Information-to-work conversion by Maxwell’s demon in a superconducting circuit quantum electrodynamical system

Masuyama, Yoshiro; Funo, Ken; Murashita, Yûto; Noguchi, Atsushi; Kono, Shingo; Tabuchi, Yoshihiko; Yamazaki, Rekishu; Ueda, Masahito; Nakamura, Y.

doi:10.1038/s41467-018-03686-y

Cited by 155 publications

(108 citation statements)

References 37 publications

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“…The engines with N > S exhibit negative efficiency. Our observation of maximum efficiency at finite error cannot be predicted from recently demonstrated discrete information engine 18 , which shows efficiency maximum at /0 NS .…”

Section:  contrasting

confidence: 87%

Efficiency fluctuations and noise induced refrigerator-to-heater transition in information engines

et al. 2020

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Understanding noisy information engines is a fundamental problem of non-equilibrium physics, particularly in biomolecular systems agitated by thermal and active fluctuations in the cell. By the generalized second law of thermodynamics, the efficiency of these engines is bounded by the mutual information passing through their noisy feedback loop. Yet, direct measurement of the interplay between mutual information and energy has so far been elusive. To allow such examination, we explore here the entire phase-space of a noisy colloidal information engine, and study efficiency fluctuations due to the stochasticity of the mutual information and extracted work. We find that the average efficiency is maximum for non-zero noise level, at which the distribution of efficiency switches from bimodal to unimodal, and the stochastic efficiency often exceeds unity. We identify a line of anomalous, noise-driven equilibrium states that defines a refrigerator-to-heater transition, and test the generalized integral fluctuation theorem for continuous engines.

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Section:  contrasting

confidence: 87%

Efficiency fluctuations and noise induced refrigerator-to-heater transition in information engines

et al. 2020

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“…3 the threshold value of J for low temperatures asymptotically approaches 50 MHz, which is a typical value for qubit-qubit coupling in experimental setups using transmon qubits [44]. It is also worth mentioning that the value ofκ can be determined experimentally, provided that we know the temperature of the bath, by detecting the relaxation time of the qubit via a dispersive measurement of the qubit state following a driving pulse [45]. We conclude this section by inspecting the behavior of N vs J /κ at fixed temperature, as displayed in Fig.…”

Section: -3mentioning

confidence: 99%

Thermodynamic fingerprints of non-Markovianity in a system of coupled superconducting qubits

et al. 2018

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The exploitation and characterization of memory effects arising from the interaction between system and environment is a key prerequisite for quantum reservoir engineering beyond the standard Markovian limit. In this paper we investigate a prototype of non-Markovian dynamics experimentally implementable with superconducting qubits. We rigorously quantify non-Markovianity, highlighting the effects of the environmental temperature on the Markovian to non-Markovian crossover. We investigate how memory effects influence, and specifically suppress, the ability to perform work on the driven qubit. We show that the average work performed on the qubit can be used as a diagnostic tool to detect the presence or absence of memory effects.

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“…Several experimental studies have been conducted, using Brownian particles [21], molecular machines [22], photonic systems [23], electronic systems [24][25][26][27], ultracold atoms [28], and DNA molecules [29]. In addition, several experiments on Maxwell's demon in the quantum regime have recently been presented [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Maxwell's demon in a double quantum dot with continuous charge detection

et al. 2020

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Converting information into work has during the last decade gained renewed interest as it gives insight into the relation between information theory and thermodynamics. Here we theoretically investigate an implementation of Maxwell's demon in a double quantum dot and demonstrate how heat can be converted into work using only information. This is accomplished by continuously monitoring the charge state of the quantum dots and transferring electrons against a voltage bias using a feedback scheme. We investigate the electrical work produced by the demon and find a non-Gaussian work distribution. To illustrate the effect of a realistic charge detection scheme, we develop a model taking into account noise as well as a finite delay time, and show that an experimental realization is feasible with present day technology. Depending on the accuracy of the measurement, the system is operated as an implementation of Maxwell's demon or a single-electron pump.

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Information-to-work conversion by Maxwell’s demon in a superconducting circuit quantum electrodynamical system

Cited by 155 publications

References 37 publications

Efficiency fluctuations and noise induced refrigerator-to-heater transition in information engines

Efficiency fluctuations and noise induced refrigerator-to-heater transition in information engines

Thermodynamic fingerprints of non-Markovianity in a system of coupled superconducting qubits

Maxwell's demon in a double quantum dot with continuous charge detection

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