Readout of the atomtronic quantum interference device

A Bose-Einstein condensate confined in ring shaped lattices interrupted by a weak link and pierced by an effective magnetic flux defines the atomic counterpart of the superconducting quantum interference device: the atomtronic quantum interference device (AQUID). In this paper, we report on the dete...

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Main Authors: Haug, Tobias, Tan, Joel, Theng, Mark, Dumke, Rainer, Kwek, Leong-Chuan, Amico, Luigi
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/85242
http://hdl.handle.net/10220/45158
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-852422023-02-28T19:32:06Z Readout of the atomtronic quantum interference device Haug, Tobias Tan, Joel Theng, Mark Dumke, Rainer Kwek, Leong-Chuan Amico, Luigi School of Physical and Mathematical Sciences Institute of Advanced Studies Atomtronic Quantum Interference Device Bose-Hubbard A Bose-Einstein condensate confined in ring shaped lattices interrupted by a weak link and pierced by an effective magnetic flux defines the atomic counterpart of the superconducting quantum interference device: the atomtronic quantum interference device (AQUID). In this paper, we report on the detection of current states in the system through a self-heterodyne protocol. Following the original proposal of the NIST and Paris groups, the ring-condensate many-body wave function interferes with a reference condensate expanding from the center of the ring. We focus on the rf AQUID which realizes effective qubit dynamics. Both the Bose-Hubbard and Gross-Pitaevskii dynamics are studied. For the Bose-Hubbard dynamics, we demonstrate that the self-heterodyne protocol can be applied, but higher-order correlations in the evolution of the interfering condensates are measured to readout of the current states of the system. We study how states with macroscopic quantum coherence can be told apart analyzing the noise in the time of flight of the ring condensate. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2018-07-20T04:39:12Z 2019-12-06T16:00:17Z 2018-07-20T04:39:12Z 2019-12-06T16:00:17Z 2018 Journal Article Haug, T., Tan, J., Theng, M., Dumke, R., Kwek, L.-C., & Amico, L. (2018). Readout of the atomtronic quantum interference device. Physical Review A, 97(1), 013633-. 2469-9926 https://hdl.handle.net/10356/85242 http://hdl.handle.net/10220/45158 10.1103/PhysRevA.97.013633 en Physical Review A © 2018 American Physical Society. This paper was published in Physical Review A and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevA.97.013633]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 12 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Atomtronic Quantum Interference Device
Bose-Hubbard
spellingShingle Atomtronic Quantum Interference Device
Bose-Hubbard
Haug, Tobias
Tan, Joel
Theng, Mark
Dumke, Rainer
Kwek, Leong-Chuan
Amico, Luigi
Readout of the atomtronic quantum interference device
description A Bose-Einstein condensate confined in ring shaped lattices interrupted by a weak link and pierced by an effective magnetic flux defines the atomic counterpart of the superconducting quantum interference device: the atomtronic quantum interference device (AQUID). In this paper, we report on the detection of current states in the system through a self-heterodyne protocol. Following the original proposal of the NIST and Paris groups, the ring-condensate many-body wave function interferes with a reference condensate expanding from the center of the ring. We focus on the rf AQUID which realizes effective qubit dynamics. Both the Bose-Hubbard and Gross-Pitaevskii dynamics are studied. For the Bose-Hubbard dynamics, we demonstrate that the self-heterodyne protocol can be applied, but higher-order correlations in the evolution of the interfering condensates are measured to readout of the current states of the system. We study how states with macroscopic quantum coherence can be told apart analyzing the noise in the time of flight of the ring condensate.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Haug, Tobias
Tan, Joel
Theng, Mark
Dumke, Rainer
Kwek, Leong-Chuan
Amico, Luigi
format Article
author Haug, Tobias
Tan, Joel
Theng, Mark
Dumke, Rainer
Kwek, Leong-Chuan
Amico, Luigi
author_sort Haug, Tobias
title Readout of the atomtronic quantum interference device
title_short Readout of the atomtronic quantum interference device
title_full Readout of the atomtronic quantum interference device
title_fullStr Readout of the atomtronic quantum interference device
title_full_unstemmed Readout of the atomtronic quantum interference device
title_sort readout of the atomtronic quantum interference device
publishDate 2018
url https://hdl.handle.net/10356/85242
http://hdl.handle.net/10220/45158
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