Genuine multipartite correlations in a boundary time crystal
Genuine multipartite correlations in a boundary time crystal
复制标题
边界时间晶体中真正的多部分相关性
DOI:
--
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发表时间:
2021
影响因子:
3.7
通讯作者:
E. I. Duzzioni
中科院分区:
文献类型:
--
作者:
A.C. Lourenço;Luis Fernando dos Prazeres;T. O. Maciel;F. Iemini;E. I. Duzzioni
In this work we study genuine multipartite correlations (GMC’s) in a boundary time crystal (BTC). Boundary time crystals are nonequilibrium quantum phases of matter in contact to an environment, for which a macroscopic fraction of the many-body system breaks the time-translation symmetry. We analyze both (i) the structure (orders) of GMC’s among the subsystems, as well as (ii) their build-up dynamics for an initially uncorrelated state. We find that, in the thermodynamic limit (and only in such a limit), multipartite correlations of all orders grow indefinitely in time in the BTC phase, further displaying a persistent oscillatory behavior around their mean growth. The orders of the correlations show a power-law decaying hierarchy among its k -partitions. Moreover, in the long-time limit the GMC’s are shown extensive with the system size, contrasting to the subextensive scaling in the non time-crystal (ferromagnetic) phase of the model. We also discuss the classical and quantum nature of these correlations with basis on multipartite entanglement witnesses, specifically, the analysis of the Quantum Fisher Information (QFI). Both GMC and QFI are able to capture and distinguish the different phases of the model. Our work highlights the genuine many-body properties of these peculiar non-equilibrium phases of matter. 34 we find a valley in the dynamics of GMC’s ( I k ), so that in the next time t = 7 . 26 a peak in I k is found. This alternating behavior is maintained until t = 14 . 48, which enable us to see the matrix approaching to the quasi-diagonal NESS.
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影响因子:
56.9
作者:
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通讯作者:
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影响因子:
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DOI:
10.48550/arxiv.1706.04562
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2017
期刊:
--
影响因子:
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