3 papers
cond-mat.mtrl-sci2005
Interacting quantum rotors in oxygen-doped germanium
Hiroyuki Shima, Tsuneyoshi Nakayama
We investigate the interaction effect between oxygen impurities in crystalline germanium on the basis of a quantum rotor model. The dipolar interaction of nearby oxygen impurities…
cond-mat.mes-hall2004
Dielectric anomaly in coupled rotor systems
Hiroyuki Shima, Tsuneyoshi Nakayama
The correlated dynamics of coupled quantum rotors carrying electric dipole moment is theoretically investigated. The energy spectra of coupled rotors as a function of dipolar inter…
quant-ph2004
Orienting coupled quantum rotors by ultrashort laser pulses
Hiroyuki Shima, Tsuneyoshi Nakayama
We point out that the non-adiabatic orientation of quantum rotors, produced by ultrashort laser pulses, is remarkably enhanced by introducing dipolar interaction between the rotors…