Special Issue "Cold and Rydberg Atoms for Quantum Technologies"

A special issue of Atoms (ISSN 2218-2004).

Deadline for manuscript submissions: 31 July 2022 | Viewed by 2493

Special Issue Editors

Prof. Dr. J. Tito Mendonca
E-Mail Website
Guest Editor
Instituto Superior Tecnico, University of Lisbon, 1049-001 Lisboa, Portugal
Interests: ultra-cold atoms; collective atomic processes; Rydberg atoms; Bose-Einstein condensation of atoms and photons; quantum plasmas; quantum turbulence; twisted light; time crystals; superfluid light
Dr. Hugo Terças
E-Mail Website
Guest Editor
Instituto Superior Tecnico, University of Lisbon, 1049-001 Lisboa, Portugal
Interests: cold atoms; BEC; polaritons; quantum plasmas; quantum optics; open quantum systems
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Special Issue Information

Dear Colleagues,

Over the last decade, quantum technologies based on the physics of cold atoms have undergone important advances, which are now finding their first important outcomes. Thanks to the large quantum coherence and to the spectacular degree of experimental control of the state-of-the-art platforms, cold atoms are reaching the stage of steering applications that go well beyond the study of the fundamental aspects of atomic and many-body physics. Quantum sensors and interferometers, for example, may surpass the performance of their classical counterparts in terms of precision achieved in current laboratorial conditions. Rydberg atoms, owing to the quantum blockade effect, are compelling candidates for a next generation of quantum computers.

Cold and Rydberg atoms are also becoming very appealing platforms for quantum simulation. Experimental realization of different condensed matter or high-energy models, as well as the replication of a plethora of astrophysical scenarios, are possible due to the development of cold atom-based emulators.

The authors are encouraged to submit their original contributions in the advances of quantum technologies based on cold and ultracold atom platforms (BECs and cold atom traps), and Rydberg atoms and ultracold neutral plasmas. Topics of primary interest covered by this Special Issue include (but are not limited to) classical and quantum simulations in cold atoms and BECs, turbulence and instabilities in magneto-optical traps (MOT), quantum computing with Rydberg atoms, dynamics of Rydberg plasmas, quantum turbulence, quantum atomic impurities, and the Casimir–Polder effect in BECs. The submitted manuscripts should clearly state which problem the work plans to address. Moreover, in case of doubt about the suitability of the work, the authors are encouraged to contact the guest editors prior to submission for informal queries.

Prof. Dr. J. Tito Mendonca
Dr. Hugo Terças
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Atoms is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ultracold atoms
  • magneto-optical traps
  • Rydberg atoms
  • neutral ultracold plasmas
  • Bose– Einstein condensates
  • quantum computing
  • quantum turbulence

Published Papers (3 papers)

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Research

Article
Polarization Spectroscopy Applied to Electromagnetically Induced Transparency in Hot Rydberg Atoms Using a Laguerre–Gaussian Beam
Atoms 2022, 10(2), 58; https://doi.org/10.3390/atoms10020058 - 01 Jun 2022
Viewed by 403
Abstract
In this work, we have applied polarization spectroscopy to study electromagnetically induced transparency involving hot Rb85 Rydberg state in a vapor cell using a Laguerre–Gaussian mode beam. Such spectroscopy technique generates a dispersive signal, which allows a direct measurement of the transition [...] Read more.
In this work, we have applied polarization spectroscopy to study electromagnetically induced transparency involving hot Rb85 Rydberg state in a vapor cell using a Laguerre–Gaussian mode beam. Such spectroscopy technique generates a dispersive signal, which allows a direct measurement of the transition linewidth. Our results show that the measured transition linewidth for a Laguerre–Gaussian mode control beam is narrower than for a Gaussian mode. Besides, it can be well reproduced by a simplified Lindblad master equation model. Full article
(This article belongs to the Special Issue Cold and Rydberg Atoms for Quantum Technologies)
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Article
Quasi-Static and Dynamic Photon Bubbles in Cold Atom Clouds
Atoms 2022, 10(2), 45; https://doi.org/10.3390/atoms10020045 - 30 Apr 2022
Viewed by 634
Abstract
Turbulent radiation flow is ubiquitous in many physical systems where light–matter interaction becomes relevant. Photon bubble instabilities, in particular, have been identified as a possible source of turbulent radiation transport in astrophysical objects such as massive stars and black hole accretion disks. Here, [...] Read more.
Turbulent radiation flow is ubiquitous in many physical systems where light–matter interaction becomes relevant. Photon bubble instabilities, in particular, have been identified as a possible source of turbulent radiation transport in astrophysical objects such as massive stars and black hole accretion disks. Here, we report on the experimental observation of a photon bubble instability in cold atomic gases, in the presence of multiple scattering of light. Two different regimes are identified, namely, the growth and formation of quasi-static structures of depleted atom density and increased photon number, akin to photon bubbles in astrophysical objects, and the destabilisation of these structures in a second regime of photon bubble turbulence. A two-fluid theory is developed to model the coupled atom–photon gas and to describe both the saturation of the instability in the regime of quasi-static bubbles and the low-frequency turbulent phase associated with the growth and collapse of photon bubbles inside the atomic sample. We also employ statistical dimensionality reduction techniques to describe the low-dimensional nature of the turbulent regime. The experimental results reported here, along with the theoretical model we have developed, may shed light on analogue photon bubble instabilities in astrophysical scenarios. Our findings are consistent with recent analyses based on spatially resolved pump–probe measurements. Full article
(This article belongs to the Special Issue Cold and Rydberg Atoms for Quantum Technologies)
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Article
Bernstein–Greene–Kruskal and Case–Van Kampen Modes for the Landau–Vlasov Equation
Atoms 2022, 10(1), 28; https://doi.org/10.3390/atoms10010028 - 01 Mar 2022
Viewed by 1056
Abstract
The one-dimensional Landau–Vlasov equation describing ultracold dilute bosonic gases in the mean-field collisionless regime under strong transverse confinement is analyzed using traditional methods of plasma physics. Time-independent, stationary solutions are found using a similar approach as for the Bernstein–Greene–Kruskal nonlinear plasma modes. Linear [...] Read more.
The one-dimensional Landau–Vlasov equation describing ultracold dilute bosonic gases in the mean-field collisionless regime under strong transverse confinement is analyzed using traditional methods of plasma physics. Time-independent, stationary solutions are found using a similar approach as for the Bernstein–Greene–Kruskal nonlinear plasma modes. Linear stationary waves similar to the Case–Van Kampen plasma normal modes are also shown to be available. The new bosonic solutions have no decaying or growth properties, in the same sense as the analog plasma solutions. The results are applied for real ultracold bosonic gases accessible in contemporary laboratory experiments. Full article
(This article belongs to the Special Issue Cold and Rydberg Atoms for Quantum Technologies)
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