Collisional properties of a dipolar gas of ultracold chromium atoms

Publikation: Beitrag in Buch/Bericht/Sammelwerk/KonferenzbandAufsatz in KonferenzbandForschungPeer-Review

Autorschaft

Externe Organisationen

  • Universität Stuttgart
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Titel des Sammelwerks2003 European Quantum Electronics Conference, EQEC 2003
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers Inc.
Seitenumfang1
ISBN (elektronisch)0780377338, 9780780377332
PublikationsstatusVeröffentlicht - 2003
Extern publiziertJa
VeranstaltungEuropean Quantum Electronics Conference, EQEC 2003 - Munich, Deutschland
Dauer: 22 Juni 200327 Juni 2003

Abstract

Temperature dependence of the cross-section for elastic ground-state collisions of 52Cr- and 50Cr-atoms using the method of cross-dimensional relaxation, respectively is determined. The corresponding absolute values of the scattering length are on the order of 100a0 for 52Cr and 50a0 for 50Cr, respectively. However, to use evaporative cooling to increase the phase space density and achieve Bose-Einstein condensation with chromium atoms, have been limited to values below 10-2. Unusuually high inelastic collisio rates due to dipolar relaxation cause atom loss and heating of the sample. These losses are investigated and found similar magnetic-field-dependent rate coefficients (≈10-11 cm3s @ 50 G offset field) for the two isotopes 50Cr and 52Cr indicating that the strongly enhanced dipolar relaxation is a generic feature of the dipole-dipole interaction. This conclusion is supported by theoretical calculations. To circumvent these losses, an optical dipole trap is currently being set up. Here, chromium can be trapped in the energetically lowest state where dipolar relaxation is absent.

ASJC Scopus Sachgebiete

Zitieren

Collisional properties of a dipolar gas of ultracold chromium atoms. / Hensler, S.; Schmidt, Piet Oliver; Werner, J. et al.
2003 European Quantum Electronics Conference, EQEC 2003. Institute of Electrical and Electronics Engineers Inc., 2003. 1314133.

Publikation: Beitrag in Buch/Bericht/Sammelwerk/KonferenzbandAufsatz in KonferenzbandForschungPeer-Review

Hensler, S, Schmidt, PO, Werner, J, Griesmaier, A, Görlitz, A & Pfau, T 2003, Collisional properties of a dipolar gas of ultracold chromium atoms. in 2003 European Quantum Electronics Conference, EQEC 2003., 1314133, Institute of Electrical and Electronics Engineers Inc., European Quantum Electronics Conference, EQEC 2003, Munich, Deutschland, 22 Juni 2003. https://doi.org/10.1109/EQEC.2003.1314133
Hensler, S., Schmidt, P. O., Werner, J., Griesmaier, A., Görlitz, A., & Pfau, T. (2003). Collisional properties of a dipolar gas of ultracold chromium atoms. In 2003 European Quantum Electronics Conference, EQEC 2003 Artikel 1314133 Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EQEC.2003.1314133
Hensler S, Schmidt PO, Werner J, Griesmaier A, Görlitz A, Pfau T. Collisional properties of a dipolar gas of ultracold chromium atoms. in 2003 European Quantum Electronics Conference, EQEC 2003. Institute of Electrical and Electronics Engineers Inc. 2003. 1314133 doi: 10.1109/EQEC.2003.1314133
Hensler, S. ; Schmidt, Piet Oliver ; Werner, J. et al. / Collisional properties of a dipolar gas of ultracold chromium atoms. 2003 European Quantum Electronics Conference, EQEC 2003. Institute of Electrical and Electronics Engineers Inc., 2003.
Download
@inproceedings{5b23059f1c1f4906b4c0a5752f2374be,
title = "Collisional properties of a dipolar gas of ultracold chromium atoms",
abstract = "Temperature dependence of the cross-section for elastic ground-state collisions of 52Cr- and 50Cr-atoms using the method of cross-dimensional relaxation, respectively is determined. The corresponding absolute values of the scattering length are on the order of 100a0 for 52Cr and 50a0 for 50Cr, respectively. However, to use evaporative cooling to increase the phase space density and achieve Bose-Einstein condensation with chromium atoms, have been limited to values below 10-2. Unusuually high inelastic collisio rates due to dipolar relaxation cause atom loss and heating of the sample. These losses are investigated and found similar magnetic-field-dependent rate coefficients (≈10-11 cm3s @ 50 G offset field) for the two isotopes 50Cr and 52Cr indicating that the strongly enhanced dipolar relaxation is a generic feature of the dipole-dipole interaction. This conclusion is supported by theoretical calculations. To circumvent these losses, an optical dipole trap is currently being set up. Here, chromium can be trapped in the energetically lowest state where dipolar relaxation is absent.",
author = "S. Hensler and Schmidt, {Piet Oliver} and J. Werner and A. Griesmaier and A. G{\"o}rlitz and T. Pfau",
year = "2003",
doi = "10.1109/EQEC.2003.1314133",
language = "English",
booktitle = "2003 European Quantum Electronics Conference, EQEC 2003",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
address = "United States",
note = "European Quantum Electronics Conference, EQEC 2003 ; Conference date: 22-06-2003 Through 27-06-2003",

}

Download

TY - GEN

T1 - Collisional properties of a dipolar gas of ultracold chromium atoms

AU - Hensler, S.

AU - Schmidt, Piet Oliver

AU - Werner, J.

AU - Griesmaier, A.

AU - Görlitz, A.

AU - Pfau, T.

PY - 2003

Y1 - 2003

N2 - Temperature dependence of the cross-section for elastic ground-state collisions of 52Cr- and 50Cr-atoms using the method of cross-dimensional relaxation, respectively is determined. The corresponding absolute values of the scattering length are on the order of 100a0 for 52Cr and 50a0 for 50Cr, respectively. However, to use evaporative cooling to increase the phase space density and achieve Bose-Einstein condensation with chromium atoms, have been limited to values below 10-2. Unusuually high inelastic collisio rates due to dipolar relaxation cause atom loss and heating of the sample. These losses are investigated and found similar magnetic-field-dependent rate coefficients (≈10-11 cm3s @ 50 G offset field) for the two isotopes 50Cr and 52Cr indicating that the strongly enhanced dipolar relaxation is a generic feature of the dipole-dipole interaction. This conclusion is supported by theoretical calculations. To circumvent these losses, an optical dipole trap is currently being set up. Here, chromium can be trapped in the energetically lowest state where dipolar relaxation is absent.

AB - Temperature dependence of the cross-section for elastic ground-state collisions of 52Cr- and 50Cr-atoms using the method of cross-dimensional relaxation, respectively is determined. The corresponding absolute values of the scattering length are on the order of 100a0 for 52Cr and 50a0 for 50Cr, respectively. However, to use evaporative cooling to increase the phase space density and achieve Bose-Einstein condensation with chromium atoms, have been limited to values below 10-2. Unusuually high inelastic collisio rates due to dipolar relaxation cause atom loss and heating of the sample. These losses are investigated and found similar magnetic-field-dependent rate coefficients (≈10-11 cm3s @ 50 G offset field) for the two isotopes 50Cr and 52Cr indicating that the strongly enhanced dipolar relaxation is a generic feature of the dipole-dipole interaction. This conclusion is supported by theoretical calculations. To circumvent these losses, an optical dipole trap is currently being set up. Here, chromium can be trapped in the energetically lowest state where dipolar relaxation is absent.

UR - http://www.scopus.com/inward/record.url?scp=84947219050&partnerID=8YFLogxK

U2 - 10.1109/EQEC.2003.1314133

DO - 10.1109/EQEC.2003.1314133

M3 - Conference contribution

AN - SCOPUS:84947219050

BT - 2003 European Quantum Electronics Conference, EQEC 2003

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - European Quantum Electronics Conference, EQEC 2003

Y2 - 22 June 2003 through 27 June 2003

ER -

Von denselben Autoren