Journal
PHYSICAL REVIEW LETTERS
Volume 120, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.030403
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Funding
- National Center for Theoretical Sciences
- Ministry of Science and Technology, Taiwan [MOST 103-2112-M-006-017-MY4, MOST 105-2811-M-006-059]
- MURI Center for Dynamic Magneto-Optics via AFOSR Award [FA9550-14-1-0040]
- Japan Society for the Promotion of Science (KAKENHI)
- IMPACT program of JST
- JSPS-RFBR Grant [17-52-50023]
- CREST Grant [JPMJCR1676]
- RIKEN-AIST Challenge Research Fund
- Sir John Templeton Foundation
- Grants-in-Aid for Scientific Research [15H02118] Funding Source: KAKEN
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The incoherent dynamical properties of open quantum systems are generically attributed to an ongoing correlation between the system and its environment. Here, we propose a novel way to assess the nature of these system-environment correlations by examining the system dynamics alone. Our approach is based on the possibility or impossibility to simulate open-system dynamics with Hamiltonian ensembles. As we show, such (im) possibility to simulate is closely linked to the system-environment correlations. We thus define the nonclassicality of open-system dynamics in terms of the nonexistence of a Hamiltonian-ensemble simulation. This classifies any nonunital open-system dynamics as nonclassical. We give examples for open-system dynamics that are unital and classical, as well as unital and nonclassical.
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