Anomalous Spin-Charge Separation in a Driven Hubbard System
| Autor: | Dieter Jaksch, Hongmin Gao, Jonathan R. Coulthard, Jordi Mur-Petit |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Quantum Physics Spin–charge separation Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Atomic Physics (physics.atom-ph) FOS: Physical sciences General Physics and Astronomy Charge (physics) Fermion 01 natural sciences Physics - Atomic Physics Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Quantum Physics (quant-ph) 010306 general physics 10. No inequality Quantum Spin-½ |
| Zdroj: | Physical Review Letters. 125 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.125.195301 |
| Popis: | Spin-charge separation (SCS) is a striking manifestation of strong correlations in low-dimensional quantum systems, whereby a fermion splits into separate spin and charge excitations that travel at different speeds. Here, we demonstrate that periodic driving enables control over SCS in a Hubbard system near half-filling. In one dimension, we predict analytically an exotic regime where charge travels slower than spin and can even become 'frozen', in agreement with numerical calculations. In two dimensions, the driving slows both charge and spin, and leads to complex interferences between single-particle and pair-hopping processes. arXiv admin note: text overlap with arXiv:2002.02312 |
| Databáze: | OpenAIRE |
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