Gapless Phase in the XYZ Spin-1/2 Chain in a Magnetic Field and the Quantum ANNNI Chain
| dc.creator | Dutta, Amit | |
| dc.creator | Sen, Diptiman | |
| dc.date | 2002-08-12 | |
| dc.date.accessioned | 2026-07-07T02:46:48Z | |
| dc.date.available | 2026-07-07T02:46:48Z | |
| dc.description | We study the XYZ spin-1/2 chain placed in a magnetic field pointing along the x-axis. We use bosonization and a renormalization group analysis to show that the model has a non-trivial fixed point at a certain value of the XY anisotropy a and the magnetic field h. Hence, there is a line of critical points in the plane (a,h) on which the system is gapless, even though the Hamiltonian has no continuous symmetry. The quantum critical line separates a gapped commensurate phase from a gapped incommensurate phase. Our study explains why the floating phase of the axial next-nearest neighbor Ising (ANNNI) chain in a transverse magnetic field is only a line, as shown by recent numerical studies. | |
| dc.description | Revtex, 5 pages including 1 eps figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0208216 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0208216 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/19771 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Statistical Mechanics | |
| dc.title | Gapless Phase in the XYZ Spin-1/2 Chain in a Magnetic Field and the Quantum ANNNI Chain | |
| dc.type | text |