Events

Jeongmin Park - Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS) Department of Energy Science, Sungkyunkwan University

The combination of two-dimensional (2D) materials and functional oxide has been attracted in electrical transport study. Many researchers expected synergetic performance from this interesting structure. And the field effect transistor (FET) scheme was widely used to study it. Here, we successfully demonstrated graphene FET device which is fabricated on top of SrTiO3 (STO).

Matthew Day, University of Bristol and National Physical Laboratory, UK

Trapped ions are one of the most mature platforms for quantum information processing, quantum-enhanced sensing, and precision spectroscopy. Scaling to large numbers of trapped ions remains an open, technological challenge that would help advance the functionality and usefulness of the platform. The production of ion microtrap arrays, fabricated using MEMS techniques, has provided a key component to this scaling challenge.

Nikolai Lauk, University of Calgary

Realization of a quantum network that enables ecient long-distance entanglement distribution would allow for multiple impressive applications with quantum key distribution being the most prominent one.

Feihu Xu, University of Science and Technology of China

Every time you take a photo, photons strike different parts of your image sensor in different quantities. In daytime, your sensor detects more than a billion photons, which are more than 1000 photons per pixel for a basic one-megapixel camera. Can you take a photo with one photon per pixel? I will address how to perform accurate imaging at a light level of one photon per pixel.

APS March Meeting Student Practice Talk Session

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 tunnelling 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.

Pavithran Iyer, Université de Sherbrooke

Arbitrary precision quantum control of qubit systems appears to be unobtainable due to environmental influences that manifest themselves as errors in a quantum algorithm. Errors modelled by the probabilistic application of Pauli operators during the computation are convenient for analytical proofs and classical simulation but the level of accuracy of such a model depends on the quantumness of the error source.

Ana Asenjo Garcia - California Institute of Technology

Dissipation is a pervasive problem in many areas of physics. In quantum optics, losses curb our ability to realize controlled and efficient interactions between photons and atoms, which are essential for many technologies ranging from quantum information processing to metrology. Spontaneous emission - in which photons are first absorbed by atoms and then re-scattered into undesired channels - imposes a fundamental limit in the fidelities of many quantum applications, such as quantum memories and gates.

Colloquium featuring Karl Jansen - NIC/DESY Zeuthen, Germany

The strong interaction of quarks and gluons is described theoretically within the framework of Quantum Chromodynamics (QCD). The most promising way to evaluate QCD for all energy ranges is to formulate the theory on a 4 dimensional Euclidean space-time grid, which allows for numerical simulations on state of the art supercomputers. We will review the status of lattice QCD calculations providing examples such as the hadron spectrum and the inner structure of nucleons.

Seminar featuring Titas Chanda, Harish-Chandra Research Institute

Emergence of quantum information science has led to a paradigm shift in communication systems. In the past couple of decades, quantum information processing tasks like quantum cryptography, dense coding, quantum teleportation etc. have been shown to have advantages over their classical counterparts and have also been successfully implemented in laboratories.