122 citations
5 papers · 1 filter
Quantum Entanglement and Teleportation in Higher Dimensional Black Hole Spacetimes
Xian-Hui Ge, Sang Pyo Kim
We study the properties of quantum entanglement and teleportation in the background of stationary and rotating curved space-times with extra dimensions. We show that a maximally en…
Time-dependent Displaced and Squeezed Number States
Sang Pyo Kim
We generalize the wave functions of the displaced and squeezed number states, found by Nieto, to a time-dependent harmonic oscillator with variable mass and frequency. These time-d…
Thermofield Dynamics of Time-Dependent Boson and Fermion Systems
Sang Pyo Kim, F. C. Khanna
We formulate the thermofield dynamics for time-dependent systems by combining the Liouville-von Neumann equation, its invariant operators, and the basic notions of thermofield dyna…
Invariant Operators vs Heisenberg Operators for Time-Dependent Generalized Oscillators
Sang Pyo Kim
We investigate the relation between the invariant operators satisfying the quantum Liouville-von Neumann and the Heisenberg operators satisfying the Heisenberg equation. For time-d…
Exact Quantum-Statistical Dynamics of Time-Dependent Generalized Oscillators
Sang Pyo Kim, Don N. Page
Using linear invariant operators in a constructive way we find the most general thermal density operator and Wigner function for time-dependent generalized oscillators. The general…