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Inevitable sign problems and ground state sampling complexity

Tuesday February 6, 2018
3:30 pm

 Presenter:  Elizabeth Crosson, California Institute of Technology
 Series:  CQuIC Seminars
 Abstract:  The equilibrium states of quantum systems without a sign problem can in many cases be efficiently sampled using classical Markov chain Monte Carlo algorithms. These classical algorithms challenge the possibility of obtaining quantum speedups using transverse-field quantum annealing, and this has motivated efforts to design quantum annealing architectures with a sign problem that cannot be removed by any change of the local basis. In this talk I'll explain how to detect and certify the presence of such inevitable sign problems, which can be used to generate ground state probability distributions that defy classical simulation and achieve quantum supremacy with next-generation quantum annealing devices.
 Host:  Ivan Deutsch
 Location:  Room 190, Physics & Astronomy

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