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Publications Influence

Supersymmetry in the space-time R × S3

- D. Sen
- Physics
- 1987

Global N = 1 supersymmetry is implemented on the surface of a four-dimensional sphere, in order to obtain a rotationally invariant and infrared-regulated version of such theories. We find that only… Expand

29 4

Spin-S Kitaev model: Classical ground states, order from disorder, and exact correlation functions

- G. Baskaran, D. Sen, R. Shankar
- Physics
- 10 June 2008

In the first part of this paper, we study the spin-S Kitaev model using spin-wave theory. We discover a remarkable geometry of the minimum-energy surface in the N-spin space. The classical ground… Expand

40 3- PDF

Quantum Phase Transitions in Transverse Field Spin Models: From Statistical Physics to Quantum Information

- A. Dutta, G. Aeppli, B. Chakrabarti, U. Divakaran, T. Rosenbaum, D. Sen
- Physics
- 3 December 2010

The transverse field Ising and XY models (the simplest quantum spin models) provide the organising principle for the rich variety of interconnected subjects which are covered in this book. From a… Expand

92 2- PDF

Exact results for quench dynamics and defect production in a two-dimensional model.

- K. Sengupta, D. Sen, S. Mondal
- Physics, Medicine
- Physical review letters
- 9 October 2007

We show that for a d-dimensional model in which a quench with a rate tau(-1) takes the system across a (d-m)-dimensional critical surface, the defect density scales as n approximately… Expand

75 2- PDF

Quantization of the Derivative Nonlinear Schrodinger Equation

- D. Sen
- Physics, Mathematics
- 9 December 1996

We study the quantum mechanics of the derivative nonlinear Schrodinger equation which has appeared in many areas of physics and is known to be classically integrable. We find that the N-body quantum… Expand

3 2- PDF

Generating a second-order topological insulator with multiple corner states by periodic driving

- R. Seshadri, Anirban Dutta, D. Sen
- Physics
- 29 January 2019

We study the effects of periodic driving on a variant of the Bernevig-Hughes-Zhang (BHZ) model defined on a square lattice. In the absence of driving, the model has both topological and… Expand

22 1- PDF

Spin injection into a metal from a topological insulator

- S. Modak, K. Sengupta, D. Sen
- Physics
- 19 March 2012

We study a junction of a topological insulator with a thin two-dimensional nonmagnetic or partially polarized ferromagnetic metallic film deposited on a three-dimensional insulator. We show, by… Expand

15 1- PDF

Transverse Field Spin Models: From Statistical Physics to Quantum Information

- A. Dutta, U. Divakaran, D. Sen, B. Chakrabarti, Thomas F. Rosenbaum, G. Aeppli
- Chemistry, Physics
- 3 December 2010

11 1

Quenching dynamics of a quantum XY spin-1/2 chain in a transverse field

- V. Mukherjee, U. Divakaran, A. Dutta, D. Sen
- Physics
- 19 November 2007

We study the quantum dynamics of a one-dimensional spin-$1/2$ anisotropic XY model in a transverse field when the transverse field or the anisotropic interaction is quenched at a slow but uniform… Expand

28 1

Non-equilibrium Dynamics of Quantum Systems: Order Parameter Evolution, Defect Generation, and Qubit Transfer

- S. Mondal, D. Sen, K. Sengupta
- Physics
- 20 August 2009

The properties of systems near quantum critical points (QCPs) have been studied extensively in recent years [1, 2]. A QCP is a point across which the symmetry of the ground state of a quantum system… Expand

34 1- PDF