Otto Engine: Classical and Quantum Approach

Peña, Francisco J.; Negrete, Oscar; Cortés, Natalia; Vargas, P.

doi:10.3390/e22070755

Cited by 20 publications

(6 citation statements)

References 28 publications

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“…Under this condition, by following Ref 36 the density matrix can be expressed as, where r ’s and are reported in Appendix. The working substance undergoes a generalized Otto cycle 37 . The four stages of the cycle are as follows: Adiabatic compression (Isentropic): The system is compressed, and work is done on the system.…”

Section: Model System: the Quantum Otto Enginementioning

confidence: 99%

Quantum correlated heat engine in XY chain with Dzyaloshinskii–Moriya interactions

Asadian

Ahadpour

Мирмасоуди

2022

Sci Rep

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In this paper, we consider a heat engines composed of two interactional qubits with spin-orbit interaction (Dzyaloshinskii–Moriya (DM)) subject to an external magnetic field, so that each qubit is coupled with cold or hot source. One intention of this work is to investigate the following question: is it possible the effects of DM lead to improve basic thermodynamic quantities in this heat engine are coupled to local environments that are not necessarily at equilibrium? Moreover, we study whether or not quantum correlations can be helpful in the performance of quantum work engines. For this end, we investigate the effects of the temperature and the interaction rate of each qubit with its surrounding environment on quantum correlations such as quantum coherence and quantum discord and quantum entanglements, as well as the generated work. Finally we compare three quantum correlations (entanglement, discord, and coherence) with thermodynamic parameters and show that the output work is positive for what values of the magnetic field so that this cycle can be considered as a thermal machine.

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Section: Model System: the Quantum Otto Enginementioning

confidence: 99%

Quantum correlated heat engine in XY chain with Dzyaloshinskii–Moriya interactions

Asadian

Ahadpour

Мирмасоуди

2022

Sci Rep

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“…An analysis of the extracted work and of the efficiency in the classical and quantum versions of the magnetic Otto cycle has been performed in Ref. 32 . The authors have reached the conclusion that the amount of extracted work and efficiency in the classical case is larger than or equal to those in the quantum case.…”

Section: Quantum Workmentioning

confidence: 99%

Extractable quantum work from a two-mode Gaussian state in a noisy channel

Cuzminschi

Zubarev

Исар

2021

Sci Rep

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We study a Szilard engine based on a Gaussian state of a system consisting of two bosonic modes placed in a noisy channel. As the initial state of the system is taken an entangled squeezed thermal state, and the quantum work is extracted by performing a measurement on one of the two modes. We use the Markovian Kossakowski-Lindblad master equation for describing the time evolution of the open system and the quantum work definition based on the second order Rényi entropy to simulate the engine. We also study the information-work efficiency of the Szilard engine as a function of the system parameters. The efficiency is defined as the ratio of the extractable work averaged over the measurement angle and the erasure work, which is proportional to the information stored in the system. We show that the extractable quantum work increases with the temperature of the reservoir and the squeezing between the modes, average numbers of thermal photons and frequencies of the modes. The work increases also with the strength of the measurement, attaining the maximal values in the case of a heterodyne detection. The extractable work is decreasing by increasing the squeezing parameter of the noisy channel and it oscillates with the phase of the squeezed thermal reservoir. The efficiency mostly has a similar behavior with the extractable quantum work evolution. However information-work efficiency decreases with temperature, while the quantity of the extractable work increases.

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“…The working substance undergoes generalized a Otto cycle. This cycle consists of the following thermodynamic processes between the local equilibrium states of A, B, C and D [39] as follows:…”

Section: Model System: the Quantum Otto Enginementioning

confidence: 99%

Quantum Correlated Heat Engine In XY Chainwith Dzyaloshinskii-Moriya Interactions

Asadian

Ahadpour

Мирмасоуди

2021

Preprint

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In this paper, we consider a heat engines composed of two interactionalqubits with spin-orbit interaction (Dzyaloshinskii–Moriya (DM)) subjectto an external magnetic field, so that each qubit is considered as a cold orhot source. One intention of this work is to investigate the following question: is it possible the effects of DM lead to improve basic thermodynamicquantities in this heat engine are coupled to local environments that arenot necessarily at equilibrium? For this end, we investigate the effects ofthe temperature and the interaction rate of each qubit with its surrounding environment on quantum correlations such as quantum coherence andquantum discord and quantum entanglements, as well as the generatedwork. Finally we compare three quantum correlations (entanglement, discord, and coherence) with thermodynamic parameters and show that theoutput work is positive for what values of the magnetic field so that thiscycle can be considered as a thermal machine.

show abstract

Otto Engine: Classical and Quantum Approach

Cited by 20 publications

References 28 publications

Quantum correlated heat engine in XY chain with Dzyaloshinskii–Moriya interactions

Quantum correlated heat engine in XY chain with Dzyaloshinskii–Moriya interactions

Extractable quantum work from a two-mode Gaussian state in a noisy channel

Quantum Correlated Heat Engine In XY Chainwith Dzyaloshinskii-Moriya Interactions

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