804 citations · 3.3k across the 158 of their papers we have counts for
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Construction of Exact Ermakov-Pinney Solutions and Time-Dependent Quantum Oscillators
Sang Pyo Kim, Won Kim
The harmonic oscillator with a time-dependent frequency has a family of linear quantum invariants for the time-dependent Schrödinger equation, which are determined by any two indep…
Matrix Operator Approach to the Quantum Evolution Operator and the Geometric Phase
Sang Pyo Kim, Jewan Kim, Kwang Sup Soh
The Moody-Shapere-Wilczek's adiabatic effective Hamiltonian and Lagrangian method is developed further into the matrix effective Hamiltonian (MEH) and Lagrangian (MEL) approach to…
Information-Theoretic Uncertainty Relation and Random-Phase Entropy
Kyoung Kon Kim, Sang Pyo Kim, Sok Kuh Kang
Dunkel and Trigger [Phys. Rev. A {71}, 052102 (2005)] show that the Leipnik's joint entropy monotonously increases for the initially maximally classical Gaussian wave packet for a…
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…
Method for Solving the Bloch Equation from the Connection with Time-Dependent Oscillator
Sang Pyo Kim
We introduce a novel method to find exact density operators for a spin-1/2 particle in time-dependent magnetic fields by using the one-mode bosonic representation of and th…
Coherent-Squeezed State Representation of Travelling General Gaussian Wave Packets
Sang Pyo Kim
Using the time-dependent annihilation and creation operators, the invariant operators, for a free mass and an oscillator, we find the coherent-squeezed state representation of a tr…