Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Sardar, Gopal"'
Autor:
Majhi, Abhishek, Sardar, Gopal
Publikováno v:
Pramana 97(2023)1, 26
In his sixth problem, Hilbert called for an axiomatic approach to theoretical physics with an aim to achieve precision and rigour in scientific reasoning, where logic and language (semantics) of physics play the pivotal role. It is from such a point
Externí odkaz:
http://arxiv.org/abs/2301.06327
Publikováno v:
Phys.Dark Univ. 37 (2022) 101087
The present work deals with cosmological solutions in $f(R,T)$ gravity theory for perfect fluid with constant equation of state ($\omega$). For a viable cosmological solution $\omega$ is restricted to $\omega<\dfrac{1}{3}$. Also depending on the sign
Externí odkaz:
http://arxiv.org/abs/2209.01415
Publikováno v:
A&A 639, A44 (2020)
Large scale solar eruptions significantly impact space weather and damages space-based human infrastructures. It is necessary to predict large scale solar eruptions, which will enable us to protect our vulnerable infrastructures of modern society. We
Externí odkaz:
http://arxiv.org/abs/2003.03878
Autor:
Sardar, Gopal, Banerjee, Subhashish
If an Unruh-DeWitt detector moves with a uniform acceleration in Fock-space vacuum, then the transition rate of the detector is proportional to the thermal spectrum. It is well known that the transition rate of the detector crucially depends on the t
Externí odkaz:
http://arxiv.org/abs/1909.01027
Autor:
Barman, Subhajit, Sardar, Gopal
Publikováno v:
Phys. Rev. D 99, 125015 (2019)
The area dependence of entanglement entropy of a free scalar field is often understood in terms of coupled harmonic oscillators. In Schrodinger quantization, the Gaussian nature of ground state wave-function for these oscillators is sufficient to pro
Externí odkaz:
http://arxiv.org/abs/1906.02921
Autor:
Kajuri, Nirmalya, Sardar, Gopal
In previous work, it had been shown that polymer quantized scalar field theory predicts that even an inertial observer can experience spontaneous excitations. This prediction was shown to hold at low energies. However, in these papers it was assumed
Externí odkaz:
http://arxiv.org/abs/1711.08234
Autor:
Hossain, Golam Mortuza, Sardar, Gopal
The Wightman function i.e. vacuum two-point function, for a massless free scalar field in Fock quantization is inversely proportional to the invariant distance squared between the corresponding spacetime points. Naturally it diverges when these two p
Externí odkaz:
http://arxiv.org/abs/1705.01431
Autor:
Chakraborty, Madhukrishna1 (AUTHOR), Sardar, Gopal1 (AUTHOR), Bose, Akash1 (AUTHOR), Chakraborty, Subenoy1 (AUTHOR) schakraborty.math@gmail.com
Publikováno v:
European Physical Journal C -- Particles & Fields. Sep2023, Vol. 83 Issue 9, p1-14. 14p.
Autor:
Hossain, Golam Mortuza, Sardar, Gopal
If an Unruh-DeWitt detector operates for an infinite proper time along the trajectory of a uniformly accelerated observer in Fock space then induced transition rate of the detector is proportional to Planck distribution. For a realistic detector whic
Externí odkaz:
http://arxiv.org/abs/1606.01663