Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/105951
Title: | Coherent superposition of current flows in an atomtronic quantum interference device | Authors: | Aghamalyan, Davit Cominotti, Marco Rizzi, Matteo Rossini, Davide Hekking, Frank Minguzzi, Anna Kwek, Leong-Chuan Amico, Luigi |
Keywords: | DRNTU::Science::Physics::Atomic physics | Issue Date: | 2015 | Source: | Aghamalyan, D., Cominotti, M., Rizzi, M., Rossini, D., Hekking, F., Minguzzi, A., et al. (2015). Coherent superposition of current flows in an atomtronic quantum interference device. New Journal of Physics, 17, 045023-. | Series/Report no.: | New Journal of Physics | Abstract: | We consider a correlated Bose gas tightly confined into a ring shaped lattice, in the presence of an artificial gauge potential inducing a persistent current through it. A weak link painted on the ring acts as a source of coherent back-scattering for the propagating gas, interfering with the forward scattered current. This system defines an atomic counterpart of the rf-SQUID: the atomtronics quantum interference device. The goal of the present study is to corroborate the emergence of an effective two-level system in such a setup and to assess its quality, in terms of its inner resolution and its separation from the rest of the many-body spectrum, across the different physical regimes. In order to achieve this aim, we examine the dependence of the qubit energy gap on the bosonic density, the interaction strength, and the barrier depth, and we show how the superposition between current states appears in the momentum distribution (time-of-flight) images. A mesoscopic ring lattice with intermediate-to-strong interactions and weak barrier depth is found to be a favorable candidate for setting up, manipulating and probing a qubit in the next generation of atomic experiments. | URI: | https://hdl.handle.net/10356/105951 http://hdl.handle.net/10220/26066 |
ISSN: | 1367-2630 | DOI: | 10.1088/1367-2630/17/4/045023 | Research Centres: | Institute of Advanced Studies | Rights: | Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | IAS Journal Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Coherent superposition of current flows in an atomtronic quantum interference device.pdf | 1.78 MB | Adobe PDF | View/Open |
SCOPUSTM
Citations
5
67
Updated on Mar 22, 2024
Web of ScienceTM
Citations
5
62
Updated on Oct 26, 2023
Page view(s) 20
679
Updated on Mar 28, 2024
Download(s) 20
208
Updated on Mar 28, 2024
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.