Thermodynamics and coherence in quantum systems

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School of Science | Doctoral thesis (article-based) | Defence date: 2023-11-24
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Date

2023

Department

Teknillisen fysiikan laitos
Department of Applied Physics

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Degree programme

Language

en

Pages

100 + app. 60

Series

Aalto University publication series DOCTORAL THESES, 187/2023

Abstract

Quantum thermodynamics, an emerging interdisciplinary field, bridges the gap between quantum mechanics and classical thermodynamics. This thesis delves into quantum thermodynamic phenomena and their real-world applications across multiple physical domains, placing a particular emphasis on quantum coherence. The work includes theoretical and experimental studies of thermoelectric and heat currents in hybrid superconducting structures, originating from coherent Cooper pair splitting and elastic cotunneling effects. Furthermore, the work examines entropy dynamics in correlated qubit systems, utilizing the mathematical formalism and results of quantum information theory. Finally, a global-distance quantum key distribution scheme is proposed. The solution leverages coherent optical states and is based on the quantum foundations of the Second Law of Thermodynamics. The work demonstrates the practical impact of the addressed thermodynamic phenomena, laying a foundation for future applications.

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Supervising professor

Hakonen, Pertti, Prof., Aalto University, Department of Applied Physics, Finland

Keywords

quantum thermodynamics, quantum mechanics, coherence, mesoscopic physics, quantum transport, Cooper pair splitting, elastic cotunneling, quantum entanglement, superconductor, graphene, non-local thermoelectricity, heat switch, scattering matrix, quantum information, qubit, entropy, second law of thermodynamics, Maxwell demon, H-theorem, quantum key distribution, QKD, reflectometry, optical amplification, quantum communications

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Parts

  • [Publication 1]: N.S. Kirsanov, Z.B. Tan, D.S. Golubev, P.J. Hakonen, and G.B. Lesovik. Heat switch and thermoelectric effects based on Cooper-pair splitting and elastic cotunneling. Physical Review B, 99, 115127, March 2019.
    Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-201905062722
    DOI: 10.1103/PhysRevB.99.115127 View at publisher
  • [Publication 2]: Z.B. Tan, A. Laitinen, N.S. Kirsanov, A. Galda, V.M. Vinokur, M. Haque, A. Savin, D.S. Golubev, G.B. Lesovik, and P.J. Hakonen. Thermoelectric current in a graphene Cooper pair splitter. Nature Communications, 12, 138, January 2021.
    Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-202101251466
    DOI: 10.1038/s41467-020-20476-7 View at publisher
  • [Publication 3]: D.S. Golubev, N.S. Kirsanov, Z.B. Tan, A. Laitinen, A. Galda, V.M. Vinokur, M. Haque, A. Savin, G.B. Lesovik, and P.J. Hakonen. Nonlocal thermoelectricity in a hybrid superconducting graphene device. AIP Conference Proceedings, 2362, 030003, June 2021.
    Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-202108048183
    DOI: 10.1063/5.0054927 View at publisher
  • [Publication 4]: N.S. Kirsanov, A.V. Lebedev, M.V. Suslov, V.M. Vinokur, G. Blatter, and G.B. Lesovik. Entropy dynamics in the system of interacting qubits. Journal of Russian Laser Research, 39, 120-127, April 2018.
    DOI: 10.1007/s10946-018-9698-0 View at publisher
  • [Publication 5]: N.S. Kirsanov, V.A. Pastushenko, A.D. Kodukhov, M.V. Yarovikov, A.B. Sagingalieva, D.A. Kronberg, M. Pflitsch, and V.M. Vinokur. Forty thousand kilometers under quantum protection. Scientific Reports, 13, 8756, May 2023. https://www.nature.com/articles/s41467-020-20476-7

Citation

Permanent link to this item

https://urn.fi/URN:ISBN:978-952-64-1514-7

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[diss] Perustieteiden korkeakoulu / SCI