4 papers · 1 filter
Instanton Approach to Josephson Tunneling between Trapped Condensates
Yunbo Zhang, H. J. W. Müller-Kirsten
An instanton method is proposed to investigate the quantum tunneling between two weakly-linked Bose-Einstein condensates confined in double-well potential traps. We point out some…
Periodic instanton method and macroscopic quantum tunneling between two weakly-linked Bose-Einstein condensates
Yunbo Zhang, H. J. W. Müller-Kirsten
A new method is used to investigate the tunneling between two weakly-linked Bose-Einstein condensates confined in double-well potential traps. The nonlinear interaction between the…
Macroscopic Quantum Coherence in Small Antiferromagnetic Particle and the Quantum Interference Effects
Y. -H. Nie, Y. -B. Zhang, J. -Q. Liang +2
Starting from the Hamiltonian operator of the noncompensated two-sublattice model of a small antiferromagnetic particle, we derive the effective Lagrangian of a biaxial antiferroma…
A condition for first order phase transitions in quantum mechanical tunneling models
H. J. W. Mueller-Kirsten, D. K. Park, J. M. S. Rana
A criterion is derived for the determination of parameter domains of first order phase transitions in quantum mechanical tunneling models. The criterion is tested by application to…