Quantum absorption refrigerator with trapped ions

Maslennikov, Gleb; Ding, Shangwu; Hablutzel, Roland; Gan, Jaren; Roulet, Alexandre; Nimmrichter, Stefan; Dai, Jibo; Scarani, Valerio; Matsukevich, Dzmitry

doi:10.1038/s41467-018-08090-0

Cited by 256 publications

(170 citation statements)

References 45 publications

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“…Since the first works exploring three-level masers as heat engines or refrigerators [4][5][6], a plethora of different models operating either in cycles [7][8][9] or in a continuous fashion [10][11][12] have been proposed. They provide both theoretical insights and proposals for implementations in the laboratory, some of which are recently seeing light [13][14][15][16][17]. Furthermore, quantum thermal machines may be of practical importance in biological processes [18,19], for measuring time [20] or small temperatures [21], as well as producing quantum resources such as entanglement [22] or coherence [23].…”

Section: Introductionmentioning

confidence: 99%

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Boosting the performance of small autonomous refrigerators via common environmental effects

et al. 2019

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We explore the possibility of enhancing the performance of small thermal machines by the presence of common noise sources. In particular, we study a prototypical model for an autonomous quantum refrigerator comprised by three qubits coupled to thermal reservoirs at different temperatures. Our results show that engineering the coupling to the reservoirs to act as common environments lead to relevant improvements in the performance. The enhancements arrive to almost double the cooling power of the original fridge without compromising its efficiency. The greater enhancements are obtained when the refrigerator may benefit from the presence of a decoherence-free subspace. The influence of coherent effects in the dissipation due to one-and two-spin correlated processes is also examined by comparison with an equivalent incoherent yet correlated model of dissipation.

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Section: Introductionmentioning

confidence: 99%

“…Proposals for their implementation in the laboratory include quantum-dot models [40,41], a setup with ions in optical cavities [42] or in circuit QED architectures [43,44]. The first experimental realization of a quantum autonomous refrigerator has been recently reported using trapped ions [16].…”

Section: Introductionmentioning

confidence: 99%

Boosting the performance of small autonomous refrigerators via common environmental effects

et al. 2019

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“…In particular, coherence in the energy eigenbasis has been identified as one of the key features distinguishing quantum thermodynamics from its classical counterpart [19][20][21]. For example, coherence may enhance the performance of quantum refrigerators [22][23][24] and heat engines [25][26][27] or be directly converted into work [28,29]. To address this point, we conclude the letter by showing that, in our setup, the above phonon-induced steady-state coherence of the DQD can in fact be exploited to drive a mode of the surrounding cavity.…”

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confidence: 99%

Tunable phonon-induced steady-state coherence in a double-quantum-dot charge qubit

et al. 2020

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Charge qubits can be created and manipulated in solid-state double-quantum-dot (DQD) platforms. Typically, these systems are strongly affected by quantum noise stemming from coupling to substrate phonons. This is usually assumed to lead to decoherence towards steady states that are diagonal in the energy eigenbasis. In this letter we show, to the contrary, that due to the presence of phonons the equilibrium steady state of the DQD charge qubit may be engineered to display coherence in the energy eigenbasis. The magnitude of the coherence can be controlled by tuning the DQD parameters and regimes of high purity maybe found. In addition, we show that the steady-state coherence can be used to drive an auxiliary cavity mode coupled to the DQD. arXiv:1906.06271v1 [cond-mat.mes-hall]

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“…In this model, the three qubits interact via a three-body coupling. An experimental realisation of a similar model with trapped ions exploiting threebody interactions has been reported in [31].…”

Section: Introductionmentioning

confidence: 99%

Three-qubit refrigerator with two-body interactions

et al. 2020

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We propose a three-qubit setup for the implementation of a variety of quantum thermal machines where all heat fluxes and work production can be controlled. An important configuration that can be designed is that of an absorption refrigerator, extracting heat from the coldest reservoir without the need of external work supply. Remarkably, we achieve this regime by using only two-body interactions instead of the widely employed threebody interactions. This configuration could be more easily realised in current experimental setups. We model the open-system dynamics with both a global and a local master equation thermodynamic-consistent approach. Finally, we show how this model can be employed as a heat valve or thermal transistor, in which by varying the local field of one of the two qubits allows one to control and amplify the heat current between the other qubits.

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Quantum absorption refrigerator with trapped ions

Cited by 256 publications

References 45 publications

Boosting the performance of small autonomous refrigerators via common environmental effects

Boosting the performance of small autonomous refrigerators via common environmental effects

Tunable phonon-induced steady-state coherence in a double-quantum-dot charge qubit

Three-qubit refrigerator with two-body interactions

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