaboration with industrial partners. QuTech is striving to remain at the forefront in quantum information science and technology. I’ll give some info on the development of QuTech over the years. Furthermore, I will present what the goals and focusses are of our research teams, current work and latest milestones.

Wednesday, May 10, 2017 — 2:00 PM EDT
Joachim Nsofini

Joachim Nsofini of the Department of Physics and Astronomy is defending his thesis:

Quantum Information Enabled Neutron Interferometry

Joachim is supervised by IQC faculty member David Cory.

Tuesday, May 9, 2017 — 12:00 PM to 1:00 PM EDT

This is the seventh of the Intellectual Property (IP) Management Lunch and Learn Lecture Series. We are bringing in thought leaders in the protection and management of intellectual property, including many years of experience in relevant areas of information technology.

This session will be led by Tom Hunter.

Monday, May 8, 2017 — 2:30 PM EDT

A platform to study many-body physics with photons

Hakan Tureci, Princeton University

The past decade has seen enormous experimental progress in building superconducting electrical circuits featuring artificial atoms subject to the quantized electromagnetic field of microwave photons. The fabrication and control of superconducting circuits has reached a stage where many such elements can be wired up into intricate networks, allowing the preparation and readout of complex quantum states of photons and atoms.

Tuesday, April 25, 2017 — 1:00 PM EDT

The optimality of projections for quantum state exclusion

Abel Molina, IQC

We will first motivate the problem of quantum state exclusion of pure states, through its connections with the PBR game and with compatibility conditions for quantum state assignments. Then, we will discuss our recent result regarding the optimality of projections for perfect state exclusion of 3 pure states in 3 dimensions (arXiv:1702.06449).

Tuesday, April 25, 2017 — 12:00 PM to 1:00 PM EDT

This is the sixth of the Intellectual Property (IP) Management Lunch and Learn Lecture Series. We are bringing in thought leaders in the protection and management of intellectual property, including many years of experience in relevant areas of information technology.

This session will be led by Viona Duncan.

Monday, April 24, 2017 — 2:30 PM EDT

Dephasing with strings attached

Leonid Pryadko, University of California, Riverside

Is there a difference between the quantum dynamics of a "real" particle and a collective excitation, like that in a spin ice, which creates a measurable gauge field? I will argue that in the presence of weak dephasing, the answer depends on the quantity measured.

Friday, April 21, 2017 — 11:45 AM EDT

Quantum Information Enabled Neutron Interferometry

Joachim Nsofini, IQC

In the quest to explore big quantum systems, there have been opportunities to explore smaller quantum system like the neutron interferometer. A neutron interferometer (NI) has proven to be a useful tool in the study of quantum effects ranging from  experiments with single particle interference to measuring quantities of significant importance in condensed-matter and Standard Model physics.

Thursday, April 20, 2017 — 3:00 PM EDT

Out-of-equilibrium dynamics in AMO quantum simulators

Andrew Daley, University of Strathclyde

Thursday, April 20, 2017 — 2:30 PM EDT

Quantum simulation with laser-cooled trapped ions

Rajibul Islam, Institute for Quantum Computing

Thursday, April 20, 2017 — 11:30 AM EDT
Marco Piani

Operational characterization of quantum properties

Marco Piani, University of Strathclyde

Thursday, April 20, 2017 — 11:00 AM EDT

Quantum Technology: Theory Research at Strathclyde

John Jeffers, University of Strathclyde

I will provide a short overview of the UK national Quantum Technology Hubs and the theoretical involvement at Strathclyde in two Hubs: the Quantum Communications Hub and the Quantum Imaging Hub.
    

Monday, April 17, 2017 — 2:30 PM EDT

Scalable surface ion traps for high-fidelity quantum operations

Peter Maunz, Sandia National Laboratories

Trapped ion systems can be used to implement quantum computation as well as quantum simulation. To scale these systems to the number of qubits required to solve interesting problems in quantum chemistry or solid state physics, the use of large multi-zone ion traps has been proposed [1]. Microfabrication enables the realization of surface electrode ion traps with complex electrode structures.

Tuesday, April 11, 2017 — 12:00 PM to 1:00 PM EDT

This is the fifth of the Intellectual Property (IP) Management Lunch and Learn Lecture Series. We are bringing in thought leaders in the protection and management of intellectual property, including many years of experience in relevant areas of information technology.

This session will be led by Neil Henderson.

Monday, April 10, 2017 — 2:30 PM EDT

Quantum Gravity, Tensor Network, and Holographic Entanglement Entropy

Muxin Han, Florida Atlantic University

The relation between nonperturbative Quantum Gravity and tensor network is explored from the perspectives of bulk-boundary duality and holographic entanglement entropy. We find that the quantum gravity states in a space Σ with boundary ∂Σ is an exact holographic mapping. The tensor network, understood as the boundary quantum state, is the output of the exact holographic mapping emerging from a coarse graining procedure of quantum gravity state.

Friday, April 7, 2017 — 11:45 AM EDT

The puzzle of genuine multiparticle interference

Sascha Agne, IQC

Two recent experiments demonstrate access to a new realm of quantum phenomena called genuine multiparticle interference. For three photons this means that interference between all three photons is observed while, simultaneously, neither pairs nor single photons display interference.

Monday, April 3, 2017 — 2:30 PM EDT

Superconductivity in single-layer NbSe2

Kin Fai Mak, Pennsylvania State University

The discovery of graphene has stimulated not only the field of carbon nanoelectronics, but also studies of novel electronic phenomena in a wide range of atomically thin van der Waals’ materials. In this talk, I will discuss our recent effort in the isolation of a single layer of niobium diselenide (NbSe2), a new non-centrosymmetric superconductor.

Tuesday, March 28, 2017 — 12:00 PM to 1:00 PM EDT

This is the fourth of the Intellectual Property (IP) Management Lunch and Learn Lecture Series. We are bringing in thought leaders in the protection and management of intellectual property, including many years of experience in relevant areas of information technology.

This session will be led by Jeffrey Wong.

Monday, March 27, 2017 — 2:30 PM EDT

Rigorous RG algorithms and area laws for low energy eigenstates in 1D

Thomas Vidick, California Institute of Technology

One of the central challenges in the study of quantum many-body systems is the complexity of simulating them on a classical computer. We give a new algorithm for finding low energy states for 1D systems, based on a rigorously justified RG type transformation.

Friday, March 24, 2017 — 11:45 AM EDT

Optical manipulation of polariton in semiconductor microstructures

Félix Marsault, French National Center for Scientific Research

Cavity polaritons are bosonic quasiparticles arising from the strong coupling between photons and excitons. They can massively occupy a single quantum state in the regime of polariton lasing [1], showing particular properties such as long coherence times [1], long range spatial coherence [1] and a linearly polarized emission [1,2,3]. Moreover, they possess strong excitonic nonlinearities and thus provide a new platform for elliptical photonic manipulation, with the demonstration of a polariton spin switch [4], polariton transistors [5] and the proposal of other proof-of-principle operations for elliptical integrated logic circuits [6].

Wednesday, March 22, 2017 — 11:00 AM EDT

Entropy measurement in quantum systems

Dr. Mohammad Ansari, Peter Grünberg Institute, and Jülich-Aachen Research Alliance Institute (JARA)

Entropy is an important information measure. A complete understanding of entropy flow will have applications in quantum thermodynamics and beyond; for example it may help to identify the sources of fidelity loss in quantum communications and methods to prevent or control them. Being nonlinear in density matrix, its evaluation for quantum systems requires simultaneous evolution of more-than-one density matrix.

Monday, March 20, 2017 — 2:30 PM EDT

Robust quantum optimizer with full connectivity

Rakesh Tiwari, McGill University

Quantum phenomena have the potential to speed up the solution of hard optimization problems. For example quantum annealing, based on the quantum tunneling effect, has recently been shown to scale exponentially better with system size as compared with classical simulated annealing. However, current realizations of quantum annealers with superconducting qubits face two major challenges. First, the connectivity between the qubits is limited, excluding many optimization problems from a direct implementation.

Tuesday, March 14, 2017 — 12:00 PM to 1:00 PM EDT

This is the third of the Intellectual Property (IP) Management Lunch and Learn Lecture Series. We are bringing in thought leaders in the protection and management of intellectual property, including many years of experience in relevant areas of information technology.

This session will be led by Neil Henderson.

Tuesday, March 14, 2017 — 10:00 AM EDT

Tip induced superconductivity at mesoscopic point contacts on topological semimetals

Leena Aggarwal, Indian Institute of Science Education and Research, Mohali

I will present the observation of a new phase of matter, tip-induced superconductivity (TISC), that emerges only under mesoscopic metallic point contacts on topologically non-trivial semimetals like a 3-D Dirac semimetal Cd3As2, and a Weyl semimetal, TaAs. From theoretical considerations, it is believed that such semimetals exist near topological phase boundaries.

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