Measurement-enhanced determination of BEC phase transitions

Mark G. Bason; Robert Heck; Mario Napolitano; Otto Eliasson; Romain Muller; Aske Thorsen; Wen-Zhuo Zhang; Jan J. Arlt; Jacob F. Sherson

doi:10.1088/1361-6455/aad447

Measurement-enhanced determination of BEC phase transitions

Mark G. Bason, Robert Heck, Mario Napolitano, Otto Eliasson, Romain Muller, Aske Thorsen, Wen-Zhuo Zhang, Jan J. Arlt, Jacob F. Sherson^*

^*Corresponding author for this work

Department of Physics and Astronomy

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

We demonstrate how dispersive atom number measurements during evaporative cooling can be used for enhanced determination of the parameter dependence of the transition to a Bose-Einstein condensate (BEC). In this way shot-to-shot fluctuations in initial conditions are detected and the information extracted per experimental realization is increased. We furthermore calibrate in situ images from dispersive probing of a BEC with corresponding absorption images in time-of-flight. This allows for the determination of the transition point in a single experimental realization by applying multiple dispersive measurements. Finally, we explore the continuous probing of several consecutive phase transition crossings using the periodic addition of a focused 'dimple' potential.

Original language	English
Article number	175301
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	51
Issue	17
Number of pages	9
ISSN	0953-4075
DOIs	https://doi.org/10.1088/1361-6455/aad447
Publication status	Published - 14 Sept 2018

Keywords

Bose-Einstein condensates
Faraday effect
phase transitions
quantum simulation
ultracold quantum gases
phase diagrams
dispersive probing
BOSE-EINSTEIN CONDENSATION
QUANTUM SIMULATION
GAS
TEMPERATURE
IDEAL

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10.1088/1361-6455/aad447

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@article{929ae50c27cb4f39b3353002ff085eb0,

title = "Measurement-enhanced determination of BEC phase transitions",

abstract = "We demonstrate how dispersive atom number measurements during evaporative cooling can be used for enhanced determination of the parameter dependence of the transition to a Bose-Einstein condensate (BEC). In this way shot-to-shot fluctuations in initial conditions are detected and the information extracted per experimental realization is increased. We furthermore calibrate in situ images from dispersive probing of a BEC with corresponding absorption images in time-of-flight. This allows for the determination of the transition point in a single experimental realization by applying multiple dispersive measurements. Finally, we explore the continuous probing of several consecutive phase transition crossings using the periodic addition of a focused 'dimple' potential.",

keywords = "Bose-Einstein condensates, Faraday effect, phase transitions, quantum simulation, ultracold quantum gases, phase diagrams, dispersive probing, BOSE-EINSTEIN CONDENSATION, QUANTUM SIMULATION, GAS, TEMPERATURE, IDEAL",

author = "Bason, {Mark G.} and Robert Heck and Mario Napolitano and Otto Eliasson and Romain Muller and Aske Thorsen and Wen-Zhuo Zhang and Arlt, {Jan J.} and Sherson, {Jacob F.}",

year = "2018",

month = sep,

day = "14",

doi = "10.1088/1361-6455/aad447",

language = "English",

volume = "51",

journal = "Journal of Physics B: Atomic, Molecular and Optical Physics",

issn = "0953-4075",

publisher = "Institute of Physics Publishing Ltd.",

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TY - JOUR

T1 - Measurement-enhanced determination of BEC phase transitions

AU - Bason, Mark G.

AU - Heck, Robert

AU - Napolitano, Mario

AU - Eliasson, Otto

AU - Muller, Romain

AU - Thorsen, Aske

AU - Zhang, Wen-Zhuo

AU - Arlt, Jan J.

AU - Sherson, Jacob F.

PY - 2018/9/14

Y1 - 2018/9/14

N2 - We demonstrate how dispersive atom number measurements during evaporative cooling can be used for enhanced determination of the parameter dependence of the transition to a Bose-Einstein condensate (BEC). In this way shot-to-shot fluctuations in initial conditions are detected and the information extracted per experimental realization is increased. We furthermore calibrate in situ images from dispersive probing of a BEC with corresponding absorption images in time-of-flight. This allows for the determination of the transition point in a single experimental realization by applying multiple dispersive measurements. Finally, we explore the continuous probing of several consecutive phase transition crossings using the periodic addition of a focused 'dimple' potential.

AB - We demonstrate how dispersive atom number measurements during evaporative cooling can be used for enhanced determination of the parameter dependence of the transition to a Bose-Einstein condensate (BEC). In this way shot-to-shot fluctuations in initial conditions are detected and the information extracted per experimental realization is increased. We furthermore calibrate in situ images from dispersive probing of a BEC with corresponding absorption images in time-of-flight. This allows for the determination of the transition point in a single experimental realization by applying multiple dispersive measurements. Finally, we explore the continuous probing of several consecutive phase transition crossings using the periodic addition of a focused 'dimple' potential.

KW - Bose-Einstein condensates

KW - Faraday effect

KW - phase transitions

KW - quantum simulation

KW - ultracold quantum gases

KW - phase diagrams

KW - dispersive probing

KW - BOSE-EINSTEIN CONDENSATION

KW - QUANTUM SIMULATION

KW - GAS

KW - TEMPERATURE

KW - IDEAL

U2 - 10.1088/1361-6455/aad447

DO - 10.1088/1361-6455/aad447

M3 - Journal article

SN - 0953-4075

VL - 51

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

IS - 17

M1 - 175301

ER -

Measurement-enhanced determination of BEC phase transitions

Abstract

Keywords

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