Atomic and Molecular Physics, and Optics, Physics and Astronomy
24
Scopus Publications
329
Scholar Citations
11
Scholar h-index
11
Scholar i10-index
Scopus Publications
Wave packet dynamics of entangled q-deformed states M Rohith, S Anupama, C Sudheesh Physica Scripta, 2024 This paper explores the wave packet dynamics of a math-type q-deformed field interacting with atoms in a Kerr-type nonlinear medium. The primary focus is on the generation and dynamics of entanglement using the q-deformed field, with the quantification of entanglement accomplished through the von Neumann entropy. Two distinct initial q-deformed states, the q-deformed Fock state, and the q-deformed coherent state, are investigated. The entanglement dynamics reveal characteristics of periodic, quasi-periodic, and chaotic behaviour. Non-deformed initial states display wave packet near revivals and fractional revivals in entanglement dynamics while introducing q-deformation eliminates these features. The q-deformation significantly influences wave packet revivals and fractional revivals, with even a slight introduction causing their disappearance. For large values of q, the entanglement dynamics exhibit a chaotic nature. In the case of a beam splitter-type interaction applied to the initial deformed Fock state, an optimal deformation parameter q is identified, leading to maximum entanglement exceeding the non-deformed scenario.
Janus-faced nature of q-deformed states and estimation of the quadrature moments from optical tomogram S Kannan, C Sudheesh Physica Scripta, 2024 In this work, we derive the optical tomograms of various q-deformed quantum states. We found that irrespective of the deformation parameter q, the Janus-faced nature of the quantum states manifests in their corresponding optical tomograms. A general method to estimate the quadrature moments from the optical tomograms of any q-deformed states is also derived. We also note that this technique can be used in high-precision experiments to observe deviations from the standard quantum mechanical behavior.
Homodyne nonclassical area as a nonclassicality indicator M Rohith, S Kannan, C Sudheesh Journal of Physics B Atomic Molecular and Optical Physics, 2023 We propose a legitimate and easily computable nonclassicality indicator for the states of the electromagnetic field based on the standard deviation in the measurement of the homodyne rotated quadrature operator. The proposed nonclassicality indicator is the nonclassical area projected by the optical tomogram of the quantum state of light on the optical tomographic plane. If the nonclassical area projected by the optical tomogram of a quantum state is greater than zero, the state is nonclassical, and the area is zero for the pure classical state. It is also noted that the nonclassical area of a quantum state increases with an increase in the strength of nonclassicality-inducing operations on the state, such as squeezing, photon addition, etc. We have tested the validity of the nonclassical area measure by calculating the same for certain well-known nonclassical states, and found that essential features of the nonclassicality shown by the states are captured in the nonclassical area. We also show that the nonclassical area is robust against environment-induced decoherence of the states. The nonclassical area projected by the optical tomogram of a quantum state of light is experimentally tractable using the balanced homodyne detection of the quadrature operator of the field, avoiding the reconstruction of the density matrix or the quasiprobability distribution of the state.
Disappearance of squeezing in superposition states and its manifestation in the energy density S Kannan, C Sudheesh Journal of Physics B Atomic Molecular and Optical Physics, 2022 We have classified the superposition of squeezed wavepackets into two kinds and studied their quadrature squeezing. We have shown that the squeezing and higher-order squeezing in the quadrature disappear for the states of the first kind. However, for the second kind, it is possible to achieve the maximum amount of squeezing by adjusting the parameters in the superposition. The absence of squeezing for the superposition states is explained based on the expectation value of the energy density. We find that the expectation value of energy density in quantum wavepackets that shows no squeezing is positive. We have also studied the relationship between energy density and the squeezing in the decoherence dynamics of single and two-mode squeezed states. Our further analysis shows that different types of squeezed states, including states which are not wavepackets, exhibit negative energy density.
Chaos Gated Tunneling Drives Molecular Reactivity in Astrophysical Environments SG Dastider, K Prashant, P Shruti, C Sudheesh, J Cyriac arXiv preprint arXiv:2604.21005 , 2026 2026
25-Year analysis of tropical cirrus clouds: insights from ground and space-based LIDAR observations PR Mol, MV Ratnam, C Sudheesh Atmospheric Research 323, 108158 , 2025 2025 Citations: 1
Wave packet dynamics of entangled q -deformed states M Rohith, S Anupama, C Sudheesh Physica Scripta 99 (7), 075111 , 2024 2024 Citations: 1
Janus-faced nature of q -deformed states and estimation of the quadrature moments from optical tomogram S Kannan, C Sudheesh Physica Scripta 99 (5), 055212 , 2024 2024
Janus-faced tomograms and retrieval of quadrature moments for -deformed states S Kannan, C Sudheesh arXiv preprint arXiv:2308.01763 , 2023 2023
Homodyne nonclassical area as a nonclassicality indicator M Rohith, S Kannan, C Sudheesh Journal of Physics B: Atomic, Molecular and Optical Physics 56 (5), 055501 , 2023 2023 Citations: 5
Quadrature operator eigenstates and energy eigenfunctions of f -deformed oscillators S Anupama, A Pradeep, A Pal, S Chethil Indian Journal of Physics 96 (12), 3559-3566 , 2022 2022
Construction of quantum target space from world-sheet states using quantum state tomography SS Wani, A Shabir, JU Hassan, S Kannan, H Patel, C Sudheesh, M Faizal Annals of Physics 441, 168867 , 2022 2022 Citations: 5
Disappearance of squeezing in superposition states and its manifestation in the energy density S Kannan, C Sudheesh Journal of Physics B: Atomic, Molecular and Optical Physics 55 (9), 095403 , 2022 2022 Citations: 2
Nonlinear dynamics of superposition of wavepackets S Kannan, M Rohith, C Sudheesh The European Physical Journal Plus 137 (4), 471 , 2022 2022 Citations: 1
Squeezing and nonclassicality of q-deformed superposition states S Kannan, C Sudheesh The European Physical Journal D 76 (1), 1-10 , 2022 2022 Citations: 6
Construction of Quantum Target Space from World-Sheet States using Quantum State Tomography S Sajad Wani, A Shabir, JU Hassan, S Kannan, H Patel, C Sudheesh, ... arXiv e-prints, arXiv: 2106.15644 , 2021 2021
Positive energy density leads to no squeezing S Kannan, C Sudheesh arXiv preprint arXiv:2102.03841 , 2021 2021 Citations: 1
Dynamics of observables in a q-deformed harmonic oscillator A Pradeep, S Anupama, C Sudheesh The European Physical Journal D 74 (1), 3 , 2020 2020 Citations: 11
Quadrature operator eigenstates and wavefunctions of -deformed oscillators S Anupama, A Pradeep, A Pal, C Sudheesh arXiv preprint arXiv:1908.01480 , 2019 2019
q-deformed quadrature operator and optical tomogram MP Jayakrishnan, S Dey, M Faizal, C Sudheesh Annals of Physics 385 (October 2017), 584-590 , 2017 2017 Citations: 15
Entanglement dynamics of quantum states generated by a Kerr medium and a beam splitter M Rohith, C Sudheesh, R Rajeev Modern Physics Letters B 30 (02), 1550269 , 2016 2016 Citations: 1
Signatures of entanglement in an optical tomogram M Rohith, C Sudheesh Journal of the Optical Society of America B 33 (2), 126-133 , 2016 2016 Citations: 27
Visualizing revivals and fractional revivals in a Kerr medium using optical tomogram M Rohith, C Sudheesh arXiv preprint arXiv:1507.03724 , 2015 2015 Citations: 43
Visualization of revivals and fractional revivals in optical tomogram M Rohith, C Sudheesh arXiv preprint arXiv:1507.03724 , 2015 2015
MOST CITED SCHOLAR PUBLICATIONS
Complex solitons in Bose–Einstein condensates with two-and three-body interactions U Roy, R Atre, C Sudheesh, CN Kumar, PK Panigrahi Journal of Physics B: Atomic, Molecular and Optical Physics 43 (2), 025003 , 2010 2010 Citations: 52
Visualizing revivals and fractional revivals in a Kerr medium using optical tomogram M Rohith, C Sudheesh arXiv preprint arXiv:1507.03724 , 2015 2015 Citations: 43
Manifestations of wave packet revivals in the moments of observables C Sudheesh, S Lakshmibala, V Balakrishnan Physics Letters A 329 (1-2), 14-21 , 2004 2004 Citations: 38
Squeezing and higher-order squeezing of photon-added coherent states propagating in a Kerr-like medium C Sudheesh, S Lakshmibala, V Balakrishnan Journal of Optics B: Quantum and Semiclassical Optics 7 (12), S728-S735 , 2005 2005 Citations: 29
Signatures of entanglement in an optical tomogram M Rohith, C Sudheesh Journal of the Optical Society of America B 33 (2), 126-133 , 2016 2016 Citations: 27
Wave packet dynamics of entangled two-mode states C Sudheesh, S Lakshmibala, V Balakrishnan Journal of Physics B: Atomic, Molecular and Optical Physics 39 (16), 3345-3359 , 2006 2006 Citations: 25
Wave packet dynamics of photon-added coherent states C Sudheesh, S Lakshmibala, V Balakrishnan EPL (Europhysics Letters) 71 (5), 744-750 , 2005 2005 Citations: 18
q-deformed quadrature operator and optical tomogram MP Jayakrishnan, S Dey, M Faizal, C Sudheesh Annals of Physics 385 (October 2017), 584-590 , 2017 2017 Citations: 15
Dynamics of quantum observables in entangled states C Sudheesh, S Lakshmibala, V Balakrishnan Physics Letters A 373 (32), 2814-2819 , 2009 2009 Citations: 13
Fractional revivals of superposed coherent states M Rohith, C Sudheesh Journal of Physics B: Atomic, Molecular and Optical Physics Email alert … , 2014 2014 Citations: 12
Dynamics of observables in a q-deformed harmonic oscillator A Pradeep, S Anupama, C Sudheesh The European Physical Journal D 74 (1), 3 , 2020 2020 Citations: 11
Recurrence statistics of observables in quantum-mechanical wave packet dynamics C Sudheesh, S Lakshmibala, V Balakrishnan EPL (Europhysics Letters) 90 (5), 50001 , 2010 2010 Citations: 7
Squeezing and nonclassicality of q-deformed superposition states S Kannan, C Sudheesh The European Physical Journal D 76 (1), 1-10 , 2022 2022 Citations: 6
Two-dimensional solitons in periodically modulated double-well potentials C Sudheesh, N Bar-Gill, BA Malomed, G Kurizki Journal of Physics B: Atomic, Molecular and Optical Physics 43 (20), 205304 , 2010 2010 Citations: 6
Homodyne nonclassical area as a nonclassicality indicator M Rohith, S Kannan, C Sudheesh Journal of Physics B: Atomic, Molecular and Optical Physics 56 (5), 055501 , 2023 2023 Citations: 5
Construction of quantum target space from world-sheet states using quantum state tomography SS Wani, A Shabir, JU Hassan, S Kannan, H Patel, C Sudheesh, M Faizal Annals of Physics 441, 168867 , 2022 2022 Citations: 5
Dynamical control of nonlinear symmetry breaking under decoherence N Bar-Gill, G Kurizki, BA Malomed, C Sudheesh Physical Review A—Atomic, Molecular, and Optical Physics 82 (1), 013610 , 2010 2010 Citations: 4
Ehrenfest’s theorem and nonclassical states of light: 2. Dynamics of Nonclassical States of Light LT George, C Sudheesh, S Lakshmibala, V Balakrishnan Resonance 17 (2), 192-211 , 2012 2012 Citations: 3
Disappearance of squeezing in superposition states and its manifestation in the energy density S Kannan, C Sudheesh Journal of Physics B: Atomic, Molecular and Optical Physics 55 (9), 095403 , 2022 2022 Citations: 2
25-Year analysis of tropical cirrus clouds: insights from ground and space-based LIDAR observations PR Mol, MV Ratnam, C Sudheesh Atmospheric Research 323, 108158 , 2025 2025 Citations: 1