Exploring the Single-Particle Mobility Edge in a One-Dimensional Quasiperiodic Optical Lattice
| Autor: | L��schen, Henrik P., Scherg, Sebastian, Kohlert, Thomas, Schreiber, Michael, Bordia, Pranjal, Li, Xiao, Sarma, S. Das, Bloch, Immanuel |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Condensed Matter - Strongly Correlated Electrons
Quantum Physics Statistical Mechanics (cond-mat.stat-mech) Strongly Correlated Electrons (cond-mat.str-el) Quantum Gases (cond-mat.quant-gas) FOS: Physical sciences Disordered Systems and Neural Networks (cond-mat.dis-nn) Condensed Matter - Disordered Systems and Neural Networks Quantum Physics (quant-ph) Condensed Matter - Quantum Gases Condensed Matter - Statistical Mechanics |
| Popis: | A single-particle mobility edge (SPME) marks a critical energy separating extended from localized states in a quantum system. In one-dimensional systems with uncorrelated disorder, a SPME cannot exist, since all single-particle states localize for arbitrarily weak disorder strengths. However, if correlations are present in the disorder potential, the localization transition can occur at a finite disorder strength and SPMEs become possible. In this work, we find experimental evidence for the existence of such a SPME in a one-dimensional quasi-periodic optical lattice. Specifically, we find a regime where extended and localized single-particle states coexist, in good agreement with theoretical simulations, which predict a SPME in this regime. |
| Databáze: | OpenAIRE |
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