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Nonclassical aspects and coherence effects on quantum thermodynamics

Grant number: 23/13362-0
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Start date: July 01, 2024
End date: June 30, 2026
Field of knowledge:Physical Sciences and Mathematics - Physics - General Physics
Principal Investigator:Roberto Menezes Serra
Grantee:Carlos Henrique da Silva Vieira
Host Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil

Abstract

We are witnessing the accelerated development of quantum technologies at the stage known as NISQ (Noisy Intermediate-Scale Quantum Technology). Analogous to the development of classical technologies, thermodynamic limits play a fundamental role in the quantum one. In typical scenarios in the area, we have small-scale systems that are far from equilibrium, where thermal and quantum fluctuations are relevant. The present research project incorporates theoretical and experimental aspects and focuses on exploring the role played by quantum characteristics, namely coherence and non-classical correlations, in the stochastic thermodynamics of non-equilibrium quantum systems and devices. Specifically, we intend to derive new fluctuation relations that take into account the characteristics introduced by the presence of quantum correlations and coherence in non-equilibrium processes involving energetic exchanges. Furthermore, we will also investigate how to use non-classical features to improve thermodynamic processes in quantum systems, in particular, work extraction, refrigeration and heat transport protocols. From an experimental point of view, we intend to verify these new generalized fluctuation theorems and thermodynamic uncertainty relations, using spin qubits and Nuclear Magnetic Resonance techniques in molecules that can encode between two and six qubits in nuclear spins. Another goal that we will explore theoretically and experimentally refers to the possible advantages associated with processes that exhibit an indefinite causal order. In this direction, we will seek to analyze the consequences arising from this coherent control in energy exchange protocols in quantum thermal devices. The execution of this project should culminate in several original and relevant results in Quantum Thermodynamics with possibilities for practical applications in new quantum technologies.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PORTO, JOAO C. P.; MARINHO, LUCAS S.; DIEGUEZ, PEDRO R.; DA PAZ, IRISMAR G.; VIEIRA, CARLOS H. S.. Enhancing Gaussian quantum metrology with position-momentum correlations. PHYSICA SCRIPTA, v. 100, n. 1, p. 16-pg., . (23/13362-0)
DA SILVA, PEDRO P.; VIEIRA, CARLOS H. S.; MARINHO, LUCAS S.; SAMPAIO, MARCOS; DA PAZ, IRISMAR G.. The role of position-momentum correlations in coherence freezing and purity behavior of macromolecular gaussian states. EUROPEAN PHYSICAL JOURNAL PLUS, v. 139, n. 11, p. 13-pg., . (23/13362-0)