Quantum computing

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Monday, January 29, 2018 2:30 pm - 2:30 pm EST (GMT -05:00)

Engineering magnetism and chiral edge state of quantum anomalous Hall system

Ke He, Tsinghua University

The quantum anomalous Hall (QAH) effect is a quantum Hall effect induced by spontaneous magnetization instead of an external magnetic field. The effect occurs in two-dimensional (2D) insulators with topologically nontrivial electronic band structure which is characterized by a non-zero Chern number. The experimental observation of the QAH effect in thin films of magnetically doped (Bi,Sb)2Te3 topological insulators (TIs) paves the way for practical applications of dissipationless quantum Hall edge states.

Wednesday, October 11, 2017 1:00 pm - 1:00 pm EDT (GMT -04:00)

Toward the first quantum simulation with quantum speedup

Neil Julien Ross, Dalhousie University

As we approach the development of a quantum computer with tens of
well-controlled qubits, it is natural to ask what can be done with
such a device. Specifically, we would like to construct an example of
a practical problem that is beyond the reach of classical computers,
but that requires the fewest possible resources to solve on a quantum
computer. We address this problem by considering quantum simulation of
spin systems, a task that could be applied to understand phenomena in

Thursday, September 28, 2017 1:00 pm - 1:00 pm EDT (GMT -04:00)

Application of a resource theory for magic states to fault-tolerant quantum computing

Mark Howard & Earl T. Campbell

Motivated by their necessity for most fault-tolerant quantum computation schemes, we formulate a resource theory for magic states. We first show that robustness of magic is a well-behaved magic monotone that operationally quantifies the classical simulation overhead for a Gottesman-Knill type scheme using ancillary magic states. Our framework subsequently finds immediate application in the task of synthesizing non-Clifford gates using magic states.