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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Quantum thermodynamics in adiabatic open systems and its trapped-ion experimental realization

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Author(s):
Hu, Chang-Kang [1, 2, 3] ; Santos, Alan C. [4] ; Cui, Jin-Ming [1, 3] ; Huang, Yun-Feng [1, 3] ; Soares-Pinto, Diogo O. [5] ; Sarandy, Marcelo S. [4] ; Li, Chuan-Feng [1, 3] ; Guo, Guang-Can [1, 3]
Total Authors: 8
Affiliation:
[1] Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026 - Peoples R China
[2] Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055 - Peoples R China
[3] Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phy, Hefei 230026 - Peoples R China
[4] Univ Fed Fluminense, Inst Fis, Av Gal Milton Tavares de Souza S-N, BR-24210346 Niteroi, RJ - Brazil
[5] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: NPJ QUANTUM INFORMATION; v. 6, n. 1 AUG 26 2020.
Web of Science Citations: 5
Abstract

Quantum thermodynamics aims at investigating both the emergence and the limits of the laws of thermodynamics from a quantum mechanical microscopic approach. In this scenario, thermodynamic processes with no heat exchange, namely, adiabatic transformations, can be implemented through quantum evolutions in closed systems, even though the notion of a closed system is always an idealization and approximation. Here, we begin by theoretically discussing thermodynamic adiabatic processes in open quantum systems, which evolve non-unitarily under decoherence due to its interaction with its surrounding environment. From a general approach for adiabatic non-unitary evolution, we establish heat and work in terms of the underlying Liouville superoperator governing the quantum dynamics. As a consequence, we derive the conditions that an adiabatic open-system quantum dynamics implies in the absence of heat exchange, providing a connection between quantum and thermal adiabaticity. Moreover, we determine families of decohering systems exhibiting the same maximal heat exchange, which imply in classes of thermodynamic adiabaticity in open systems. We then approach the problem experimentally using a hyperfine energy-level quantum bit of an Ytterbium(171)Yb(+)trapped ion, which provides a work substance for thermodynamic processes, allowing for the analysis of heat and internal energy throughout a controllable engineered dynamics. (AU)

FAPESP's process: 17/03727-0 - Quantumness of composite systems: geometry, dynamics and thermodynamics
Grantee:Diogo de Oliveira Soares Pinto
Support Opportunities: Regular Research Grants