Extracting work from quantum states of radiation

Kolář, Michal; Ryabov, Artem; Filip, Radim

doi:10.1103/physreva.93.063822

Cited by 5 publications

(3 citation statements)

References 72 publications

(109 reference statements)

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“…Such coherent driving renders the entropy lower than of the initial thermal state. It is the best classical way for the preparation of states capable of transmitting more information 2 and producing more work [4][5][6][7][8][9] . Alternatively, mechanisms that do not require either external heating or driving allow us to test non-equilibrium quantum thermodynamics merging with information theory 10,11 , also at currently unexplored experimental platforms.…”

Section: Introductionmentioning

confidence: 99%

Work and information from thermal states after subtraction of energy quanta

Hloušek¹,

Ježek²,

Filip³

2017

Sci Rep

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Quantum oscillators prepared out of thermal equilibrium can be used to produce work and transmit information. By intensive cooling of a single oscillator, its thermal energy deterministically dissipates to a colder environment, and the oscillator substantially reduces its entropy. This out-of-equilibrium state allows us to obtain work and to carry information. Here, we propose and experimentally demonstrate an advanced approach, conditionally preparing more efficient out-of-equilibrium states only by a weak dissipation, an inefficient quantum measurement of the dissipated thermal energy, and subsequent triggering of that states. Although it conditionally subtracts the energy quanta from the oscillator, average energy grows, and second-order correlation function approaches unity as by coherent external driving. On the other hand, the Fano factor remains constant and the entropy of the subtracted state increases, which raise doubts about a possible application of this approach. To resolve it, we predict and experimentally verify that both available work and transmitted information can be conditionally higher in this case than by arbitrary cooling or adequate thermal heating up to the same average energy. It qualifies the conditional procedure as a useful source for experiments in quantum information and thermodynamics.

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Section: Introductionmentioning

confidence: 99%

Work and information from thermal states after subtraction of energy quanta

Hloušek¹,

Ježek²,

Filip³

2017

Sci Rep

Self Cite

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“…Finally, note that we have studied 61,62 the HMF, where the temperature dependence was in the linear additive term f (T ) X, in contrast to the quadratic term f (T ) X2 in the present Eq. ( 4).…”

Section: /14mentioning

confidence: 79%

Heat capacities of thermally manipulated mechanical oscillator at strong coupling

Kolář

Ryabov

Filip

2019

Sci Rep

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Coherent quantum oscillators are basic physical systems both in quantum statistical physics and quantum thermodynamics. Their realizations in lab often involve solid-state devices sensitive to changes in ambient temperature. We represent states of the solid-state optomechanical oscillator with temperature-dependent frequency by equivalent states of the mechanical oscillator with temperature-dependent energy levels. We interpret the temperature dependence as a consequence of strong coupling between the oscillator and the heat bath. We explore parameter regimes corresponding to anomalous behavior of mechanical and thermodynamic characteristics as a consequence of the strong coupling: (i) The localization and the purification induced by heating, and (ii) the negativity of two generalized heat capacities. The capacities can be used to witness non-linearity in the temperature dependency of the energy levels. Our phenomenological experimentally-oriented approach can stimulate development of new optomechanical and thermomechanical experiments exploring basic concepts of strong coupling thermodynamics.

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“…Work extraction can be described by the average excitation numbers of individual cavity modes coupled to hot and cold baths. Besides the thermal reservoirs, additional resources can be used for work extraction from quantum states by membrane optomechanical systems [25] and Cooper pair tunneling in Josephson junctions [26].…”

Section: Introductionmentioning

confidence: 99%

Autonomous piston engine guided by the transduction of radiation pressure inoptomechanical Brownian motors

Gül¹

2019

Turk J Phys

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We consider the Molecular Opto-mechanical systems in back-action amplification of single molecule Raman imaging. Surface Enhanced Raman Scattering (SERS) is mapped into the dissipative cavity optomechanics system of coupled resonators. We investigate the plasmon molecular vibration interactions in strong coupling regimes of cavity opto-mechanics in the presence of impurities. Eigenfunction spectrum is analyzed for the normal mode splitting of photonic and mechanical hybrid system. Back-action transduction of photons into mechanical modes is investigated by avoided crossing due to the nonlinear interactions and Casimir forces in the presence of virtual photons and radiation pressure. In Input-output coupled cavity scheme, both cavity and driving fields are analyzed for the absorption and dissipation of heat in weak and strong coupling regimes of the cascaded cavity setup. In terms of the second order coherence functions, thermodynamic work and heat engine is investigated via phonon lasing of mechanical mode in opto-mechanical implementation of Brownian motors by tuning the competing coupling strengths of impurities and nonlinearities.

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Extracting work from quantum states of radiation

Cited by 5 publications

References 72 publications

Work and information from thermal states after subtraction of energy quanta

Work and information from thermal states after subtraction of energy quanta

Heat capacities of thermally manipulated mechanical oscillator at strong coupling

Autonomous piston engine guided by the transduction of radiation pressure inoptomechanical Brownian motors

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