Appearance of Modulated Spatial Pattern in a Dual-species BEC during Condensate Growth

Laura Halmo; Shai Ronen; John Bohn; Mark Edwards

Appearance of Modulated Spatial Pattern in a Dual-species BEC during Condensate Growth

Laura Halmo
, Shai Ronen
, John Bohn
, Mark Edwards

Biochemistry, Chemistry & Physics

Research output: Contribution to conference › Presentation

Abstract

It has been long known that a dual-species BEC with a sufficiently large repulsive intra-species interaction becomes immiscible. In a recent experiment with Rb85 and Rb87 by the Wieman group at JILA, a complicated pattern of multiple interleaved ``bubbles'' of the the two species has been observed upon the end of evaporative cooling. This observation defies expectations that the ground state should only have a single boundary between the two species. We purpose a model wherein this spatial pattern is formed during condensate growth through a modulation instability mechanism. We model the growth of the condensates with a linear gain term added to the Gross Pitaevskii equation, and obtain qualitatively similar patterns to the experiment. We also predict the conditions which would maximize the number of bubbles.

Original language	American English
State	Published - May 2008
Event	Annual Meeting of the APS Division of Atomic,Molecular,and Optical Physics - Duration: May 1 2008 → …

Conference

Conference	Annual Meeting of the APS Division of Atomic,Molecular,and Optical Physics
Period	05/1/08 → …

Disciplines

Physics

Keywords

GPE
Gross Pitaevskii equation

Cite this

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title = "Appearance of Modulated Spatial Pattern in a Dual-species BEC during Condensate Growth",

abstract = " It has been long known that a dual-species BEC with a sufficiently large repulsive intra-species interaction becomes immiscible. In a recent experiment with Rb85 and Rb87 by the Wieman group at JILA, a complicated pattern of multiple interleaved ``bubbles'' of the the two species has been observed upon the end of evaporative cooling. This observation defies expectations that the ground state should only have a single boundary between the two species. We purpose a model wherein this spatial pattern is formed during condensate growth through a modulation instability mechanism. We model the growth of the condensates with a linear gain term added to the Gross Pitaevskii equation, and obtain qualitatively similar patterns to the experiment. We also predict the conditions which would maximize the number of bubbles.",

keywords = "GPE, Gross Pitaevskii equation",

author = "Laura Halmo and Shai Ronen and John Bohn and Mark Edwards",

note = "Mark Edwards. {"}Appearance of Modulated Spatial Pattern in a Dual-species BEC during Condensate Growth{"} Annual Meeting of the APS Division of Atomic,Molecular,and Optical Physics. State College,Pennsylvania. May. 2008. source:http://meetings.aps.org/Meeting/DAMOP08/Session/L2.110; Annual Meeting of the APS Division of Atomic,Molecular,and Optical Physics ; Conference date: 01-05-2008",

year = "2008",

month = may,

language = "American English",

}

TY - CONF

T1 - Appearance of Modulated Spatial Pattern in a Dual-species BEC during Condensate Growth

AU - Halmo, Laura

AU - Ronen, Shai

AU - Bohn, John

AU - Edwards, Mark

N1 - Mark Edwards. "Appearance of Modulated Spatial Pattern in a Dual-species BEC during Condensate Growth" Annual Meeting of the APS Division of Atomic,Molecular,and Optical Physics. State College,Pennsylvania. May. 2008. source:http://meetings.aps.org/Meeting/DAMOP08/Session/L2.110

PY - 2008/5

Y1 - 2008/5

N2 - It has been long known that a dual-species BEC with a sufficiently large repulsive intra-species interaction becomes immiscible. In a recent experiment with Rb85 and Rb87 by the Wieman group at JILA, a complicated pattern of multiple interleaved ``bubbles'' of the the two species has been observed upon the end of evaporative cooling. This observation defies expectations that the ground state should only have a single boundary between the two species. We purpose a model wherein this spatial pattern is formed during condensate growth through a modulation instability mechanism. We model the growth of the condensates with a linear gain term added to the Gross Pitaevskii equation, and obtain qualitatively similar patterns to the experiment. We also predict the conditions which would maximize the number of bubbles.

AB - It has been long known that a dual-species BEC with a sufficiently large repulsive intra-species interaction becomes immiscible. In a recent experiment with Rb85 and Rb87 by the Wieman group at JILA, a complicated pattern of multiple interleaved ``bubbles'' of the the two species has been observed upon the end of evaporative cooling. This observation defies expectations that the ground state should only have a single boundary between the two species. We purpose a model wherein this spatial pattern is formed during condensate growth through a modulation instability mechanism. We model the growth of the condensates with a linear gain term added to the Gross Pitaevskii equation, and obtain qualitatively similar patterns to the experiment. We also predict the conditions which would maximize the number of bubbles.

KW - GPE

KW - Gross Pitaevskii equation

M3 - Presentation

T2 - Annual Meeting of the APS Division of Atomic,Molecular,and Optical Physics

Y2 - 1 May 2008

ER -

Appearance of Modulated Spatial Pattern in a Dual-species BEC during Condensate Growth

Abstract

Conference

Disciplines

Keywords

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