Measurement of the zero crossing in a Feshbach resonance of fermionic [Formula Presented]

K. M. O’Hara; S. L. Hemmer; S. R. Granade; M. E. Gehm; J. E. Thomas; V. Venturi; E. Tiesinga; C. J. Williams

doi:10.1103/PhysRevA.66.041401

Measurement of the zero crossing in a Feshbach resonance of fermionic [Formula Presented]

K. M. O’Hara, S. L. Hemmer, S. R. Granade, M. E. Gehm, J. E. Thomas, V. Venturi, E. Tiesinga, C. J. Williams

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We measure a zero crossing in the scattering length of a mixture of the two lowest hyperfine states of [Formula Presented] To locate the zero crossing, we monitor the decrease in temperature and atom number arising from evaporation in a [Formula Presented] laser trap as a function of magnetic field B. The temperature decrease and atom loss are minimized for [Formula Presented] consistent with no evaporation. We also present preliminary calculations using potentials that have been constrained by the measured zero crossing and locate a broad Feshbach resonance at [Formula Presented] in agreement with previous theoretical predictions. In addition, our theoretical model predicts a second and much narrower Feshbach resonance near 55 mT. 5555 2002 The American Physical Society.

Original language	English (US)
Pages (from-to)	4
Number of pages	1
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	66
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevA.66.041401
State	Published - 2002

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.66.041401

Cite this

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title = "Measurement of the zero crossing in a Feshbach resonance of fermionic [Formula Presented]",

abstract = "We measure a zero crossing in the scattering length of a mixture of the two lowest hyperfine states of [Formula Presented] To locate the zero crossing, we monitor the decrease in temperature and atom number arising from evaporation in a [Formula Presented] laser trap as a function of magnetic field B. The temperature decrease and atom loss are minimized for [Formula Presented] consistent with no evaporation. We also present preliminary calculations using potentials that have been constrained by the measured zero crossing and locate a broad Feshbach resonance at [Formula Presented] in agreement with previous theoretical predictions. In addition, our theoretical model predicts a second and much narrower Feshbach resonance near 55 mT. 5555 2002 The American Physical Society.",

author = "O{\textquoteright}Hara, {K. M.} and Hemmer, {S. L.} and Granade, {S. R.} and Gehm, {M. E.} and Thomas, {J. E.} and V. Venturi and E. Tiesinga and Williams, {C. J.}",

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doi = "10.1103/PhysRevA.66.041401",

language = "English (US)",

volume = "66",

pages = "4",

journal = "Physical Review A - Atomic, Molecular, and Optical Physics",

issn = "1050-2947",

publisher = "American Physical Society",

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TY - JOUR

T1 - Measurement of the zero crossing in a Feshbach resonance of fermionic [Formula Presented]

AU - O’Hara, K. M.

AU - Hemmer, S. L.

AU - Granade, S. R.

AU - Gehm, M. E.

AU - Thomas, J. E.

AU - Venturi, V.

AU - Tiesinga, E.

AU - Williams, C. J.

PY - 2002

Y1 - 2002

N2 - We measure a zero crossing in the scattering length of a mixture of the two lowest hyperfine states of [Formula Presented] To locate the zero crossing, we monitor the decrease in temperature and atom number arising from evaporation in a [Formula Presented] laser trap as a function of magnetic field B. The temperature decrease and atom loss are minimized for [Formula Presented] consistent with no evaporation. We also present preliminary calculations using potentials that have been constrained by the measured zero crossing and locate a broad Feshbach resonance at [Formula Presented] in agreement with previous theoretical predictions. In addition, our theoretical model predicts a second and much narrower Feshbach resonance near 55 mT. 5555 2002 The American Physical Society.

AB - We measure a zero crossing in the scattering length of a mixture of the two lowest hyperfine states of [Formula Presented] To locate the zero crossing, we monitor the decrease in temperature and atom number arising from evaporation in a [Formula Presented] laser trap as a function of magnetic field B. The temperature decrease and atom loss are minimized for [Formula Presented] consistent with no evaporation. We also present preliminary calculations using potentials that have been constrained by the measured zero crossing and locate a broad Feshbach resonance at [Formula Presented] in agreement with previous theoretical predictions. In addition, our theoretical model predicts a second and much narrower Feshbach resonance near 55 mT. 5555 2002 The American Physical Society.

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JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

IS - 4

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Measurement of the zero crossing in a Feshbach resonance of fermionic [Formula Presented]

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