Lie–Schwinger Block-Diagonalization and Gapped Quantum Chains
Sign Up to like & getrecommendations! Published in 2018 at "Communications in Mathematical Physics"
DOI: 10.1007/s00220-019-03613-2
Abstract: We study quantum chains whose Hamiltonians are perturbations by bounded interactions of short range of a Hamiltonian that does not couple the degrees of freedom located at different sites of the chain and has a… read more here.
Keywords: quantum chains; diagonalization gapped; schwinger block; block diagonalization ... See more keywords
Free-parafermionic Z(N) and free-fermionic XY quantum chains.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review. E"
DOI: 10.1103/physreve.104.054121
Abstract: The relationship between the eigenspectrum of Ising and XY quantum chains is well known. Although the Ising model has a Z(2) symmetry and the XY model a U(1) symmetry, both models are described in terms… read more here.
Keywords: jordan wigner; model symmetry; free fermionic; quantum chains ... See more keywords