Hybrid master equation for calorimetric measurements

Brecht Donvil, Paolo Muratore-Ginanneschi, Jukka P. Pekola

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

3 Sitaatiot (Scopus)
110 Lataukset (Pure)

Abstrakti

Ongoing experimental activity aims at calorimetric measurements of thermodynamic indicators of quantum integrated systems. We study a model of a driven qubit in contact with a finite-size thermal electron reservoir. The temperature of the reservoir changes due to energy exchanges with the qubit and an infinite-size phonon bath. Under the assumption of weak coupling and weak driving, we model the evolution of the qubit-electron temperature as a hybrid master equation for the density matrix of the qubit at different temperatures of the calorimeter. We compare the temperature evolution with an earlier treatment of the qubit-electron model, where the dynamics were modeled by a Floquet master equation under the assumption of drive intensity much larger than the qubit-electron coupling squared. We numerically and analytically investigate the predictions of the two mathematical models of dynamics in the weak-drive parametric region. We numerically determine the parametric regions where the two models of dynamics give distinct temperature predictions and those where their predictions match.

AlkuperäiskieliEnglanti
Artikkeli042127
Sivut1-11
Sivumäärä11
JulkaisuPhysical Review A
Vuosikerta99
Numero4
DOI - pysyväislinkit
TilaJulkaistu - 29 huhtik. 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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