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Study of quantum thermodynamics of qubit systems: markonianity and thermometry

Grant number: 21/01277-2
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Start date: January 01, 2022
End date: December 31, 2025
Field of knowledge:Physical Sciences and Mathematics - Physics - General Physics
Principal Investigator:Diogo de Oliveira Soares Pinto
Grantee:Taysa Mendes de Mendonça
Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated scholarship(s):22/09219-4 - Quantum thermometry for nanoscale technology, BE.EP.PD

Abstract

The purpose of this project is the study of quantum thermodynamics in order to better understand the fundamental laws of thermodynamics and their limitations that appear when quantum effects are considered. We will cover topics of fundamental and technological relevance for the processing and detection of quantum information in real conditions, developing experiments using the Nuclear Magnetic Resonance (NMR) technique. We propose to study the influence of markovianity on thermodynamic quantum systems. The importance of this study comes from the fact that the information sent from the system for the thermal reservoir cannot be returned to the system, if this occurs we can obtain misleading information such as increasing/decreasing the energy of the system and, consequently, measuring higher/lower efficiency of quantum thermals engines. With this study we hope to find a relationship between parameters that characterize the markovianity of a nuclear spin system. Another point that will be studied in this project is how to use the work obtained by the thermal engine, that is, we will create NMR experiments where we will couple an auxiliary qubit to the qubit system (engine) making the qubit system perform work on the qubit auxiliary. Still in this work project, we will use the protocol for the development of a quantum thermometer that does not need thermalization to measure temperatures of genuine thermal reservoirs. (AU)

News published in Agência FAPESP Newsletter about the scholarship:
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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)
MENDONCA, TAYSA M.; CELERI, LUCAS C.; PATERNOSTRO, MAURO; SOARES-PINTO, DIOGO O.. System-environment quantum information flow. PHYSICAL REVIEW A, v. 110, n. 4, p. 5-pg., . (22/09219-4, 21/01277-2, 17/03727-0)