Quantum impurities:from mobile Josephson junctions to depletons
| Autor: | Dimitri M. Gangardt, Michael Schecter, Alex Kamenev |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Josephson effect
Phonon FOS: Physical sciences General Physics and Astronomy Semiclassical physics mobile impurity 01 natural sciences 010305 fluids & plasmas Superfluidity Condensed Matter::Superconductivity 0103 physical sciences Bound state 010306 general physics Quantum ultracold atoms Condensed Matter::Quantum Gases Physics Condensed matter physics 1D quantum liquids Dissipation Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Bloch oscillations Quantum Gases (cond-mat.quant-gas) superfluidity Condensed Matter - Quantum Gases |
| Zdroj: | Schecter, M, Gangardt, D M & Kamenev, A 2016, ' Quantum impurities : from mobile Josephson junctions to depletons ', New Journal of Physics, vol. 18, 065002 . https://doi.org/10.1088/1367-2630/18/6/065002 |
| DOI: | 10.1088/1367-2630/18/6/065002 |
| Popis: | We overview the main features of mobile impurities moving in one-dimensional superfluid backgrounds by modeling it as a mobile Josephson junction, which leads naturally to the periodic dispersion of the impurity. The dissipation processes, such as radiative friction and quantum viscosity, are shown to result from the interaction of the collective phase difference with the background phonons. We develop a more realistic depleton model of an impurity-hole bound state that provides a number of exact results interpolating between the semiclassical weakly-interacting picture and the strongly interacting Tonks-Girardeau regime. We also discuss the physics of a trapped impurity, relevant to current experiments with ultra cold atoms. 34 pages, 8 figures. Submitted to the New Journal of Physics Focus Issue "Strongly Interacting Quantum Gases in One Dimension" |
| Databáze: | OpenAIRE |
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