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
• Status: Discontinued
• 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). Santo André , SP, Brazil
• Associated scholarship(s): 25/14546-2 - A Generalized DQC1 approach for Quantum Machine Learning and Quantum Thermodynamics on Ensemble-Based Quantum Systems, BE.EP.PD

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.

Scientific publications

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

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., 2025-01-01. (23/13362-0)

SANTOS, JONAS F. G.; VIEIRA, CARLOS H. S.; CARDOSO, WILDER R.. Improving parameter estimation in Gaussian channels using quantum coherence. PHYSICAL REVIEW A, v. 111, n. 5, p. 14-pg., 2025-05-02. (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., 2024-11-29. (23/13362-0)