title: A millikelvin all-fiber cavity optomechanical apparatus for merging with ultra-cold atoms in a hybrid quantum system.
abstract: We describe the construction of an apparatus designed to realize a hybrid quantum system comprised of a cryogenically cooled mechanical oscillator and ultra-cold87Rb atoms coupled via light. The outstanding feature of our instrument is an in situ adjustable asymmetric all-fiber membrane-in-the-middle cavity located inside an ultra-high vacuum dilution refrigerator based cryostat. We show that Bose-Einstein condensates of N=2×106atoms can be produced in less than 20 s and demonstrate a single photon optomechanical coupling strength of g0=2π×9 kHz employing a high-stress Si3N4membrane with a mechanical quality factor Qm>107at a cavity setup temperature of TMiM= 480 mK.
authors.affiliation: Institut für Angewandte Physik, Universität Hamburg, Jungiusstrasse 9-11, 20355 Hamburg, Germany.
authors.forename: H
authors.identifier: 0000000262984071
authors.initials: H
authors.lastname: Zhong
authors.affiliation: Institut für Angewandte Physik, Universität Hamburg, Jungiusstrasse 9-11, 20355 Hamburg, Germany.
authors.forename: G
authors.identifier: 0000000167076905
authors.initials: G
authors.lastname: Fläschner
authors.affiliation: Institut für Angewandte Physik, Universität Hamburg, Jungiusstrasse 9-11, 20355 Hamburg, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Schwarz
authors.affiliation: Institut für Angewandte Physik, Universität Hamburg, Jungiusstrasse 9-11, 20355 Hamburg, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Wiesendanger
authors.affiliation: ZOQ-Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Christoph
authors.affiliation: ZOQ-Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Wagner
authors.affiliation: ZOQ-Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Bick
authors.affiliation: ZOQ-Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Staarmann
authors.affiliation: ZOQ-Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Abeln
authors.affiliation: ZOQ-Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Sengstock
authors.affiliation: ZOQ-Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Becker