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- Jadavpur UniversityIN38 papers
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14 papers · 1 filter
Acceleration of the Universe in Presence of Tachyonic field
Surajit Chattopadhyay, Ujjal Debnath, Goutami Chattopadhyay
In this letter, we have assumed that the Universe is filled in tachyonic field with potential, which gives the acceleration of the Universe. For certain choice of potential, we hav…
Shell Crossing Singularities in Quasi-Spherical Szekeres Models
Subenoy Chakraborty, Ujjal Debnath
We investigate the occurrence of shell crossing singularities in quasi-spherical Szekeres dust models with or without a cosmological constant. We study the conditions for shell cro…
Quantum Cloning, Bell's Inequality and Teleportation
S. Adhikari, N. Ganguly, Indranil Chakrabarty +1
We analyze a possibility of using the two qubit output state from Buzek-Hillery quantum copying machine (not necessarily universal quantum cloning machine) as a teleportation chann…
Simple model for transport phenomena : Microscopic construction of Maxwell Demon like engine
Jyotipratim Ray Chaudhuri, Sudip Chattopadhyay, Suman Kumar Banik
We present a microscopic Hamiltonian framework to develop Maxwell demon like engine. Our model consists of a equilibrium thermal bath and a non-equilibrium bath; latter generated b…
Junction Conditions and Consequences of Quasi-Spherical Space-Time with Electro-Magnetic Field and Vaidya Matric
Soma Nath, Ujjal Debnath, Subenoy Chakraborty
In this work the junction conditions between the exterior Reissner-Nordstrom-Vaidya space-time with the interior quasi-spherical Szekeres space-time have been studied for analyzing…
Variable Modified Chaplygin Gas and Accelerating Universe
Ujjal Debnath
In this letter, I have proposed a model of variable modified Chaplygin gas and shown its role in accelerating phase of the universe. I have shown that the equation of state of this…