Zobrazeno 1 - 10
of 7 450
pro vyhledávání: '"Density matrix formalism"'
Autor:
Yang, Zhenshan, Liu, Xiaoxiao, Zhang, Xia, Zhang, Xiaoguang, Guo, Yao, Zhu, Xinran, Li, Hefu, Bai, Chenglin
Publikováno v:
In Results in Physics June 2024 61
Autor:
Käding, Christian, Pitschmann, Mario
We provide a description of interacting quantum fields in terms of density matrices for any occupation numbers in Fock space in a momentum basis. As a simple example, we focus on a real scalar field interacting with another real scalar field, and pre
Externí odkaz:
http://arxiv.org/abs/2210.06991
Autor:
Zhenshan Yang, Xiaoxiao Liu, Xia Zhang, Xiaoguang Zhang, Yao Guo, Xinran Zhu, Hefu Li, Chenglin Bai
Publikováno v:
Results in Physics, Vol 61, Iss , Pp 107761- (2024)
We generalize the density-matrix formalism to provide a simple and unified framework for the study of modal dispersion (MD), mode-dependent loss (MDL) and noise in mode-division-multiplexing communication systems. Fundamental concepts and formulas in
Externí odkaz:
https://doaj.org/article/bb36cfd360804443949ddb40dab5f5fc
Autor:
Guo, Yao, Zhang, Xia, Zhang, Xiaoguang, Du, Qiuping, Yang, Zhenshan, Bai, Chenglin, Cao, Minghua
Publikováno v:
In Optics and Laser Technology September 2023 164
Autor:
Assouline, Benjamin, Capua, Amir
Magnetization dynamics described by the Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation can be formulated to have the form of the well-known two-level-system (TLS) equations. Recently, we showed that a DC spin-transfer torque (STT) term in the LL
Externí odkaz:
http://arxiv.org/abs/2110.06138
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Ohlsson, Tommy, Zhou, Shun
Publikováno v:
Phys. Rev. A 103, 022218 (2021)
In the presence of Lindblad decoherence, i.e. dissipative effects in an open quantum system due to interaction with an environment, we examine the transition probabilities between the eigenstates in the two-level quantum system described by non-Hermi
Externí odkaz:
http://arxiv.org/abs/2006.02445
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Hambye, Thomas, Teresi, Daniele
Publikováno v:
Phys. Rev. D 96, 015031 (2017)
We compute in the density-matrix formalism the baryon asymmetry generated by the decay of the Higgs doublet into a right-handed (RH) neutrino and a Standard Model lepton. The emphasis is put on the baryon asymmetry produced by the total lepton-number
Externí odkaz:
http://arxiv.org/abs/1705.00016
Publikováno v:
Eur. Phys. J. B (2017) 90: 97
The density matrix formalism and the equation of motion approach are two semi-analytical methods that can be used to compute the non-equilibrium dynamics of correlated systems. While for a bilinear Hamiltonian both formalisms yield the exact result,
Externí odkaz:
http://arxiv.org/abs/1701.07282