102 citations · 1.2k across the 42 of their papers we have counts for
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Complete Boundary Phase Diagram of the Spin- XXZ Chain with Boundary Fields in the Anti-Ferromagnetic Gapped Regime
Parameshwar R. Pasnoori, Yicheng Tang, Junhyun Lee +3
We consider the spin XXZ chain with diagonal boundary fields and solve it exactly using Bethe ansatz in the gapped anti-ferromagnetic regime and obtain the complete p…
Emergent boundary supersymmetry in a one dimensional superconductor
Parameshwar R. Pasnoori, Patrick Azaria, Colin Rylands +1
The interplay between bulk properties and boundary conditions in one-dimensional quantum systems, gives rise to many intriguing phenomena. These include the emergence of zero energ…
Dissipation driven phase transition in the non-Hermitian Kondo model
Pradip Kattel, Abay Zhakenov, Parameshwar R. Pasnoori +2
Non-Hermitian Hamiltonians capture several aspects of open quantum systems, such as dissipation of energy and non-unitary evolution. An example is an optical lattice where the inel…
Spin fractionalization and zero modes in the spin- XXZ chain with boundary fields
Parameshwar R. Pasnoori, Yicheng Tang, Junhyun Lee +3
In this work we argue that the antiferromagnetic spin XXZ chain in the gapped phase with boundary magnetic fields hosts fractional spin at its edges. Us…
Kondo effect in the isotropic Heisenberg spin chain
Pradip Kattel, Parameshwar R. Pasnoori, J. H. Pixley +2
We investigate the boundary effects that arise when spin- impurities interact with the edges of the antiferromagnetic spin- Heisenberg chain through spin…
Boundary Quantum Phase Transitions in the Spin Heisenberg Chain with Boundary Magnetic Fields
Parameshwar R. Pasnoori, Junhyun Lee, J. H. Pixley +2
We consider the spin Heisenberg chain with boundary magnetic fields and analyze it using a combination of Bethe ansatz and density matrix renormalization group (DMRG)…