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Monday, February 26, 2018 11:00 am - 11:00 am EST (GMT -05:00)

Quantum optimization using superconducting qubits: A new platform

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.

Monday, February 26, 2018 12:00 pm - 12:00 pm EST (GMT -05:00)

Critical noise parameters for assessment of quantum error correction

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.

Wednesday, February 28, 2018 10:00 am - 10:00 am EST (GMT -05:00)

Correlated dissipation: inhibiting atomic decay via cooperative dynamics

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.

Monday, March 5, 2018 2:30 pm - 2:30 pm EST (GMT -05:00)

The Quest for Solving Quantum Chromodynamics: the tensor network approach

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.

Monday, March 5, 2018 4:00 pm - 4:00 pm EST (GMT -05:00)

Deterministic Quantum Dense Coding Networks

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.

Thursday, March 8, 2018 12:00 pm - 12:00 pm EST (GMT -05:00)

Transformative Quantum Technologies (TQT) Lunch and Learn

Why a listing in London could make sense for Canadian early stage technology companies

Featured Speaker: Sarah Baker, Head of North American Strategic Engagement, London Stock Exchange Group

London is the most international stock market in the world, with more international companies listed than any other stock exchange.

Thursday, March 8, 2018 4:00 pm - 4:00 pm EST (GMT -05:00)

Deterministic Quantum Dense Coding Networks

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.

Tuesday, March 13, 2018 2:00 pm - 2:00 pm EDT (GMT -04:00)

Solution to a Long-Standing Controversy in Paul-Trap Physics

Angus Kan, Wesleyan University

The study of charged particles dynamics in a Paul trap is the foundation of its wide-ranging applications, including analyzing proteins, determining isotope ratios, and constructing a quantum computer. However, in the simplest case of two-particle dynamics, there remains a controversy on whether a two-ion planar crystal undergoes an order-to-chaos transition at a critical, well-defined trap parameter value. Via analytical and numerical investigation of the Mathieu-Coulomb equations, I show that the transition does not exist.