The Experts below are selected from a list of 13548 Experts worldwide ranked by ideXlab platform

Udo Seifert - One of the best experts on this subject based on the ideXlab platform.

  • stochastic thermodynamics of Bipartite Systems transfer entropy inequalities and a maxwell s demon interpretation
    Journal of Statistical Mechanics: Theory and Experiment, 2014
    Co-Authors: David Hartich, Andre C Barato, Udo Seifert
    Abstract:

    We consider the stationary state of a Markov process on a Bipartite System from the perspective of stochastic thermodynamics. One subSystem is used to extract work from a heat bath while being affected by the second subSystem. We show that the latter allows for a transparent and thermodynamically consistent interpretation of a Maxwell's demon. Moreover, we obtain an integral fluctuation theorem involving the transfer entropy from one subSystem to the other. Comparing three different inequalities, we show that the entropy decrease of the first subSystem provides a tighter bound on the rate of extracted work than either the rate of transfer entropy from this subSystem to the demon or the heat dissipated through the dynamics of the demon. The latter two rates cannot be ordered by an inequality, as shown with the illustrative example of a four state System.

  • Stochastic thermodynamics of Bipartite Systems: transfer entropy inequalities and a Maxwell's demon interpretation
    Journal of Statistical Mechanics: Theory and Experiment, 2014
    Co-Authors: David Hartich, Andre C Barato, Udo Seifert
    Abstract:

    We consider the stationary state of a Markov process on a Bipartite System from the perspective of stochastic thermodynamics. One subSystem is used to extract work from a heat bath while being affected by the second subSystem. We show that the latter allows for a transparent and thermodynamically consistent interpretation of a Maxwell's demon. Moreover, we obtain an integral fluctuation theorem involving the transfer entropy from one subSystem to the other. Comparing three different inequalities, we show that the entropy decrease of the first subSystem provides a tighter bound on the rate of extracted work than both the rate of transfer entropy from this subSystem to the demon and the heat dissipated through the dynamics of the demon. The latter two rates cannot be ordered by an inequality as shown with the illustrative example of a four state System.

David Hartich - One of the best experts on this subject based on the ideXlab platform.

  • stochastic thermodynamics of Bipartite Systems transfer entropy inequalities and a maxwell s demon interpretation
    Journal of Statistical Mechanics: Theory and Experiment, 2014
    Co-Authors: David Hartich, Andre C Barato, Udo Seifert
    Abstract:

    We consider the stationary state of a Markov process on a Bipartite System from the perspective of stochastic thermodynamics. One subSystem is used to extract work from a heat bath while being affected by the second subSystem. We show that the latter allows for a transparent and thermodynamically consistent interpretation of a Maxwell's demon. Moreover, we obtain an integral fluctuation theorem involving the transfer entropy from one subSystem to the other. Comparing three different inequalities, we show that the entropy decrease of the first subSystem provides a tighter bound on the rate of extracted work than either the rate of transfer entropy from this subSystem to the demon or the heat dissipated through the dynamics of the demon. The latter two rates cannot be ordered by an inequality, as shown with the illustrative example of a four state System.

  • Stochastic thermodynamics of Bipartite Systems: transfer entropy inequalities and a Maxwell's demon interpretation
    Journal of Statistical Mechanics: Theory and Experiment, 2014
    Co-Authors: David Hartich, Andre C Barato, Udo Seifert
    Abstract:

    We consider the stationary state of a Markov process on a Bipartite System from the perspective of stochastic thermodynamics. One subSystem is used to extract work from a heat bath while being affected by the second subSystem. We show that the latter allows for a transparent and thermodynamically consistent interpretation of a Maxwell's demon. Moreover, we obtain an integral fluctuation theorem involving the transfer entropy from one subSystem to the other. Comparing three different inequalities, we show that the entropy decrease of the first subSystem provides a tighter bound on the rate of extracted work than both the rate of transfer entropy from this subSystem to the demon and the heat dissipated through the dynamics of the demon. The latter two rates cannot be ordered by an inequality as shown with the illustrative example of a four state System.

Kapil K. Sharma - One of the best experts on this subject based on the ideXlab platform.

  • Herring-Flicker coupling and thermal quantum correlations in Bipartite System
    Quantum Information Processing, 2018
    Co-Authors: Kapil K. Sharma
    Abstract:

    In this paper, we study thermal quantum correlations as quantum discord and entanglement in Bipartite System imposed by external magnetic field with Herring–Flicker coupling, i.e., $$J(R)=1.642 e^{-2 R} R^{5/2}+O(R^{2}e^{-2R})$$ . The Herring–Flicker coupling strength is the function of R, which is the distance between spins and Systems carry XXX Heisenberg interaction. By tuning the coupling distance R, temperature and magnetic field quantum correlations can be scaled in the Bipartite System. We find the long sustainable behavior of quantum discord in comparison with entanglement over the coupling distance R. We also investigate the situations, where entanglement totally dies but quantum discord exists in the System.

  • Herring-Flicker coupling and thermal quantum correlations in Bipartite System
    2017
    Co-Authors: Kapil K. Sharma
    Abstract:

    In this letter we study thermal quantum correlations as quantum discord and entanglement in Bipartite System imposed by external magnetic field with Herring-Flicker coupling ie. $J(R)=1.642 e^{-2 R} R^{5/2}+O(R^{2}e^{-2R})$. The Herring-Flicker coupling strength is the function of $R$, which is the distance between spins and Systems carry XXX Heisenberg interaction. By tuning the coupling distance $R$, temperature and magnetic field quantum correlations can be scaled in the Bipartite System. We find the long sustainable behaviour of quantum discord in comparison to entanglement over the coupling distance $R$. We also investigate the situations, where entanglement totally dies but quantum discord exist in the System. The present findings in the letter may be useful for designing quantum wires, data bus, solid state gates and quantum processors.

  • Sudden vanishing of thermal entanglement with Herring-Flicker coupling in Bipartite System
    2017
    Co-Authors: Kapil K. Sharma
    Abstract:

    In this letter we study thermal entanglement in Bipartite spin System imposed by external magnetic field with Herring-Flicker coupling ie. $J(R)=1.642 e^{-2 R} R^{5/2}+O(R^{2}e^{-2R})$. The Herring-Flicker coupling strength is the function of $R$, which is the distance between spins. By tuning the coupling distance the entanglement can be scaled in the Bipartite System. In the present letter we find the thermal entanglement suddenly vanish from the System over the coupling distance $R$. We also investigate the parameter values where the thermal entanglement vanishing takes place. The present findings in the letter may be useful for designing quantum wires, data bus, solid state gates and quantum processors with spin Systems.

Alexey E. Rastegin - One of the best experts on this subject based on the ideXlab platform.

  • Separability conditions based on local fine-grained uncertainty relations
    Quantum Information Processing, 2016
    Co-Authors: Alexey E. Rastegin
    Abstract:

    Many protocols of quantum information processing use entangled states. Hence, separability criteria are of great importance. We propose new separability conditions for a Bipartite finite-dimensional System. They are derived by using fine-grained uncertainty relations. Fine-grained uncertainty relations can be obtained by consideration of the spectral norms of certain positive matrices. One of possible approaches to separability conditions is connected with upper bounds on the sum of maximal probabilities. Separability conditions are often formulated for measurements that have a special structure. For instance, mutually unbiased bases and mutually unbiased measurements can be utilized for such purposes. Using resolution of the identity for each subSystem of a Bipartite System, we construct some resolution of the identity in the product of Hilbert spaces. Separability conditions are then formulated in terms of maximal probabilities for a collection of specific outcomes. The presented conditions are compared with some previous formulations. Our results are exemplified with entangled states of a two-qutrit System.

Andre C Barato - One of the best experts on this subject based on the ideXlab platform.

  • stochastic thermodynamics of Bipartite Systems transfer entropy inequalities and a maxwell s demon interpretation
    Journal of Statistical Mechanics: Theory and Experiment, 2014
    Co-Authors: David Hartich, Andre C Barato, Udo Seifert
    Abstract:

    We consider the stationary state of a Markov process on a Bipartite System from the perspective of stochastic thermodynamics. One subSystem is used to extract work from a heat bath while being affected by the second subSystem. We show that the latter allows for a transparent and thermodynamically consistent interpretation of a Maxwell's demon. Moreover, we obtain an integral fluctuation theorem involving the transfer entropy from one subSystem to the other. Comparing three different inequalities, we show that the entropy decrease of the first subSystem provides a tighter bound on the rate of extracted work than either the rate of transfer entropy from this subSystem to the demon or the heat dissipated through the dynamics of the demon. The latter two rates cannot be ordered by an inequality, as shown with the illustrative example of a four state System.

  • Stochastic thermodynamics of Bipartite Systems: transfer entropy inequalities and a Maxwell's demon interpretation
    Journal of Statistical Mechanics: Theory and Experiment, 2014
    Co-Authors: David Hartich, Andre C Barato, Udo Seifert
    Abstract:

    We consider the stationary state of a Markov process on a Bipartite System from the perspective of stochastic thermodynamics. One subSystem is used to extract work from a heat bath while being affected by the second subSystem. We show that the latter allows for a transparent and thermodynamically consistent interpretation of a Maxwell's demon. Moreover, we obtain an integral fluctuation theorem involving the transfer entropy from one subSystem to the other. Comparing three different inequalities, we show that the entropy decrease of the first subSystem provides a tighter bound on the rate of extracted work than both the rate of transfer entropy from this subSystem to the demon and the heat dissipated through the dynamics of the demon. The latter two rates cannot be ordered by an inequality as shown with the illustrative example of a four state System.