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Your search keyword '"Bera, Jayanta"' showing total 2 results
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2 results on '"Bera, Jayanta"'

1. Impurity identification in an ultracold gas of bosons atoms in phase-space.

Author

Jogania, Jagnyaseni, Bera, Jayanta, Nath, Ajay, and Roy, Utpal

Subjects
*QUANTUM measurement, *TEMPERATURE measurements, *BOSONS, *ATOMS, *GASES
Abstract

In recently, we have proposed a scheme to sensitive quantum measurement using ultracold atoms [1]. Most attractive properties of the system, its measurement sensitivity limit is very high due to the quantum nature of the ultracold atoms. Here, we propose a temperature sensitivity measurement of the order of Pico-Kelvin and an another sensitive measurement of purity gas of bosons in phase-space. The impurity in the gases changes the effective mass of the system; this combined mass is the reduced mass. This mass difference will result in relative phase difference which we measured in Wigner phase-space. In this scheme we showed a measurement when mass difference is 2.4 % of actual mass. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Solitary matter waves in a tunable bi-periodic optical lattice with two- and three-body interactions.

Author

Nath, Ajay, Bera, Jayanta, Pathak, Maitri R., and Roy, Utpal

Subjects
*DE-Broglie waves, *OPTICAL lattices, *ATOM-atom collisions, *BOSE-Einstein condensation, *SEPARATION of variables, *NUMERICAL analysis, *ATOMS
Abstract

Using complex Ginzburg–Landau equation, we provide an exact analytical model for realizing cigar-shaped Bose–Einstein condensate trapped in a bi-periodic optical lattices and exponential periodic trap in presence of cubic and quintic atom–atom interactions. The choice of exponential periodic trap provides the complete set of the Fourier harmonics and provides independent control over the disorder by tuning the frustrated depth of the bi-periodic optical lattices. The corresponding equation is solved for a variety of physically relevant scenarios, and the parameters (both trap and nonlinearity) for controlling localization are identified. We also illustrate a novel mechanism for transition from a bi-chromatic lattice to a mono-chromatic lattice and vice versa. A numerical stability analysis for the proposed family of solution is performed using Fourier split-step method and is found stable which makes them suitable for the experimental observation. [ABSTRACT FROM AUTHOR]

Published
2022
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