Dynamical Transition of Quantum Scrambling in a Non-Hermitian Floquet Synthetic System
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DOI: 10.1007/s10955-024-03368-8
Abstract: We investigate the dynamics of quantum scrambling, characterized by the out-of-time ordered correlators (OTOCs), in a non-Hermitian quantum kicked rotor subjected to quasi-periodical modulation in kicking potential. Quasi-periodic modulation with incommensurate frequencies creates a high-dimensional… read more here.
Keywords: quantum scrambling; dynamical transition; non hermitian; scrambling non ... See more keywords
Bound on quantum scrambling with all-to-all interactions
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DOI: 10.1103/physreva.102.022402
Abstract: We prove bounds on operator growth and infinite temperature out-of-time-ordered correlators in many-body systems with $N$ spin-$\frac{1}{2}$ degrees of freedom which interact via two-body all-to-all interactions. Our results parametrically improve previous bounds, and sharply constrain… read more here.
Keywords: scrambling interactions; bound quantum; quantum scrambling;
Quantum steering as a witness of quantum scrambling
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DOI: 10.1103/physreva.104.022614
Abstract: Jhen-Dong Lin,1,2,* Wei-Yu Lin,3,* Huan-Yu Ku ,1,2 Neill Lambert,4 Yueh-Nan Chen ,1,2,† and Franco Nori 4,5,6 1Department of Physics, National Cheng Kung University, 701 Tainan, Taiwan 2Center for Quantum Frontiers of Research & Technology, NCKU,… read more here.
Keywords: physics; witness quantum; steering witness; quantum ... See more keywords
Finite Speed of Quantum Scrambling with Long Range Interactions.
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DOI: 10.1103/physrevlett.123.250605
Abstract: In a locally interacting many-body system, two isolated qubits, separated by a large distance r, become correlated and entangled with each other at a time t≥r/v. This finite speed v of quantum information scrambling limits… read more here.
Keywords: long range; quantum scrambling; finite speed; speed quantum ... See more keywords