Entropy Exchange in a Mixture of Ultracold Atoms

Anno: 2009

Autori: Catani J., Barontini G., Lamporesi G., Rabatti F., Thalhammer G., Minardi F., Stringari S., Inguscio M.

Affiliazione autori: LENS—European Laboratory for Non-Linear Spectroscopy and Dipartimento di Fisica, Universita di Firenze, via N. Carrara 1, I-50019 Sesto Fiorentino—Firenze, Italy;
CNR-INFM, via G. Sansone 1, I-50019 Sesto Fiorentino—Firenze, Italy;
Dipartimento di Fisica, Universita di Trento and CNR-INFM BEC Center, I-38050 Povo, Trento, Italy

Abstract: We investigate experimentally the entropy transfer between two distinguishable atomic quantum gases at ultralow temperatures. Exploiting a species-selective trapping potential, we are able to control the entropy of one target gas in presence of a second auxiliary gas. With this method, we drive the target gas into the degenerate regime in conditions of controlled temperature by transferring entropy to the auxiliary gas. We envision that our method could be useful both to achieve the low entropies required to realize new quantum phases and to measure the temperature of atoms in deep optical lattices. We verified the thermalization of the two species in a 1D lattice.

Giornale/Rivista: PHYSICAL REVIEW LETTERS

Volume: 103 (14)      Da Pagina: 140401  A: 140401

Maggiori informazioni: This work was supported by MIUR PRIN 2007, Ente CdR in Firenze, CNR under project EuroQUAM DQS, and EU under STREP CHIMONO and NAME-QUAM.
Parole chiavi: 1D lattices; Controlled temperature; Entropy transfer; Low entropy; Optical lattices; Quantum gas; Quantum phasis; Target gas; Thermalization; Trapping potential; Ultra low temperatures; Ultracold atoms, Atoms; Entropy, Gases
DOI: 10.1103/PhysRevLett.103.140401

Citazioni: 124
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-07-07
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