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Effects of thermal modulation on tunneling through a fluctuating barrier in presence of bichromatic electromagnetic field
Author(s) -
Saha Aparna,
Sarkar Pranab
Publication year - 2005
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.20516
Subject(s) - quantum tunnelling , electric field , condensed matter physics , bistability , saturation (graph theory) , rectangular potential barrier , physics , thermal , electromagnetic field , constant (computer programming) , field (mathematics) , chemistry , quantum mechanics , thermodynamics , mathematics , combinatorics , computer science , pure mathematics , programming language
The effects of thermal modulation on the tunneling dynamics of a particle moving in a bistable potential with a fluctuating barrier in the presence of bichromatic electromagnetic field are examined. This study brings to light various interesting features. While rate constant increases steadily with increasing fluctuation strength, a stochastic resonance‐like behavior is exhibited when tunneling rate is plotted as a function of barrier fluctuation frequency. The tunneling rate constant decreases with the increase in the differences of the strength of the two electric fields; on the other hand, it displays a maxima when plotted as a function of the ratio of the frequencies of the two fields. When the rate constant is plotted as a function of temperature, it increases and eventually settles down to a saturation value. We have also studied the effect of the phase difference between the two electric fields on the tunneling behavior in the presence of thermal modulation. © 2005 Wiley Periodicals, Inc. Int J Quantum Chem, 2005