Floquet quantum thermal transistor

Gupt, Nikhil; Bhattacharyya, Srijan; Das, Bikash; Datta, Saiti; Mukherjee, Victor; Ghosh, Arnab

doi:10.1103/physreve.106.024110

Cited by 28 publications

(9 citation statements)

References 51 publications

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“…We will now present typical results which illustrate the versatility of a three-terminal device, demonstrating in particular its ability to perform hybrid tasks. In addition, we will show that the same setup can be configured as a useful thermal transistor [13,[70][71][72][73][74]. Hereafter, we consider the quantum regime [13]…”

Section: Resultsmentioning

confidence: 98%

Hybrid quantum thermal machines with dynamical couplings

Cavaliere¹,

Razzoli²,

Carrega³

et al. 2023

Preprint

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Quantum thermal machines can perform useful tasks, such as delivering power, cooling, or heating. In this work, we consider hybrid thermal machines, that can execute more than one task simultaneously. We characterize and find optimal working conditions for a threeterminal quantum thermal machine, where the working medium is a quantum harmonic oscillator, coupled to three heat baths, with two of the couplings driven periodically in time. We show that it is possible to operate the thermal machine efficiently, in both pure and hybrid modes, and to switch between different operational modes simply by changing the driving frequency. Moreover, the proposed setup can also be used as a high-performance transistor, in terms of output-to-input signal and differential gain. Due to its versatility and tunability, our model may be of interest for engineering thermodynamic tasks and for thermal management in quantum technologies.

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Section: Resultsmentioning

confidence: 98%

Hybrid quantum thermal machines with dynamical couplings

Cavaliere¹,

Razzoli²,

Carrega³

et al. 2023

Preprint

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show abstract

“…We implement the strong-coupling formalism following References [ 19 , 36 , 37 , 38 , 39 , 40 , 41 ] to arrive at the master equation describing the time evolution of the density matrix

of the coupled QDs system (See Appendix A )

under Born, Markov, and the secular approximation [ 19 , 21 , 34 ]. It is important to note here that the strong coupling formalism refers to the coupling between the dots, while the system–bath coupling is still assumed to be weak so that the Born–Markov approximation can safely be implemented [ 19 , 36 , 37 , 38 , 39 , 40 , 41 ]. This implies that the Lindbladians are obtained on the basis of the eigenstates of the full system Hamiltonian

.…”

Section: Model and Dynamicsmentioning

confidence: 99%

“…For the steady state operation, the master Equation ( 2 ) drives the system towards a Gibbs-like stationary state, characterized by [ 41 , 42 ]

where

. For the detailed derivation of the steady state’s heat current, we refer readers to the review articles by Kosloff and Gelbwaser et al [ 42 , 44 ].…”

Section: Evaluation Of Steady State Heat Currentmentioning

confidence: 99%

Universal Behavior of the Coulomb-Coupled Fermionic Thermal Diode

Ghosh

Gupt

Ghosh

2022

Entropy

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We propose a minimal model of a Coulomb-coupled fermionic quantum dot thermal diode that can act as an efficient thermal switch and exhibit complete rectification behavior, even in the presence of a small temperature gradient. Using two well-defined dimensionless system parameters, universal characteristics of the optimal heat current conditions are identified. It is shown to be independent of any system parameter and is obtained only at the mean transitions point “−0.5”, associated with the equilibrium distribution of the two fermionic reservoirs, tacitly referred to as “universal magic mean”.

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“…We implement the strong-coupling formalism [19,[36][37][38][39][40][41] to arrive at the master equation describing the timeevolution of the density matrix ρ of the coupled QDs system (See Appendix A)…”

Section: Model and Dynamicsmentioning

confidence: 99%

Universal behaviour of Coulomb coupled Fermionic thermal diode

Ghosh¹,

Gupt²,

Ghosh³

2022

Preprint

View full text Add to dashboard Cite

We propose a minimal model of a Coulomb coupled fermionic quantum dot thermal diode that can act as an efficient thermal switch and exhibit complete rectification behaviour, even in presence of a small temperature gradient. Using two well defined dimensionless system parameters, universal characteristics of the optimal heat current condition are identified. It is shown to be independent of any system parameter and is obtained only at the mean transitions point "−0.5", associated with the equilibrium distribution of the two fermionic reservoirs, tacitly referred as "universal magic mean".

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Floquet quantum thermal transistor

Cited by 28 publications

References 51 publications

Hybrid quantum thermal machines with dynamical couplings

Hybrid quantum thermal machines with dynamical couplings

Universal Behavior of the Coulomb-Coupled Fermionic Thermal Diode

Universal behaviour of Coulomb coupled Fermionic thermal diode

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