2 papers
cond-mat.stat-mech2003
Quantum Spin Glass Phase Boundary in (+/-)J Transverse Field Ising Systems
Arnab Das, Amit Dutta, Bikas K. Chakrabarti
Here we study zero temperature quantum phase transition driven by the transverse field for random Ising model on chain and square lattice. We present some analytical result…
cond-mat.str-el2002
Gapless Phase in the XYZ Spin-1/2 Chain in a Magnetic Field and the Quantum ANNNI Chain
Amit Dutta, Diptiman Sen
We study the XYZ spin-1/2 chain placed in a magnetic field pointing along the x-axis. We use bosonization and a renormalization group analysis to show that the model has a non-triv…