New treatment of quantum metastability

Antonio Defendi, Marco Roncadelli

Han Pu, N. P. Bigelow

We present a new theoretical treatment of the collective excitation spectrum of a two-species Bose-Einstein condensate confined in a magnetic trap. We show that the interspecies interaction significantly modifies the excitation spectrum and gives rise to a rich set of new phenomena. We identify a novel metastable state of the double condensate and show that under external perturbation there can be a macroscopic quantum transition between this metastable state and the true ground state of the double condensate system.

R. Holman, João P. Silva, D. Boyanovsky +2 more

Sergei Sit’Ko

Quantum Medicine is the medical application of the new notions about the nature of life, which are given by Physics of the Alive. In accordance with these notions any free functioning alive object sites on the fourth step of the nature quantum ladder, i. e. one is the whole macroscopic quantum mechanics entity. In the scope of this approach "the healthy organism" is associated with the ground state of the alive in its potential "well" and disease as a metastable state. The standard resonance discharge of metastable state to the ground one, which is usually realized on three previous steps of quantum ladder (nuclear, atomic and molecular) in case of the alive, conforms to the treatment with the technologies of the microwave resonance therapy (MRT).

Seiji Miyashita

Bjarne Vestergaard, Juha Javanainen

Recent numerical work has demonstrated how one of the bistable states of a driven, damped, anharmonic classical oscillator is metastable in the corresponding quantum oscillator [D. Enzer and G. Gabrielse, Phys. Rev. Lett. 78, 1211 (1997)]. Based on an analysis of the classical oscillator, we present a simple analytical treatment of the quantum oscillator. Calculated fluctuations in the quantum observables and the estimated decay rate of the metastable state are in an excellent agreement with the numerical results of Enzer and Gabrielse.