Projects per year
Abstract
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.
Original language | English |
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Article number | 042127 |
Pages (from-to) | 1-11 |
Journal | Physical Review A |
Volume | 99 |
Issue number | 4 |
DOIs | |
Publication status | Published - 29 Apr 2019 |
MoE publication type | A1 Journal article-refereed |
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Projects
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SQH: Superconducting quantum heat engines and refrigerators
Gubaydullin, A., Peltonen, J., Pekola, J., Thomas, G., Marin Suarez, M., Singh, S., Subero Rengel, D., Blanchet, F., Chang, Y., Mannila, E., Lvov, D. & Karimi, B.
27/09/2017 → 30/09/2022
Project: EU: ERC grants
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QTF: Finnish Centre of Excellence in Quantum Technology
Golubev, D., Maillet, O., Pekola, J., Marin Suarez, M., Mannila, E. & Blanchet, F.
01/01/2018 → 31/12/2020
Project: Academy of Finland: Other research funding