57 citations · 118 across the 11 of their papers we have counts for
11 papers
Phase diagrams of S=1/2 bilayer Models of SU(2) symmetric antiferromagnets
Fan Zhang, Nisheeta Desai, Wenan Guo +1
We study the phase diagrams of models of bilayers of square lattices antiferromagnets with SU(2) Heisenberg symmetry that have 2, 4, and 6 spin exchanges. We study tw…
Competition between Neel, Haldane nematic, plaquette valence bond solid, and valence bond solid phases in SU(N) analogs of square-lattice antiferromagnets
Souvik Kundu, Nisheeta Desai, Kedar Damle
We use stochastic series expansion (SSE) quantum Monte Carlo (QMC) methods to study the phases and transitions displayed by a class of sign-free designer Hamiltonians for SU() a…
Deconfined pseudocriticality in a model spin-1 quantum antiferromagnet
Vikas Vijigiri, Sumiran Pujari, Nisheeta Desai
Berry phase interference arguments that underlie the theory of deconfined quantum criticality (DQC) for spin- antiferromagnets have also been invoked to allow for cont…
Notes on resummation-based quantum Monte Carlo vis-à-vis sign-problematic Heisenberg models on canonical geometrically frustrated lattices
Nisheeta Desai, Sumiran Pujari
We show here that a direct application of resummation-based quantum Monte Carlo (QMC) -- implemented recently for sign-problem-free SU(2)-symmetric Hamiltonians in the stochastic s…
Melting of three-sublattice order in triangular lattice Ising antiferromagnets: Power-law order, parafermionic multicriticality, and weakly first order transitions
G. Rakala, N. Desai, S. Shivam +1
The nature of the thermal melting process by which triangular-lattice Ising antiferromagnets lose their low-temperature ferrimagnetic three-sublattice order depends on the range of…
Resummation-based updates for Stochastic Series Expansion Quantum Monte Carlo
Nisheeta Desai, Sumiran Pujari
For spin rotational symmetric models with a positive-definite high-temperature expansion of the partition function, a stochastic sampling of the series expansion upon partial resum…
Bilayer Coulomb phase of two dimensional dimer models: Absence of power-law columnar order
Nisheeta Desai, Sumiran Pujari, K. Damle
We study the fully-packed dimer model on the bilayer square lattice with fugacity equal to () for inter-layer (intra-layer) dimers, and intra-layer interaction between n…
Duality and domain wall dynamics in a twisted Kitaev chain
C. M. Morris, Nisheeta Desai, J. Viirok +9
The Ising chain in transverse field is a paradigmatic model for a host of physical phenomena, including spontaneous symmetry breaking, topological defects, quantum criticality, and…
First order phase transitions in the square lattice "easy-plane" J-Q model
Nisheeta Desai, Ribhu K. Kaul
We study the quantum phase transition between the superfluid and valence bond solid in "easy-plane" J-Q models on the square lattice. The Hamiltonian we study is a linear combinati…
Spin- designer hamiltonians and the square lattice Haldane nematic
Nisheeta Desai, Ribhu K. Kaul
We introduce a strategy to write down lattice models of spin rotational symmetric Hamiltonians with arbitrary spin- that are Marshall positive and can be simulated efficiently u…
First-order Néel-cVBS transition in a model square lattice antiferromagnet
Julia Wildeboer, Nisheeta Desai, Jonathan D'Emidio +1
We study the Néel to four-fold columnar valence bond solid (cVBS) quantum phase transition in a sign free square lattice model. This is the same kind of transition that for $…