scholarly journals Observation of a many-body dynamical phase transition with a 53-qubit quantum simulator

Nature ◽  
2017 ◽  
Vol 551 (7682) ◽  
pp. 601-604 ◽  
Author(s):  
J. Zhang ◽  
G. Pagano ◽  
P. W. Hess ◽  
A. Kyprianidis ◽  
P. Becker ◽  
...  
Keyword(s):  
Phase Transition ◽  
Many Body ◽  
Dynamical Phase Transition ◽  
Dynamical Phase ◽  
Quantum Simulator

scholarly journals Quantum dynamical phase transition in a system with many-body interactions

2007 ◽  
Vol 141 (7) ◽  
pp. 422-426 ◽  
Author(s):  
E.P. Danieli ◽  
G.A. Álvarez ◽  
P.R. Levstein ◽  
H.M. Pastawski
Keyword(s):  
Phase Transition ◽  
Many Body ◽  
Dynamical Phase Transition ◽  
Dynamical Phase ◽  
Quantum Dynamical ◽  
Many Body Interactions

scholarly journals Probing dynamical phase transitions with a superconducting quantum simulator

2020 ◽  
Vol 6 (25) ◽  
pp. eaba4935
Author(s):  
Kai Xu ◽  
Zheng-Hang Sun ◽  
Wuxin Liu ◽  
Yu-Ran Zhang ◽  
Hekang Li ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Quantum Limit ◽  
Single Shot ◽  
Many Body ◽  
Dynamical Phase Transition ◽  
Dynamical Phase ◽  
Dynamical Phase Transitions ◽  
Quantum Simulator ◽  
Many Body Systems ◽  
Loschmidt Echo

Nonequilibrium quantum many-body systems, which are difficult to study via classical computation, have attracted wide interest. Quantum simulation can provide insights into these problems. Here, using a programmable quantum simulator with 16 all-to-all connected superconducting qubits, we investigate the dynamical phase transition in the Lipkin-Meshkov-Glick model with a quenched transverse field. Clear signatures of dynamical phase transitions, merging different concepts of dynamical criticality, are observed by measuring the nonequilibrium order parameter, nonlocal correlations, and the Loschmidt echo. Moreover, near the dynamical critical point, we obtain a spin squeezing of −7.0 ± 0.8 dB, showing multipartite entanglement, useful for measurements with precision fivefold beyond the standard quantum limit. On the basis of the capability of entangling qubits simultaneously and the accurate single-shot readout of multiqubit states, this superconducting quantum simulator can be used to study other problems in nonequilibrium quantum many-body systems, such as thermalization, many-body localization, and emergent phenomena in periodically driven systems.

Dynamical phase transition of spin glasses in a magnetic field

1989 ◽  
Vol 22 (21) ◽  
pp. 4659-4664 ◽  
Author(s):  
L de Arcangelis ◽  
H J Herrmann ◽  
A Coniglio
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Spin Glasses ◽  
Dynamical Phase Transition ◽  
Dynamical Phase
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