https://doi.org/10.1140/epjd/e2018-80782-x
Regular Article
Effect of dissipative environment on collapses and revivals of a non-linear quantum oscillator
1
Department of Physics, Guru Nanak Dev University,
Amritsar,
Punjab
143005, India
2
Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, PO Manauli,
Punjab
140306, India
a e-mail: arvind@iisermohali.ac.in
Received:
22
December
2017
Received in final form:
18
May
2018
Published online: 7
August
2018
We study the dissipative dynamics of a wave packet passing through two different non-linear media. The effect of dissipation on the phenomenon of collapses and revivals of a wave packet as it evolves in a Kerr-type non-linear medium (represented by the Hamiltonian (a†a)2) is investigated. We find that partial revivals do take place when dissipation values are moderate. For a certain regime of parameters we find a solution where revivals do not die even in the presence of dissipation and the non-linearity appears to compensate for the energy and coherence loss. We consider the next order non-linearity, represented by the Hamiltonian (a†a)3, where we observe the phenomena of super revivals. The effect of dissipation in this case has an additional feature of number dependence for the displaced number states. While our simulations explore the degree to which the phenomena of collapses and revivals degrades in a dissipative environment, we also discovered the presence of a situation where degradation is minimal.
Key words: Quantum Optics
© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2018