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Seal D, Chaudhury P, Ghosh S. Coherent destruction of tunnelling in a symmetrical double well driven by a series of time dependent δ functions. JOURNAL OF PHYSICS A: MATHEMATICAL AND THEORETICAL 2022; 55:425307. [DOI: 10.1088/1751-8121/ac980c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
Abstract
Abstract
It is analytically and numerically shown that the coherent tunnelling between the individual wells of a symmetrical double well potential can be totally suppressed when it is driven by a periodic series of δ function in time, depending on the time period and strength of the δ function. We have applied time dependent perturbation theory to have an understanding over the process. In absence of any kind of perturbation, the average position of the particle makes a sinusoidal oscillation between two wells. With the application of a periodic δ function, the amplitude and the frequency of the oscillation both get modified. In this article we have explored how the frequency and strength of the applied perturbation controls the quantum dynamics of tunnelling and finally, how these parameters drive the system towards a complete stand still situation, which is described as coherent destruction of tunnelling.
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Seal D, Naskar P, Chaudhury P, Ghosh S. Dissociation of HF molecule in position and momentum representation by an optimally controlled polychromatic field: study in the dual space using simulated annealing. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2131645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Dipayan Seal
- Department of Chemistry, University of Calcutta, Kolkata, India
| | - Pulak Naskar
- Department of Chemistry, Mrinalini Datta Mahavidyapith, Kolkata, India
| | | | - Subhasree Ghosh
- Department of Chemistry, Serampore College, Hoogly, Serampore, India
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Talukder S, Seal D, Naskar P, Chaudhury P, Ghosh S. A two state model study of photo‐detachment dynamics driven by an optimally designed polychromatic field: A simulated annealing based optimisation. INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY 2021; 121. [DOI: 10.1002/qua.26676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 03/30/2021] [Indexed: 07/19/2023]
Affiliation(s)
- Srijeeta Talukder
- School of Chemical Sciences Indian Association for the Cultivation of Science Kolkata India
| | - Dipayan Seal
- Department of Chemistry University of Calcutta Kolkata India
| | - Pulak Naskar
- Department of Chemistry Mrinalini Datta Mahavidyapith Kolkata India
| | | | - Subhasree Ghosh
- Department of Chemistry Serampore College Serampore West Bengal India
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Naskar P, Talukder S, Ghosh S, Chaudhury P. Controlling the isomerization dynamics of iodide acetonitrile dimer complex by optimally designed electromagnetic field: A wave packet based approach. INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY 2019; 119:e25927. [DOI: 10.1002/qua.25927] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
Affiliation(s)
- Pulak Naskar
- Department of ChemistryUniversity of Calcutta Kolkata India
| | - Srijeeta Talukder
- School of Chemical SciencesIndian Association for the Cultivation of Science Kolkata India
| | - Subhasree Ghosh
- Department of ChemistrySerampore College Serampore West Bengal India
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Naskar P, Talukder S, Chaudhury P, Ghosh S. The effect of stochastic barrier fluctuation on semiclassical transmission probability and Shannon entropy of a symmetric double well potential. INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY 2018; 118:e25667. [DOI: 10.1002/qua.25667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
Affiliation(s)
- Pulak Naskar
- Department of Chemistry; University of Calcutta, 92 A P C Road; Kolkata 700 009 India
| | - Srijeeta Talukder
- Department of Physical Chemistry; Indian Association for the Cultivation of Science, Jadavpur; Kolkata 700 032 India
| | - Pinaki Chaudhury
- Department of Chemistry; University of Calcutta, 92 A P C Road; Kolkata 700 009 India
| | - Subhasree Ghosh
- Department of Chemistry; Serampore College; Serampore, Hooghly, West Bengal 712201 India
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Talukder S, Chaudhury P, Adhikari S. Selective bond dissociation of HOD molecule by optimally designed polychromatic IR+UV pulse: a genetic-algorithm-based study. Mol Phys 2017. [DOI: 10.1080/00268976.2016.1277591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Srijeeta Talukder
- Department of Physical Chemistry, Indian Association for the Cultivation of Science , Jadavpur, Kolkata, India
| | - Pinaki Chaudhury
- Department of Chemistry, University of Calcutta , Kolkata, India
| | - Satrajit Adhikari
- Department of Physical Chemistry, Indian Association for the Cultivation of Science , Jadavpur, Kolkata, India
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Talukder S, Chaudhury P, Ghosh S. Simulated annealing-based optimal control over tunneling process through SDWP and Eckart barrier: A momentum basis representation. INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY 2017; 117:e25388. [DOI: 10.1002/qua.25388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
Affiliation(s)
- Srijeeta Talukder
- Department of Physical Chemistry; Indian Association for the Cultivation of Science; Jadavpur India
| | - Pinaki Chaudhury
- Department of Chemistry; University of Calcutta; 92 A P C Road Kolkata 700 009 India
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