Efficient calculation of open quantum system dynamics and time‐resolved spectroscopy with distributed memory HEOM (DM‐HEOM)
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Computational Chemistry"
DOI: 10.1002/jcc.25354
Abstract: Time‐ and frequency‐resolved optical signals provide insights into the properties of light‐harvesting molecular complexes, including excitation energies, dipole strengths and orientations, as well as in the exciton energy flow through the complex. The hierarchical equations… read more here.
Keywords: heom; system; system dynamics; quantum system ... See more keywords
Divergences in open quantum systems
Sign Up to like & getrecommendations! Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep04(2018)008
Abstract: A bstractWe show that for cubic scalar field theories in five and more spacetime dimensions, and for the T = 0 limit of the Caldeira-Leggett model, the quantum master equation for long-wavelength modes initially unentangled… read more here.
Keywords: open quantum; quantum systems; divergences open;
Open Quantum Random Walks on the Half-Line: The Karlin–McGregor Formula, Path Counting and Foster’s Theorem
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Statistical Physics"
DOI: 10.1007/s10955-017-1876-x
Abstract: In this work we consider open quantum random walks on the non-negative integers. By considering orthogonal matrix polynomials we are able to describe transition probability expressions for classes of walks via a matrix version of… read more here.
Keywords: quantum; karlin mcgregor; quantum random; random walks ... See more keywords
Evolution of quantum correlations in the open quantum systems consisting of two coupled oscillators
Sign Up to like & getrecommendations! Published in 2017 at "Quantum Information Processing"
DOI: 10.1007/s11128-017-1556-4
Abstract: The open quantum systems consisting of coupled and uncoupled asymmetric oscillators are considered with an initial quantum-dot trapped-ion coherent state. The quantum correlations between spatial modes of this trapped ion are examined to find their… read more here.
Keywords: quantum systems; temperature; discord; quantum correlations ... See more keywords
Open quantum random walk in terms of quantum Bernoulli noise
Sign Up to like & getrecommendations! Published in 2018 at "Quantum Information Processing"
DOI: 10.1007/s11128-018-1820-2
Abstract: In this paper, we introduce an open quantum random walk, which we call the QBN-based open walk, by means of quantum Bernoulli noise, and study its properties from a random walk point of view. We… read more here.
Keywords: quantum random; open quantum; walk; random walk ... See more keywords
Quantum Markov semigroups for continuous-time open quantum random walk
Sign Up to like & getrecommendations! Published in 2019 at "Quantum Information Processing"
DOI: 10.1007/s11128-019-2294-6
Abstract: Open quantum random walks in Attal et al. (Phys Lett A 376:1545–1548, 2012) are quantum generalizations of classical Markov chains. In this paper, we firstly consider a problem to construct a quantum Markov semigroup (QMS)… read more here.
Keywords: quantum random; open quantum; quantum; quantum markov ... See more keywords
Perturbation theory for open quantum systems at the steady state
Sign Up to like & getrecommendations! Published in 2018 at "Results in physics"
DOI: 10.1016/j.rinp.2018.06.038
Abstract: Abstract We propose a theoretical method for studying open quantum systems at the steady state within the framework of the perturbation theory. This approach allow us to compute the density operator of the system perturbatively… read more here.
Keywords: quantum; quantum systems; perturbation theory; steady state ... See more keywords
Simulating Open Quantum System Dynamics on NISQ Computers with Generalized Quantum Master Equations.
Sign Up to like & getrecommendations! Published in 2023 at "Journal of chemical theory and computation"
DOI: 10.1021/acs.jctc.3c00316
Abstract: We present a quantum algorithm based on the generalized quantum master equation (GQME) approach to simulate open quantum system dynamics on noisy intermediate-scale quantum (NISQ) computers. This approach overcomes the limitations of the Lindblad equation,… read more here.
Keywords: system; open quantum; quantum; nisq computers ... See more keywords
PsiQuaSP–A library for efficient computation of symmetric open quantum systems
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-16178-8
Abstract: In a recent publication we showed that permutation symmetry reduces the numerical complexity of Lindblad quantum master equations for identical multi-level systems from exponential to polynomial scaling. This is important for open system dynamics including… read more here.
Keywords: quantum; quantum systems; system; multi level ... See more keywords
Coupled activity-current fluctuations in open quantum systems under strong symmetries
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DOI: 10.1088/1367-2630/ac0f19
Abstract: Strong symmetries in open quantum systems lead to broken ergodicity and the emergence of multiple degenerate steady states. From a quantum jump (trajectory) perspective, the appearance of multiple steady states is related to underlying dynamical… read more here.
Keywords: quantum systems; strong symmetries; activity current; symmetry ... See more keywords
Classifying transport behavior via current fluctuations in open quantum systems
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Statistical Mechanics: Theory and Experiment"
DOI: 10.1088/1742-5468/ab02f4
Abstract: There are two standard ways of classifying transport behavior of systems. The first is via time scaling of spread of correlations in the isolated system in thermodynamic limit. The second is via system size scaling… read more here.
Keywords: system; classifying transport; time; open system ... See more keywords