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Events - April 2014

Monday, April 28, 2014 — 2:30 PM to 3:30 PM EDT

Raul Garcia-Patron, Max-Planck-Institut für Quantenoptik

Monday, April 28, 2014 — 11:00 AM to 12:00 PM EDT

Magdalena Stobinska, University of Gdańsk/Polish Academy of Sciences, Warsaw

We discuss a device capable of filtering out two-mode states of light with mode populations differing by more than a certain threshold, while not revealing which mode is more populated. It would allow engineering of macroscopic quantum states of light in a way which is preserving specific superpositions. As a result, it would enhance optical phase estimation with these states. We propose an optical scheme, which is a relatively simple, albeit non-ideal, operational implementation of such a filter.

Tuesday, April 22, 2014 — 11:00 AM to 12:00 PM EDT

Michael Hilke, McGill University

Monday, April 21, 2014 — 1:00 PM EDT

Takashi Imai, McMaster University

NMR (Nuclear Magnetic Resonance) is a versatile probe of condensed matter, and has a broad range of applications in chemistry, medicine (MRI), oil industry, etc. NMR has become so popular outside the conventional realm of physics that the crucial role NMR has been playing in condensed matter physics is sometimes overlooked. I will explain how condensed matter physicists use NMR as a powerful low energy probe of solids, drawing examples from modern research into statistical physics, magnetism, and superconductivity.

Thursday, April 17, 2014 — 2:00 PM to 3:00 PM EDT

Amir Jafari-Salim, IQC

Thursday, April 17, 2014 — 12:00 PM to 1:00 PM EDT

Robin Kothari

We provide a quantum algorithm for simulating the
dynamics of sparse Hamiltonians with complexity sublogarithmic in
the inverse error, an exponential improvement over previous methods.
Unlike previous approaches based on product formulas, the query
complexity is independent of the number of qubits acted on, and for
time-varying Hamiltonians, the gate complexity is logarithmic in the
norm of the derivative of the Hamiltonian. Our algorithm is based on
a significantly improved simulation of the continuous- and

Wednesday, April 9, 2014 — 3:00 PM to 4:00 PM EDT

Joseph F. Traub, Columbia University

We introduce the notion of strong quantum speedup. To compute this
speedup one must know the classical computational complexity. What is it about the problems of quantum physics and quantum chemistry that enable us to get lower bounds on the classical complexity?

Wednesday, April 9, 2014 — 10:30 AM EDT

Volkher Scholz, Institute for Theoretical Physics ETH Zurich

Tuesday, April 8, 2014 — 11:00 AM EDT

Jingyun Fan, National Institute of Standards and Technology

Monday, April 7, 2014 — 2:30 PM EDT

Fernando Pastawski, California Institute of Technology

Monday, April 7, 2014 — 1:00 PM EDT

Layla Hormozi, National University of Ireland

Wednesday, April 2, 2014 — 7:00 PM EDT

The Institute for Quantum Computing's (IQC) Grad Student Association  is screening the 7 Academy Award winning movie Gravity on April 2nd at 7 pm. The event will be followed by a short presentation and Q&A with IQC's  associate member, astronaut, and former Canadian Space Agency president Steve MacLean.

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