We explore anomalous high-harmonic generation in a model that realizes transition from broken time-reversal symmetry Weyl-semimetal to semi-Dirac regime, i.e. gapless semimetal with dispersion is parabolic one direction and conical the other two. point out intensity of induced high harmonics regime. For Weyl semimetals, we reveal are due excitations at momenta where not strictly linear linearized low-energy theory response harmonic only. Our findings aid experimental characterization Weyl,...

We study a two-terminal Josephson junction with conventional superconductors and normal region Rashba spin-orbit interaction, characterized by two Aharonov-Casher (AC) fluxes. When the superconducting phase difference equals <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>π</a:mi></a:math>, Andreev subgap spectrum may host zero-energy Weyl singularities associated vanishing normal-state reflection eigenvalue. With one of AC fluxes playing role quasimomentum, can be viewed as an...

Abstract We consider the spectral and initial value problem for Lindblad–Gorini–Kossakowski–Sudarshan master equation describing an open quantum system of bosons spins, where bosonic parts Hamiltonian Lindblad jump operators are quadratic linear respectively, while spins couple to via mutually commuting spin operators. Needless say, degrees freedom can be replaced by any set finite-level systems. A simple, yet non-trivial example a single spin-boson model is worked out in some detail.

We explore anomalous high-harmonic generation in a model that realizes transition from broken time-reversal symmetry Weyl semimetal to semi-Dirac regime, i.e., gapless with dispersion is parabolic one direction and conical the other two. point out intensity of induced high harmonics regime. For semimetals, we reveal are due excitations at momenta where not strictly linear linearized low-energy theory response harmonic only. Our findings aid experimental characterizations Weyl, Dirac, semimetals.

We investigate Anomalous High-Harmonic Generation (AHHG) within a model undergoing transition from Weyl semimetal with broken time-reversal symmetry to semi-Dirac regime. The latter represents gapless parabolic dispersion in one direction and conical the other two. highlight broadening of distribution excitations Brillouin zone peaks AHHG response, observed as function parameter governing separation nodes, frequency laser pulse increases. Furthermore, we explain splitting these upon an...

We study a two-terminal Josephson junction with conventional superconductors and normal region Rashba spin-orbit interaction, characterized by two Aharonov-Casher (AC) fluxes. When the superconducting phase difference equals $\pi$, Andreev subgap spectrum may host zero-energy Weyl singularities associated vanishing normal-state reflection eigenvalue. With one of AC fluxes playing role quasimomentum, can be viewed as an artificial one-dimensional chiral topological insulator. Its tuned...

We investigate a minimal model of two-terminal Josephson junction with conventional superconducting (SC) leads and pair interconnected quantum dots in the presence two Aharonov-Casher (AC) fluxes. The Andreev bound state spectrum features Weyl nodes within three-dimensional synthetic Brillouin zone defined space these AC fluxes SC phase difference. aim is to determine location topological charge by probing Berry curvature on closed surfaces that may enclose them. This achieved adiabatically...

We consider the spectral and initial value problem for Lindblad-Gorini-Kossakowski-Sudarshan master equation describing an open quantum system of bosons spins, where bosonic parts Hamiltonian Lindblad jump operators are quadratic linear respectively, while spins couple to via mutually commuting spin operators. Needless say, degrees freedom can be replaced by any set finite-level systems. A simple, yet non-trivial example a single spin-boson model is worked out in some detail.