Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 11: Focus Session: Simulating Quantum Many-Body Systems on Noisy Intermediate-Scale Quantum Computers (joint session TT/DY)

TT 11.6: Vortrag

Montag, 16. März 2020, 17:45–18:00, HSZ 03

Crossing a topological phase transition with a quantum computer — •Bernhard Jobst1, Adam Smith1,2, Andrew Green3, and Frank Pollmann1,41Department of Physics, T42, Technische Universität München, James-Franck-Straße 1, D-85748 Garching, Germany — 2Blackett Laboratory, Imperial College London, London SW7 2AZ, United Kingdom — 3London Centre for Nanotechnology, University College London, Gordon St., London WC1H 0AH, United Kingdom — 4Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, D-80799 München, Germany

Quantum computers promise to perform computations beyond the reach of modern computers with profound implications for scientific research. Due to remarkable technological advances, small scale devices are now becoming available for use. One of the most apparent applications for such a device is the study of complex many-body quantum systems, where classical computers are unable to deal with the generic exponential complexity of quantum states. Even zero-temperature equilibrium phases of matter and the transitions between them have yet to be fully classified, with topologically protected phases presenting major difficulties. We construct and measure a continuously parametrized family of states crossing a symmetry protected topological phase transition on the IBM Q quantum computers. The simulation that we perform is easily scalable and is a practical demonstration of the utility of near-term quantum computers for the study of quantum phases of matter and their transitions.

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