23 citations · 155 across the 29 of their papers we have counts for
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Dynamical properties of the finite-size Dicke model coupled to a thermal reservoir
Ryosuke Imai, Yoshiya Yamanaka
We investigate the dynamical properties of the finite-size Dicke model coupled to a photon reservoir in the dispersive regime. The system-reservoir coupling in our Hamiltonian incl…
Self-Energy Renormalization for Inhomogeneous Nonequilibrium Systems and Field Expansion via Complete Set of Time-Dependent Wave Functions
Y. Kuwahara, Y. Nakamura, Y. Yamanaka
The renormalization conditions of inhomogeneous systems of a quantum field under an external potential are studied, for both equilibrium and nonequilibrium scenarios and based on T…
From Classical Mechanics with Doubled Degrees of Freedom to Quantum Field Theory for Nonconservative System
Y. Kuwahara, Y. Nakamura, Y. Yamanaka
The -matrix structure of Green's functions is a common feature for the real-time formalisms of quantum field theory under thermal situations, such as the closed time pa…
From superoperator formalism to nonequilibrium Thermo Field Dynamics
Yusuke Nakamura, Yoshiya Yamanaka
Emphasizing that the specification of the representation space or the quasiparticle picture is essential in nonequilibrium quantum field system, we have constructed the unique unpe…
Extension of Nelson's Stochastic Quantization to Finite Temperature Using Thermo Field Dynamics
Keita Kobayashi, Yoshiya Yamanaka
We present an extension of Nelson's stochastic quantum mechanics to finite temperature. Utilizing the formulation of Thermo Field Dynamics (TFD), we can show that Ito's stochastic…
Effects of Inelastic Scattering on Tunneling Time in Generalized Nelson's Quantum Mechanics
Kentaro Imafuku, Ichiro Ohba, Yoshiya Yamanaka
We analyze the effects of inelastic scattering on the tunneling time theoretically, using generalized Nelson's quantum mechanics. This generalization enables us to describe quantum…