Results 11 to 20 of about 129,282 (240)
Time-Dependent Approaches to Open Quantum Systems
Frontiers in Physics, 2020 Couplings of a system to other degrees of freedom (that is, environmental degrees of freedom) lead to energy dissipation when the number of environmental degrees of freedom is large enough. Here, we discuss quantal treatments for such energy dissipation.
Masaaki Tokieda, Kouichi Hagino
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Horseshoes in perturbations of Hamiltonian systems with two degrees of freedom [PDF]
Communications in Mathematical Physics, 1981 This paper concerns Hamiltonian and non-Hamiltonian perturbations of integrable two degree of freedom Hamiltonian systems which contain homoclinic and periodic orbits. Our main example concerns perturbations of the uncoupled system consisting of the simple pendulum and the harmonic oscillator.
Holmes, Philip J., Marsden, Jerrold E.
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New Journal of Physics, 2022 Information scrambling, which is the spread of local information through a system’s many-body degrees of freedom, is an intrinsic feature of many-body dynamics.
Bhuvanesh Sundar +3 more
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Polarization-Entangled Two-Photon Absorption in Inhomogeneously Broadened Ensembles
Frontiers in Physics, 2022 Entangled photons are promising candidates for a variety of novel spectroscopic applications. In this paper, we simulate two-photon absorption (TPA) of entangled photons in a molecular ensemble with inhomogeneous broadening. We compare our results with a
Frank Schlawin, Frank Schlawin
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A Hamiltonian system for interacting Benjamin-Feir resonances [PDF]
, 2004 In this paper, we present a model describing the time evolution of two dimensional surface waves in gravity and infinite depth. The model of six interacting modes derives from the normal form of the system describing the dynamics of surface waves and is ...
Benzekri, Tounsia +3 more
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Evolutionary Laws, Initial Conditions, and Gauge Fixing in Constrained Systems [PDF]
, 1994 We describe in detail how to eliminate nonphysical degrees of freedom in the Lagrangian and Hamiltonian formulations of a constrained system. Two important and distinct steps in our method are the fixing of ambiguities in the dynamics and the ...
Castellani L +14 more
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Journal of Applied Mathematics and Physics, 2018 We provide necessary conditions in order that the Hamiltonian systems with Hamiltonian H = 1/2 (p2 1 + p2 2) + V (q1,q2), and one of the following potentials V1 = a0q1 + a1q2/a2q1 + a3q2, V2 = a0q2 1 + a1q1q2 + a2q2 2/a3q2 1 + a4q1q2 + a5q2 2, V3 = a0qn 2 + a1qn−1 2 q1 + ... + anqn 1/qn 1, are integrable in the Liouville sense.
Llibre, Jaume, Valls, Clàudia
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Hamiltonian analysis of Mimetic gravity with higher derivatives
Journal of High Energy Physics, 2021 Two types of mimetic gravity models with higher derivatives of the mimetic field are analyzed in the Hamiltonian formalism. For the first type of mimetic gravity, the Ricci scalar only couples to the mimetic field and we demonstrate the number of degrees
Yunlong Zheng
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Beltrami fields exhibit knots and chaos almost surely
Forum of Mathematics, Sigma, 2023 In this paper, we show that, with probability $1$ , a random Beltrami field exhibits chaotic regions that coexist with invariant tori of complicated topologies. The motivation to consider this question, which arises in the study of stationary Euler
Alberto Enciso +2 more
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Integrability and level crossing manifolds in a quantum Hamiltonian system [PDF]
, 1998 We consider a two-spin model, represented classically by a nonlinear autonomous Hamiltonian system with two degrees of freedom and a nontrivial integrability condition, and quantum mechanically by a real symmetric Hamiltonian matrix with blocks of ...
E. Magyari +12 more
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