Homotopy, symmetry, and non-Hermitian band topology
Non-Hermitian matrices are ubiquitous in the description of nature ranging from classical
dissipative systems, including optical, electrical, and mechanical metamaterials, to scattering …
dissipative systems, including optical, electrical, and mechanical metamaterials, to scattering …
Enhanced eigenvector sensitivity and algebraic classification of sublattice-symmetric exceptional points
Exceptional points (EPs) are degeneracy of non-Hermitian Hamiltonians, at which the
eigenvalues, along with their eigenvectors, coalesce. Their orders are given by the Jordan …
eigenvalues, along with their eigenvectors, coalesce. Their orders are given by the Jordan …
Majorana quasiparticles emergent in Kitaev spin liquid
J Nasu - Progress of Theoretical and Experimental Physics, 2024 - academic.oup.com
This paper reviews the nature of two quasiparticles, the Majorana fermion and vison,
emergent in the Kitaev model, mainly from the theoretical point of view. We demonstrate how …
emergent in the Kitaev model, mainly from the theoretical point of view. We demonstrate how …
Magnetic field effects on the Kitaev model coupled to environment
Open quantum systems display unusual phenomena not seen in closed systems, such as
new topological phases and unconventional phase transitions. An interesting example was …
new topological phases and unconventional phase transitions. An interesting example was …
Spectral evidence for Dirac spinons in a kagome lattice antiferromagnet
Emergent quasiparticles with a Dirac dispersion in condensed matter systems can be
described by the Dirac equation for relativistic electrons, in analogy with Dirac particles in …
described by the Dirac equation for relativistic electrons, in analogy with Dirac particles in …
Non-Hermitian generalizations of the Yao-Lee model augmented by SO (3)-symmetry-breaking terms
I Mandal - arxiv preprint arxiv:2401.08568, 2024 - arxiv.org
We investigate non-Hermitian versions of the Yao-Lee model supplemented by various
kinds of SO (3)-symmetry-breaking terms, preserving the solvability of the model. The parent …
kinds of SO (3)-symmetry-breaking terms, preserving the solvability of the model. The parent …
Dirac quantum spin liquid emerging in a kagome-lattice antiferromagnet
Emerging quasi-particles with Dirac dispersion in condensed matter physics are analogous
to their cousins in high-energy physics in that both of them can be described by the Dirac …
to their cousins in high-energy physics in that both of them can be described by the Dirac …
Disorder and non-Hermiticity in Kitaev spin liquids with a Majorana Fermi surface
We study the effect of disorder on Z 2 quantum spin liquids with a Majorana Fermi line
(respectively a surface in three dimensions), and we show that depending on the …
(respectively a surface in three dimensions), and we show that depending on the …
Entanglement transitions in a periodically driven non-Hermitian Ising chain
T Banerjee, K Sengupta - Physical Review B, 2024 - APS
We study entanglement transitions in a periodically driven Ising chain in the presence of an
imaginary transverse field γ as a function of drive frequency ω D. In the high drive amplitude …
imaginary transverse field γ as a function of drive frequency ω D. In the high drive amplitude …
Role of quantum geometric tensor on wavepacket dynamics in two-dimensional non-Hermitian systems
The quantum geometric tensor (QGT) characterizes the local geometry of quantum states,
and its components directly account for the dynamical effects observed, eg, in condensed …
and its components directly account for the dynamical effects observed, eg, in condensed …