On the classicality of quantum dephasing processes

Lonigro D, Chruściński D (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Frontiers in Quantum Science and Technology frontiers

Book Volume: 1

DOI: 10.3389/frqst.2022.1090022

Abstract

We analyze the multitime statistics associated with pure dephasing systems repeatedly probed with sharp measurements, and search for measurement protocols whose statistics satisfy the Kolmogorov consistency conditions possibly up to a finite order. We find a rich phenomenology of quantum dephasing processes which can be interpreted in classical terms. In particular, if the underlying dephasing process is Markovian, we find sufficient conditions under which classicality at every order can be found: this can be reached by choosing the dephasing and measurement basis to be fully compatible or fully incompatible, that is, mutually unbiased bases (MUBs). For non-Markovian processes, classicality can only be proven in the fully compatible case, thus revealing a key difference between Markovian and non-Markovian pure dephasing processes.

Authors with CRIS profile

Davide Lonigro

Involved external institutions

Nicolaus Copernicus University (NCU) / Uniwersytet Mikołaja Kopernika w Toruniu (UMK) PL Poland (PL) University of Bari Aldo Moro / Università degli Studi di Bari Aldo Moro IT Italy (IT)

How to cite

APA:

Lonigro, D., & Chruściński, D. (2022). On the classicality of quantum dephasing processes. Frontiers in Quantum Science and Technology, 1. https://doi.org/10.3389/frqst.2022.1090022

MLA:

Lonigro, Davide, and Dariusz Chruściński. "On the classicality of quantum dephasing processes." Frontiers in Quantum Science and Technology 1 (2022).

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