Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Suraka Bhattacharjee"'
Publikováno v:
International Journal of Modern Physics B.
We derive a quantum Langevin equation for a quantum spin in the presence of a magnetic field and coupled to a bath. We have considered two models for the bath: an Ohmic bath model and a non-Markovian Drude bath model with finite memory. The effect of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e1544a563029135d882934f4cd773e3
https://doi.org/10.1142/s021797922450005x
https://doi.org/10.1142/s021797922450005x
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 56:245301
We derive a non-Markovian master equation for a charged particle in a magnetic field coupled to a bath and study decoherence by analyzing the temporal decay of the off-diagonal elements of the reduced density matrix in the position basis. The coheren
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71a9dd1027c6e6cd14a96a0709511891
https://doi.org/10.1088/1751-8121/acd231
https://doi.org/10.1088/1751-8121/acd231
Publikováno v:
Pramana. 96
We use the Quantum Langevin equation as a starting point to study the response function, the position-velocity correlation function and the velocity autocorrelation function of a charged Quantum Brownian particle in the presence of a magnetic field a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f72a268bacbd0f508cfefe2aae4ce227
https://doi.org/10.1007/s12043-022-02295-1
https://doi.org/10.1007/s12043-022-02295-1
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 608:128266
We analyse the long time tails of a charged quantum Brownian particle in a harmonic potential in the presence of a magnetic field using the Quantum Langevin Equation as a starting point. We analyse the long time tails in the position autocorrelation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a4032f0d19b6620407dd3dd5481c83f
https://doi.org/10.1016/j.physa.2022.128266
https://doi.org/10.1016/j.physa.2022.128266
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 605:128010
We study the Quantum Brownian motion of a charged particle moving in a harmonic potential in the presence of an uniform external magnetic field and linearly coupled to an Ohmic bath through momentum variables. We analyse the growth of the mean square
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::958422cd3fe6d2b0e3a22f42eab8de3f
https://doi.org/10.1016/j.physa.2022.128010
https://doi.org/10.1016/j.physa.2022.128010
The interaction between the charge degrees of freedom for itinerant antiferromagnets is investigated in terms of generalized charge stiffness constant corresponding to nearest neighbour t-J model and t1-t2-t3-J model. The low dimensional hole doped a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74048d5ad6bbe7d3edf728cb55ad9058
Autor:
Suraka Bhattacharjee, Ranjan Chaudhury
Publikováno v:
Journal of Low Temperature Physics. 193:21-38
The effective interaction between the itinerant spin degrees of freedom in the paramagnetic phases of hole doped quantum Heisenberg antiferromagnets is investigated theoretically, based on the single-band t-J model on 1D lattice, at zero temperature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92e1e362dbfdcb87b5c076fa436c5e61
https://doi.org/10.1007/s10909-018-1998-9
https://doi.org/10.1007/s10909-018-1998-9
Autor:
Ranjan Chaudhury, Suraka Bhattacharjee
Expressions for generalized charge stiffness constant at zero temperature are derived corresponding to low dimensional hole doped quantum antiferromagnets, describable by the t-J-like models, with a view to understanding fermionic pairing possibiliti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a45df5645d2bcd70d3ada869298b7fa2
Autor:
Ranjan Chaudhury, Suraka Bhattacharjee
The generalized spin stiffness constant for a doped quantum antiferromagnet has been investigated both analytically and numerically as a function of doping concentration at zero temperature, based on the strongly correlated t-J model on two-dimension
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07ba3ba4a7bf6216e8feda6ba6c66969
http://arxiv.org/abs/1510.01428
http://arxiv.org/abs/1510.01428