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Standard entropy9/19/2023 ![]() In (c),(d) we plot the classical and quantum contributions, which are obtained by subtracting or adding the symmetric function given in Eq. ( 32)]. In (a),(b) we plot the symmetric and antisymmetric contributions to the correlation. Beyond numerical simulations, we also believe this quantum-classical partition can be useful in analyzing the role of quantum environments in quantum thermodynamics, quantum control, and quantum transport.Ĭorrelations for the Brownian spectral density at zero temperature. For this reason, it might allow interested researchers to analyze and simulate challenging regimes in open quantum systems without the need to learn new formalisms or to use excessive computational processing power. Overall, one main feature of this method is its balance between conceptual simplicity (it requires only classical averaging on top of standard quantum-optics concepts) and numerical accuracy in reproducing nonperturbative environmental effects, while using limited amounts of quantum resources. In other words, we are effectively replacing some of the memory requirements needed to analyze quantum resources with an averaging procedure over classical noise, which has the advantage of allowing parallelization. Specifically, we achieve this by first partitioning the effects of the bath into a quantum contribution and a classical contribution to show that the original environment can be simulated with use of a hybrid mixture of colored stochastic noise and ancillary damped quantum modes. The main goal of this method compared with other techniques is to reduce the amount of costly quantum resources. This can be used to analyze the many-body physics of the spin-boson model and, for example, to characterize the hybridization of matter (such as a qubit) with its external electromagnetic environment (as the continuum of a transmission line). ![]() We introduce a new approach to simulate the nonperturbative influence of a continuum of external quantum degrees of freedom on a quantum system.
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