Criticality and Correlations in Cold Atomic Gases

Autor:	Stephan Ritter, Ferdinand Brennecke, Thomas Bourdel, Tobias Donner, Anton Öttl, Tilmann Esslinger, Michael M. Kohl
Rok vydání:	2008
Předmět:	Condensed Matter::Quantum Gases Length scale Physics Phase transition Criticality Condensed matter physics Bose gas Condensation Thermal Measure (mathematics) Critical exponent
Zdroj:	Advances in Solid State Physics ISBN: 9783540743248
DOI:	10.1007/978-3-540-74325-5_7
Popis:	We study the phase transition of Bose—Einstein condensation in a dilute atomic gas very close to the critical temperature. The critical regime we enter is governed by fluctuations extending far beyond the length scale of thermal de-Broglie waves. Using matter-wave interference we measure the correlation length of these critical fluctuations as a function of temperature. From this we determine the critical exponent of the correlation length for a trapped, weakly interacting Bose gas to be v = 0.67 ± 0.13.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4926552f7640282baacff129574dc3e8 https://doi.org/10.1007/978-3-540-74325-5_7 Zobrazit plný text záznamu