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On the possible control of tunneling in symmetric triple-well systems: the role of symmetry and driving

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Title On the possible control of tunneling in symmetric triple-well systems: the role of symmetry and driving
 
Creator KAR, S
BHATTACHARYYA, SP
 
Subject Tunneling control
Symmetric triple well potential
Tunneling enhancement and suppression
Symmetry-preserved and symmetry-broken perturbations
Monochromatic and bichromatic driving
GRID HAMILTONIAN METHOD
BOUND-STATE EIGENVALUES
FLUCTUATING BARRIER
LASER FIELD
MULTIPHOTON DISSOCIATION
SCHRODINGER-EQUATION
QUANTUM DYNAMICS
DRIVEN
CHAOS
EIGENFUNCTIONS
 
Description The possibility of controlling tunneling of a quantum particle localized in the central well (M) of a symmetric triple well potential by carefully choosing the driving parameters of a mono or bichromatic field is considered through careful numerical experiments. Conditions for enhancement and suppression of tunneling rate from the middle (M) to the side wells (L, R) are established. The observed behaviour is sought to be analysed by invoking the time-independent Floquet theory to follow the movement of quasi-energy levels as the driving parameters are changed. We demonstrate how the particle can be tunnel-transported from the central to one particular side well by using a mixed symmetry bichromatic field with delay between the applications of the two frequencies.
 
Publisher INDIAN ASSOC CULTIVATION SCIENCE
 
Date 2014-12-28T09:12:22Z
2014-12-28T09:12:22Z
2014
 
Type Article
 
Identifier INDIAN JOURNAL OF PHYSICS, 88(9)885-894
0973-1458
0974-9845
http://dx.doi.org/10.1007/s12648-014-0490-x
http://dspace.library.iitb.ac.in/jspui/handle/100/16256
 
Language English