Peter Talkner
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View article: Charging quantum batteries via Otto machines: Influence of monitoring
Charging quantum batteries via Otto machines: Influence of monitoring Open
The charging of a quantum battery by a four-stroke quantum machine that works
\neither as an engine or a refrigerator is investigated. The presented analysis
\nprovides the energetic behavior of the combined system in terms of the heat and…
View article: Erratum: <i>Colloquium</i>: Statistical mechanics and thermodynamics at strong coupling: Quantum and classical [Rev. Mod. Phys. <b>92</b>, 041002 (2020)]
Erratum: <i>Colloquium</i>: Statistical mechanics and thermodynamics at strong coupling: Quantum and classical [Rev. Mod. Phys. <b>92</b>, 041002 (2020)] Open
Received 24 May 2022DOI:https://doi.org/10.1103/RevModPhys.94.039901© 2022 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasClassical statistical mechanicsOpen quantum systemsQuantum statistical mechanicsQuantum therm…
View article: Charging quantum batteries via Otto machines: The influence of monitoring
Charging quantum batteries via Otto machines: The influence of monitoring Open
The charging of a quantum battery by a four-stroke quantum machine that works either as an engine or a refrigerator is investigated. The presented analysis provides the energetic behavior of the combined system in terms of the heat and wor…
View article: Monitoring Quantum Otto Engines
Monitoring Quantum Otto Engines Open
Unlike classical systems, a measurement performed on a quantum system always alters its state. In this work, the impacts of two diagnostic schemes to determine the performance of quantum Otto heat engines are compared: In one scheme, the e…
View article: Comment on “Measurability of nonequilibrium thermodynamics in terms of the Hamiltonian of mean force”
Comment on “Measurability of nonequilibrium thermodynamics in terms of the Hamiltonian of mean force” Open
In a recent paper [Phys. Rev. E 101, 050101(R) (2020)PREHBM2470-004510.1103/PhysRevE.101.050101] an attempt is presented to formulate the nonequilibrium thermodynamics of an open system in terms of the Hamiltonian of mean force. The purpos…
View article: <i>Colloquium</i>: Statistical mechanics and thermodynamics at strong coupling: Quantum and classical
<i>Colloquium</i>: Statistical mechanics and thermodynamics at strong coupling: Quantum and classical Open
The statistical mechanical description of small systems staying in thermal\nequilibrium with an environment can be achieved by means of the Hamiltonian of\nmean force. In contrast to the reduced density matrix of an open quantum\nsystem, o…
View article: Quantum measurements of sums
Quantum measurements of sums Open
A method is proposed that allows one to infer the sum of the values of an\nobservable taken during contacts with a pointer state. Hereby the state of the\npointer is updated while contacted with the system and remains unchanged\nbetween co…
View article: Quantum Statistical Enhancement of the Collective Performance of Multiple Bosonic Engines
Quantum Statistical Enhancement of the Collective Performance of Multiple Bosonic Engines Open
We consider an ensemble of indistinguishable quantum machines and show that quantum statistical effects can give rise to a genuine quantum enhancement of the collective thermodynamic performance. When multiple indistinguishable bosonic wor…
View article: Quantum fluctuation theorems and power measurements
Quantum fluctuation theorems and power measurements Open
Work in the paradigm of the quantum fluctuation theorems of Crooks and Jarzynski is determined by projective measurements of energy at the beginning and end of the force protocol. In analogy to classical systems, we consider an alternative…
View article: Generalized energy measurements and quantum work compatible with fluctuation theorems
Generalized energy measurements and quantum work compatible with fluctuation theorems Open
The probability densities of work that can be exerted on a quantum system initially staying in thermal equilibrium are constrained by the fluctuation relations of Jarzynski and Crooks, when the work is determined by two projective energy m…
View article: Measurement-driven single temperature engine
Measurement-driven single temperature engine Open
A four stroke quantum engine which alternately interacts with a measurement\napparatus and a single heat bath is discussed in detail with respect to the\naverage work and heat as well as to the fluctuations of work and heat. The\nefficienc…
View article: Generation and stabilization of Bell states via repeated projective measurements on a driven ancilla qubit
Generation and stabilization of Bell states via repeated projective measurements on a driven ancilla qubit Open
A protocol is proposed to generate Bell states in two non-directly\ninteracting qubits by means of repeated measurements of the state of a central\nancilla connected to both qubits. An optimal measurement rate is found that\nminimizes the …
View article: Quantum Brownian motion under generalized position measurements: a converse Zeno scenario
Quantum Brownian motion under generalized position measurements: a converse Zeno scenario Open
We study the quantum Brownian motion of a harmonic oscillator undergoing a\nsequence of generalized position measurements. Our exact analytical results\ncapture the interplay of the measurement backaction and dissipation. Here we\ndemonstr…
View article: Nature of self-diffusion in two-dimensional fluids
Nature of self-diffusion in two-dimensional fluids Open
Self-diffusion in a two-dimensional simple fluid is investigated by both analytical and numerical means. We investigate the anomalous aspects of self-diffusion in two-dimensional fluids with regards to the mean square displacement, the tim…
View article: Role of work in matter exchange between finite quantum systems
Role of work in matter exchange between finite quantum systems Open
Close to equilibrium, the exchange of particles and heat between macroscopic systems at different temperatures and different chemical potentials is known to be governed by a matrix of transport coefficients which is positive and symmetric.…
View article: Single-temperature quantum engine without feedback control
Single-temperature quantum engine without feedback control Open
A cyclically working quantum-mechanical engine that operates at a single temperature is proposed. Its energy input is delivered by a quantum measurement. The functioning of the engine does not require any feedback control. We analyze work,…
View article: Work distributions for random sudden quantum quenches
Work distributions for random sudden quantum quenches Open
The statistics of work performed on a system by a sudden random quench is investigated. Considering systems with finite dimensional Hilbert spaces we model a sudden random quench by randomly choosing elements from a Gaussian unitary ensemb…
View article: Quantum Performance of Thermal Machines over Many Cycles
Quantum Performance of Thermal Machines over Many Cycles Open
The performance of quantum heat engines is generally based on the analysis of a single cycle. We challenge this approach by showing that the total work performed by a quantum engine need not be proportional to the number of cycles. Further…
View article: Open system trajectories specify fluctuating work but not heat
Open system trajectories specify fluctuating work but not heat Open
Based on the explicit knowledge of a Hamiltonian of mean force, the classical statistical mechanics and equilibrium thermodynamics of open systems in contact with a thermal environment at arbitrary interaction strength can be formulated. Y…
View article: Temperature suppressed diffusion vs controlling chaos in driven periodic systems
Temperature suppressed diffusion vs controlling chaos in driven periodic systems Open
Diffusion is a ubiquitous phenomenon in Nature and a key idea in almost all branches of science that quantifies irregularity of motion. The latter can arise from two main sources. First, the dynamics of the system can be deterministically …
View article: Aspects of quantum work
Aspects of quantum work Open
Various approaches of defining and determining work performed on a quantum system are compared. Any operational definition of work, however, must allow for two facts: first, that work characterizes a process rather than an instantaneous st…
View article: Aspects of work
Aspects of work Open
Various approaches of defining and determining work performed on a quantum system are compared. Any operational definition of work, however, must allow for two facts, first, that work characterizes a process rather than an instantaneous st…
View article: Aspects of work
Aspects of work Open
Various approaches of defining and determining work performed on a quantum system are compared. Any operational definition of work, however, must allow for two facts, first, that work characterizes a process rather than an instantaneous st…
View article: Unitary dynamics and finite-time measurements: a case study
Unitary dynamics and finite-time measurements: a case study Open
The inhibition of the decay of a quantum system by frequent measurements is\nknown as quantum Zeno effect. Beyond the limit of projective measurements, the\ninterplay between the unitary dynamics of the system and the coupling to a\nmeasur…