Complexity from the reduced density matrix: a new diagnostic for chaos
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Abstract We investigate circuit complexity to characterize chaos in multiparticle quantum systems. In the process, we take a stride to analyze open quantum systems by using complexity. We propose a new diagnostic of quantum chaos from complexity based on the reduced density matrix by exploring different types of quantum circuits. Through explicit calculations on a toy model of two coupled harmonic oscillators, where one or both of the oscillators are inverted, we demonstrate that the evolution of complexity is a possible diagnostic of chaos.
2005 ◽
Vol 204
(1-2)
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pp. 110-121
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2019 ◽
Vol 49
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pp. 1960008
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2006 ◽
Vol 125
(17)
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pp. 174105
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