Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Tripathi, Vikram"'
The honeycomb Kitaev model describes a $Z_2$ spin liquid with topological order and fractionalized excitations consisting of gapped $\pi$-fluxes and free Majorana fermions. Competing interactions, even when not very strong, are known to destabilize t
Externí odkaz:
http://arxiv.org/abs/2403.20189
Autor:
Kumar, Sanjeev, Tripathi, Vikram
We investigate the fragility of a topologically ordered state, namely, the ground state of a weakly Zeeman perturbed honeycomb Kitaev model to environment induced decoherence effects mimicked by random local projective measurements. Our findings show
Externí odkaz:
http://arxiv.org/abs/2403.07866
Autor:
Das, Jagannath, Tripathi, Vikram
We microscopically derive a lattice abelian mutual Chern-Simons gauge theory for a honeycomb Kitaev model subjected to $(001)$ Zeeman and three-spin scalar spin chirality perturbations. We identify the nature of topological orders, emergent excitatio
Externí odkaz:
http://arxiv.org/abs/2401.12750
Publikováno v:
Phys. Rev. B 108, 085110 (2023)
A variety of analytical approaches have been developed for the study of quantum spin systems in two dimensions, the notable ones being spin-waves, slave boson/fermion parton constructions, and for lattices with one-to-one local correspondence of face
Externí odkaz:
http://arxiv.org/abs/2210.07718
Autor:
Kumar, Aman, Tripathi, Vikram
Publikováno v:
Physical Review B 107, L220406 (2023)
We investigate thermal Hall conductivity $\kappa_{xy}$ of a $J$-$K$ Kitaev-Heisenberg model with a Zeeman field in the $(111)$ direction in the light of the recent debate surrounding the possible re-emergence of Ising topological order (ITO) and half
Externí odkaz:
http://arxiv.org/abs/2208.13708
Publikováno v:
Physical Review B 106, L081120 (2022)
Motivated by the pseudogap-Fermi liquid transition in doped Mott insulators, we examine the excitations of a $t$-$J$ model with random and all-to-all hopping and exchange. The stability of quasiparticles such as spin-1/2 fermions, spin-1 magnons, and
Externí odkaz:
http://arxiv.org/abs/2112.01760
Autor:
Sasmal, Souvik, Saini, Vikas, Bruyant, Nicolas, Mondal, Rajib, Kulkarni, Ruta, Singh, Bahadur, Tripathi, Vikram, Thamizhavel, A.
Quantum oscillations in both linear and Hall resistivities and weak antilocalization (WAL) are barely observed in bulk single crystals. Here we report the transport properties of a CaCuSb single crystal that crystallizes in the hexagonal crystal stru
Externí odkaz:
http://arxiv.org/abs/2111.04996
We propose here a counterdiabatic (CD) strategy for fast preparation of a state with long-range topological order by magnetic field tuning of an initial separable state. For concreteness, we consider the ground state of the honeycomb Kitaev model who
Externí odkaz:
http://arxiv.org/abs/2107.08656
Autor:
Kumar, Sanjeev, Tripathi, Vikram
Publikováno v:
Phys. Rev. B 102, 235147 (2020)
We study the current response of an AC driven dissipative Mott insulator system, a normal quantum dot array, using an analytical Keldysh field theory approach. Deep in the Mott insulator regime, the nonequilibrium steady state (NESS) response resembl
Externí odkaz:
http://arxiv.org/abs/2001.11669
Autor:
Kumar, Aman, Tripathi, Vikram
Publikováno v:
Phys. Rev. B 102, 100401 (2020)
We study the stability of Kitaev quasiparticles in the presence of a perturbing Heisenberg interaction as a Fock space localization phenomenon. We identify parameter regimes where Kitaev states are localized, fractal or delocalized in the Fock space
Externí odkaz:
http://arxiv.org/abs/1910.00030