206 citations · 659 across the 18 of their papers we have counts for
18 papers
Homotopic classification of band structures: Stable, fragile, delicate, and stable representation-protected topology
Piet W. Brouwer, Vatsal Dwivedi
The topological classification of gapped band structures depends on the particular definition of topological equivalence. For translation-invariant systems, stable equivalence is d…
Magnetic Breakdown and Chiral Magnetic Effect at Weyl-Semimetal Tunnel Junctions
Adam Yanis Chaou, Vatsal Dwivedi, Maxim Breitkreiz
We investigate magnetotransport across an interface between two Weyl semimetals whose Weyl nodes project onto different interface momenta. Such an interface generically hosts Fermi…
Partial flux ordering and thermal Majorana metals in (higher-order) spin liquids
Tim Eschmann, Vatsal Dwivedi, Henry F. Legg +2
In frustrated quantum magnetism, chiral spin liquids are a particularly intriguing subset of quantum spin liquids in which the fractionalized parton degrees of freedom form a Chern…
Geometric responses of the Pfaffian state
Vatsal Dwivedi, Semyon Klevtsov
We define and study the Pfaffian state on Riemann surfaces with arbitrary metrics and an inhomogeneous magnetic field and derive its universal transport coefficients. Following a p…
Non-Hermitian systems and topology: A transfer-matrix perspective
Flore K. Kunst, Vatsal Dwivedi
Topological phases of Hermitian systems are known to exhibit intriguing properties such as the presence of robust boundary states and the famed bulk-boundary correspondence. These…
Majorana Corner Modes in a Second-Order Kitaev Spin Liquid
Vatsal Dwivedi, Ciarán Hickey, Tim Eschmann +1
Higher-order topological insulators are distinguished by the existence of topologically protected modes with codimension two or higher. Here, we report the manifestation of a secon…
Phase Space Entanglement Spectrum
Vatsal Dwivedi, Victor Chua
We generalize the position- and momentum-space entanglement cuts to a family of cuts corresponding to regions in the classical phase space. We explicitly compute the entanglement s…
Fermi arc reconstruction at junctions between Weyl semimetals
Vatsal Dwivedi
We analyze junctions between noninteracting fermionic topological phases. A closed-form condition for the existence of localized modes at the interface is derived using the transfe…
Matrix product state representation of quasielectron wave functions
Jonas A. Kjäll, Eddy Ardonne, Vatsal Dwivedi +2
Matrix product state techniques provide a very efficient way to numerically evaluate certain classes of quantum Hall wave functions that can be written as correlators in two-dimens…
Crystalline Kitaev spin liquids
Masahiko G. Yamada, Vatsal Dwivedi, Maria Hermanns
Frustrated magnetic systems exhibit many fascinating phases. Prime among them are quantum spin liquids, where the magnetic moments do not order even at zero temperature. A subclass…
Connecting the dots: Time-reversal symmetric Weyl Semimetals with tunable Fermi arcs
Vatsal Dwivedi, Srinidhi T Ramamurthy
We propose a one-parameter family of noninteracting lattice models for Weyl semimetals with 4 Weyl nodes and tunable Fermi arcs. These 2-band model Hamiltonians are time-reversal s…
Chiral kinetic theory and anomalous hydrodynamics in even spacetime dimensions
Vatsal Dwivedi, Michael Stone
We study the hydrodynamics of a gas of noninteracting Weyl fermions coupled to the electromagnetic field in spacetime dimensions using the chiral kinetic theory, whi…
Of Bulk and Boundaries: Generalized Transfer Matrices for Tight-Binding Models
Vatsal Dwivedi, Victor Chua
We construct a generalized transfer matrix corresponding to noninteracting tight-binding lattice models, which can subsequently be used to compute the bulk bands as well as the edg…
Wigner translations and the observer-dependence of the position of masslesss spinning particles
Michael Stone, Vatsal Dwivedi, Tianci Zhou
The Wigner little group for massless particles is isomorphic to the Euclidean group . Applied to momentum eigenstates, or to infinite plane waves, the Euclidean "Wigne…
Berry Phase, Lorentz Covariance, and Anomalous Velocity for Dirac and Weyl Particles
Michael Stone, Vatsal Dwivedi, Tianci Zhou
We consider the relation between spin and the Berry-phase contribution to the anomalous velocity of massive and massless Dirac particles. We extend the Berry connection that depend…
Classical chiral kinetic theory and anomalies in even space-time dimensions
Vatsal Dwivedi, Michael Stone
We propose a classical action for the motion of massless Weyl fermions in a background gauge field in (2N+1)+1 spacetime dimensions. We use this action to derive the collisionless…
A Classical Version of the Non-Abelian Gauge Anomaly
Michael Stone, Vatsal Dwivedi
We show that a version of the covariant gauge anomaly for a 3+1 dimensional chiral fermion interacting with a non-Abelian gauge field can be obtained from the classical Hamiltonian…
Unusual ferromagnetism in nanoparticles of doped oxides and manganites
Vatsal Dwivedi, A. Taraphder
The observation of unusually large ferromagnetism in the nanoparticles of doped oxides and enhanced ferromagnetic tendencies in manganite nanoparticles have been in focus recently.…