13 citations · 13 across the 2 of their papers we have counts for
4 papers
Spin dynamics in a dissipative environment: from quantal to classical
J. L. Garcia-Palacios, S. Dattagupta
We address the problem of spin dynamics in the presence of a thermal bath, by solving exactly the appropriate quantum master equations with continued-fraction methods. The crossove…
Comment on "Memory Effects in an Interacting Magnetic Nanoparticle System" by Sun et. al, prl, 91, 167206 (2003)
S. Chakravarty, A. Frydman, M. Bandyopadhyay +2
In this Comment we report a phenomenon identical to that observed in ({Y. Sun, M. B. Salamon, K. Garnier and R. S. Averback, Phys. Rev. Lett. 91, 167206 (2003)}) for systems of NiF…
Quantum Treatment of the Anderson-Hasegawa Model -- Effects of Superexchange and Polarons
Manidipa Mitra, P. A. Sreeram, Sushanta Dattagupta
We revisit the Anderson-Hasegawa double-exchange model and critically examine its exact solution when the core spins are treated quantum mechanically.We show that the quantum effec…
Landau diamagnetism revisited
S. Dattagupta, A. M. Jayannavar, N. Kumar
The problem of diamagnetism, solved by Landau, continues to pose fascinating issues which have relevance even today. These issues relate to inherent quantum nature of the problem,…