Realization of a discrete time crystal on 57 qubits of a quantum
computer
- URL: http://arxiv.org/abs/2105.06632v3
- Date: Mon, 17 Jan 2022 02:50:26 GMT
- Title: Realization of a discrete time crystal on 57 qubits of a quantum
computer
- Authors: Philipp Frey, Stephan Rachel
- Abstract summary: We report the observation of a discrete time crystal on a chain consisting of 57 superconducting qubits on a state-of-the-art quantum computer.
We probe random initial states and compare the cases of vanishing and finite disorder to distinguish many-body localization from pre-thermal dynamics.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Novel dynamical phases that violate ergodicity have been a subject of
extensive research in recent years. A periodically driven system is naively
expected to lose all memory of its initial state due to thermalization, yet
this can be avoided in the presence of many-body localization. A discrete time
crystal represents a driven system whose local observables spontaneously break
time translation symmetry and retain memory of the initial state indefinitely.
Here we report the observation of a discrete time crystal on a chain consisting
of 57 superconducting qubits on a state--of--the--art quantum computer. We
probe random initial states and compare the cases of vanishing and finite
disorder to distinguish many-body localization from pre-thermal dynamics. We
further report results on the dynamical phase transition between the discrete
time crystal and a thermal regime, which is observed via critical fluctuations
in the system's sub-harmonic frequency response and a significant speed-up of
spin depolarisation.
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