My broad area of research interest is theoretical Condensed matter physics, more specifically, electronic charge and spin transport in mesoscopic systems. The systems of interest are nano structures formed by semi-conductors, normal metals, ferromagnetic, antiferromagnetic material etc. These systems being small are vulnerable to thermal fluctuations. Thus achieving controlled behaviour after adopting clever feedback scheme is a challenge for these systems. We are studying stochastic thermodynamics to find the appropriate feedback mechanism.

• Stochastic thermodynamics of macrospin
• Spin transport in nano-systems: GMR, TMR in presence of spin-transfer-torque.
• Quantum dephasing, dissipation in presence of bath and/or dynamical scatterer.
• Many body effect in nano-systems: Fermi-edge singularity in parabolic quantum dot.
• Closed mesoscopic system and quantum chaos.
• Charge transport through phase-coherent system: scattering matrix, phaseshift, density of states, Landauer-B\"uttiker formalism, Fano resonance, evanescent modes and transport.
• Transport through mesoscopic system away from equilibrium.

Apart from these I have worked on time in quantum mechanics: Hartman effect for quantum tunneling and phase delay time, concept of space collapse.

• Rotational Brownian motion: Trajectory, reversibility and stochastic entropy, SB, Debasish Chaudhuri, A.M. Jayannavar, Journal of Statistical Physics 168, 549 (2017)
• Stochastic thermodynamics of macrospins with fluctuating amplitude and direction, SB, Debasish Chaudhuri, A.M. Jayannavar, Phys. Rev. E 92, 032143 (2015)
• Macrospin in external magnetic field: entropy production and fluctuation theorems, SB, Debasish Chaudhuri, A.M. Jayannavar, Journal of Stat. Mech.: Theory and Experiment 2015/P11002
• Feedback control of noise in spin-valves by the spin transfer torque, SB, Arne Brataas and Gerrit Bauer, Applied Physics Letters 98, 083110, 3pages (2011) [Selected in Virtual Journal of Nanoscale Science and Technology 23, Issue 9, (March 7, 2011)].
• Modified Anderson orthogonality catastrophe power law in the presence of shell structure , SB and Martina Hentschel, Phys. Rev. B 83, 035303, 13 pages (2011)
• A comparative study of two phenomenological models of dephasing in series and parallel resistors, SB, Debasish Chaudhuri and Arun M. Jayannavar, Physics Letters A 374, 813, 6pages (2010)
• Renormalization of the dephasing by zero point fluctuations, SB and Doron Cohen, Phys. Rev. B 77, 155438, 8pages (2008)
• Tunneling times through barrier with inelasticity Arya Paul, Arnab Saha, SB and Binayak Dutta-Roy, Eur. Phys. J. D 42, 495, 5pages (2007)
• Phase time for a tunneling particle, SB and A. M. Jayannavar, Int. J. Mod. Phys. B 21, 1681, 25pages (2007)
• The conductance of a multi-mode ballistic ring: beyond Landauer and Kubo , SB, Y. Etzioni and Doron Cohen, Euro Phys. Lett. 76, 739, 6 pages (2006)
• Hartman effect and nonlocality in quantum networks, SB and A. M. Jayannavar, Phys. Lett. A, 335, 266, 8 pages (2005)
• Phase delay time and superluminal propagation in barrier tunneling, SB and A. M. Jayannavar, Indian Journal of Physics, 79 (Proceedings of CMDAYS2004), 953, 5 pages (2005)
• Quantum Current Magnification in a multi-channel mesoscopic ring, SB, P. Singha Deo and A. M. Jayannavar, Phys. Rev. B 70, 075315, 9 pages (2004) [Selected in Virtual Journal of Nanoscale Science and Technology 10, Issue 11, (September 13, 2004)].
• Hartman effect in presence of Aharanov Bohm flux, SB, Raishma Krishnan and A. M. Jayannavar, Solid State Communication 131, 447, 5 pages (2004)
• Understanding the Fano resonance : through toy models, SB, Binayak Dutta-Ray and H.S.Mani, Am. J. Phys., 72, 1501, 7 pages (2004)
• Friedel sum rule for single channel quantum wire, SB and P. Singha Deo, Phys. Rev. B 68, 113301, 4 pages(2003) [Selected in Virtual Journal of Nanoscale Science and Technology 8, Issue 12, (September 22, 2003)].
• Survival of \phi_0/2 periodicity in presence of incoherence in asymmetric Aharonov Bohm rings, C. Benjamin, SB and A. M. Jayannavar, Sol. St. Commun. 124, 331, 4 pages (2002)
• Scattering phase shifts in quasi-one-dimension, P. Singha Deo, SB and Sourin Das, Int. J. Mod. Phys. B, 16, 2247, 11 pages (2002)

H-index: 8 i10 index:7