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19951999
most citedOne-Parameter Squeezed Gaussian States of Time-Dependent Harmonic Oscillator and Selection Rule for Vacuum States

37 citations · 46 across the 5 of their papers we have counts for

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gr-qc1999

Entropy Production and Thermodynamic Arrow of Time in a Recollapsing Universe

Sang Pyo Kim

We investigate the thermodynamic arrow of time in a time-symmetrically recollapsing universe by calculating quantum mechanically the entropy production of a massive scalar field. I…

quant-ph1999

One-Parameter Gaussian State of Anharmonic Oscillator: Nonlinear Realization of Bogoliubov Transformation

Jung Kon Kim, Sang Pyo Kim, Kwang-Gi Park

We find a one-parameter Gaussian state for an anharmonic oscillator with quadratic and quartic terms, which depends on the energy expectation value. For the weak coupling constant,…