Overlapping Bose-Einstein condensates of Na 23 and Cs 133

Claire Warner; Aden Z. Lam; Niccolò Bigagli; Henry C. Liu; Ian Stevenson; Sebastian Will

doi:10.1103/PhysRevA.104.033302

Overlapping Bose-Einstein condensates of Na 23 and Cs 133

Claire Warner, Aden Z. Lam, Niccolò Bigagli, Henry C. Liu, Ian Stevenson, Sebastian Will

Columbia University

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

Abstract

We report on the creation of dual-species Bose-Einstein condensates (BECs) of Na23 atoms and Cs133 atoms. We demonstrate sympathetic cooling of Cs with Na in a magnetic quadrupole trap and a crossed optical dipole trap, leading to Na BECs with 8(1)×105 atoms and Cs BECs with 3.5(1)×104 atoms. Investigating cross thermalization and lifetimes of the mixture, we find that the Na and Cs BECs are miscible and overlapping, interacting with a moderate interspecies scattering length of 18(4)a0 at 23 G and 29(4)a0 at 894 G and coexisting for tens of seconds. Overlapping condensates of Na and Cs offer possibilities for many-body physics with ultracold bosonic mixtures and constitute an ideal starting point for the creation of ultracold ensembles of NaCs ground-state molecules.

Original language	English
Article number	033302
Journal	Physical Review A
Volume	104
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.104.033302
Publication status	Published - 1 Sept 2021
Externally published	Yes

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title = "Overlapping Bose-Einstein condensates of Na 23 and Cs 133",

abstract = "We report on the creation of dual-species Bose-Einstein condensates (BECs) of Na23 atoms and Cs133 atoms. We demonstrate sympathetic cooling of Cs with Na in a magnetic quadrupole trap and a crossed optical dipole trap, leading to Na BECs with 8(1)×105 atoms and Cs BECs with 3.5(1)×104 atoms. Investigating cross thermalization and lifetimes of the mixture, we find that the Na and Cs BECs are miscible and overlapping, interacting with a moderate interspecies scattering length of 18(4)a0 at 23 G and 29(4)a0 at 894 G and coexisting for tens of seconds. Overlapping condensates of Na and Cs offer possibilities for many-body physics with ultracold bosonic mixtures and constitute an ideal starting point for the creation of ultracold ensembles of NaCs ground-state molecules.",

author = "Claire Warner and Lam, \{Aden Z.\} and Niccol{\`o} Bigagli and Liu, \{Henry C.\} and Ian Stevenson and Sebastian Will",

note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

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doi = "10.1103/PhysRevA.104.033302",

language = "English",

volume = "104",

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TY - JOUR

T1 - Overlapping Bose-Einstein condensates of Na 23 and Cs 133

AU - Warner, Claire

AU - Lam, Aden Z.

AU - Bigagli, Niccolò

AU - Liu, Henry C.

AU - Stevenson, Ian

AU - Will, Sebastian

PY - 2021/9/1

Y1 - 2021/9/1

N2 - We report on the creation of dual-species Bose-Einstein condensates (BECs) of Na23 atoms and Cs133 atoms. We demonstrate sympathetic cooling of Cs with Na in a magnetic quadrupole trap and a crossed optical dipole trap, leading to Na BECs with 8(1)×105 atoms and Cs BECs with 3.5(1)×104 atoms. Investigating cross thermalization and lifetimes of the mixture, we find that the Na and Cs BECs are miscible and overlapping, interacting with a moderate interspecies scattering length of 18(4)a0 at 23 G and 29(4)a0 at 894 G and coexisting for tens of seconds. Overlapping condensates of Na and Cs offer possibilities for many-body physics with ultracold bosonic mixtures and constitute an ideal starting point for the creation of ultracold ensembles of NaCs ground-state molecules.

AB - We report on the creation of dual-species Bose-Einstein condensates (BECs) of Na23 atoms and Cs133 atoms. We demonstrate sympathetic cooling of Cs with Na in a magnetic quadrupole trap and a crossed optical dipole trap, leading to Na BECs with 8(1)×105 atoms and Cs BECs with 3.5(1)×104 atoms. Investigating cross thermalization and lifetimes of the mixture, we find that the Na and Cs BECs are miscible and overlapping, interacting with a moderate interspecies scattering length of 18(4)a0 at 23 G and 29(4)a0 at 894 G and coexisting for tens of seconds. Overlapping condensates of Na and Cs offer possibilities for many-body physics with ultracold bosonic mixtures and constitute an ideal starting point for the creation of ultracold ensembles of NaCs ground-state molecules.

U2 - 10.1103/PhysRevA.104.033302

DO - 10.1103/PhysRevA.104.033302

M3 - Article

AN - SCOPUS:85114602824

SN - 2469-9926

VL - 104

JO - Physical Review A

JF - Physical Review A

IS - 3

M1 - 033302

ER -

Overlapping Bose-Einstein condensates of Na 23 and Cs 133

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