Related papers: Canonical typicality under general quantum channels

Canonical typicality under general quantum channels

URL: http://arxiv.org/abs/2308.16330v2
Date: Thu, 8 Aug 2024 14:28:15 GMT
Title: Canonical typicality under general quantum channels
Authors: Pedro S. Correia, Gabriel Dias Carvalho, Thiago R. de Oliveira, Raúl O. Vallejos, Fernando de Melo,
Abstract summary: In the present work we employ quantum channels to define generalized subsystems. We show that generalized subsystems also display the phenomena of canonical typicality. In particular we demonstrate that the property regulating the emergence of the canonical typicality behavior is the entropy of the channel used to define the generalized subsystem.
Score: 39.58317527488534
License: http://creativecommons.org/licenses/by/4.0/
Abstract: With the control of ever more complex quantum systems becoming a reality, new scenarios are emerging where generalizations of the most foundational aspects of statistical quantum mechanics are imperative. In such experimental scenarios the often natural correspondence between the particles that compose the system and the relevant degrees-of-freedom might not be observed. In the present work we employ quantum channels to define generalized subsystems, which should capture the pertinent degrees-of-freedom, and obtain their associated canonical state. Moreover, we show that generalized subsystems also display the phenomena of canonical typicality, i.e., the generalized subsystem description generated from almost any microscopic pure state of the whole system will behave similarly as the corresponding canonical state. In particular we demonstrate that the property regulating the emergence of the canonical typicality behavior is the entropy of the channel used to define the generalized subsystem.

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