Quantum control of stability of a discrete electron state coupled with a continuum by external oscillating fields

Journal Article · Fri Jul 01 04:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.84.014304· OSTI ID:21596817

Noba, Ken-ichi; Murayama, Keisuke ^[1]

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1. Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531 (Japan)

Numerical and theoretical analysis of electron survival probability is presented for the system where a periodically driven discrete state is coupled with continuum states of the tight-binding model. The stability of the discrete state is examined by analyzing the survival probability in the weak-coupling case. Stable nondecaying states as well as usual unstable decaying states appear in the systems where the oscillating energy of the discrete state and the energy band of the continuum states overlap. Dynamical stable states caused by the energy oscillation are qualitatively explained by an approximate solution of a periodically driven two-level model. The decay is suppressed as a result of vanishing reduced coupling constant at the resonance.

• OSTI ID: 21596817
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 1 Vol. 84; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APPROXIMATIONS
CALCULATION METHODS
CONTROL
COUPLING
COUPLING CONSTANTS
CRYSTAL FIELD
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
OSCILLATIONS
PERIODICITY
PROBABILITY
RESONANCE
SIMULATION
STABILITY
VARIATIONS