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Keywords = micromasers

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16 pages, 5131 KB  
Article
Enhancement of Charging Performance of Micromaser Quantum Battery via Classical Driving Field and Optical Parametric Amplifier
by Jia Zuo, Sumei Huang, Li Deng and Aixi Chen
Photonics 2025, 12(3), 177; https://doi.org/10.3390/photonics12030177 - 21 Feb 2025
Viewed by 763
Abstract
In this paper, we propose a scheme where the charging performance of micromaser quantum batteries can be improved. Our physical system includes a quantized cavity field interacting with a series of identical two-level atoms one by one. In order to improve the performance [...] Read more.
In this paper, we propose a scheme where the charging performance of micromaser quantum batteries can be improved. Our physical system includes a quantized cavity field interacting with a series of identical two-level atoms one by one. In order to improve the performance of the battery, two methods are introduced: one is using a controlling field to drive atoms, and the other is placing OPA crystals in the cavity. Under these different methods, we discuss the influence of different parameters on battery capacity. Finally, combining the two methods for charging yields better results than using either of them alone. These protocols are found to be stable and robust, and most of the stored energy in the quantum batteries can be extracted for work. Our scheme has a potential applications in quantum energy storage devices. Full article
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13 pages, 955 KB  
Article
Effects of Squeezing on the Power Broadening and Shifts of Micromaser Lineshapes
by Leonardi Hernández-Sánchez, Irán Ramos-Prieto, Francisco Soto-Eguibar and Héctor Manuel Moya-Cessa
Photonics 2024, 11(4), 371; https://doi.org/10.3390/photonics11040371 - 16 Apr 2024
Cited by 4 | Viewed by 1650
Abstract
AC Stark shifts have an impact on the dynamics of atoms interacting with a near-resonant quantized single-mode cavity field, which is relevant to a single atom micromaser. In this study, we demonstrate that, when the field is in a squeezed coherent state, atomic [...] Read more.
AC Stark shifts have an impact on the dynamics of atoms interacting with a near-resonant quantized single-mode cavity field, which is relevant to a single atom micromaser. In this study, we demonstrate that, when the field is in a squeezed coherent state, atomic lineshapes are highly sensitive to the squeezing parameter. Furthermore, we show that, when considering a superposition of squeezed coherent states with equal amplitude, the displacement of the transition lines depends significantly, not only on the squeezing parameter, but also on its sign. Full article
(This article belongs to the Special Issue Recent Advances and Future Perspectives in Solid-State Lasers)
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14 pages, 599 KB  
Article
Lossy Micromaser Battery: Almost Pure States in the Jaynes–Cummings Regime
by Vahid Shaghaghi, Varinder Singh, Matteo Carrega, Dario Rosa and Giuliano Benenti
Entropy 2023, 25(3), 430; https://doi.org/10.3390/e25030430 - 27 Feb 2023
Cited by 26 | Viewed by 2375
Abstract
We consider a micromaser model of a quantum battery, where the battery is a single mode of the electromagnetic field in a cavity, charged via repeated interactions with a stream of qubits, all prepared in the same non-equilibrium state, either incoherent or coherent, [...] Read more.
We consider a micromaser model of a quantum battery, where the battery is a single mode of the electromagnetic field in a cavity, charged via repeated interactions with a stream of qubits, all prepared in the same non-equilibrium state, either incoherent or coherent, with the matter–field interaction modeled by the Jaynes–Cummings model. We show that the coherent protocol is superior to the incoherent one, in that an effective pure steady state is achieved for generic values of the model parameters. Finally, we supplement the above collision model with cavity losses, described by a Lindblad master equation. We show that battery performances, in terms of stored energy, charging power, and steady-state purity, are slightly degraded up to moderated dissipation rate. Our results show that micromasers are robust and reliable quantum batteries, thus making them a promising model for experimental implementations. Full article
(This article belongs to the Special Issue Quantum Collision Models)
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19 pages, 1147 KB  
Article
Multiatom Quantum Coherences in Micromasers as Fuel for Thermal and Nonthermal Machines
by Ceren B. Dağ, Wolfgang Niedenzu, Özgür E. Müstecaplıoğlu and Gershon Kurizki
Entropy 2016, 18(7), 244; https://doi.org/10.3390/e18070244 - 29 Jun 2016
Cited by 85 | Viewed by 9580
Abstract
In this paper, we address the question: To what extent is the quantum state preparation of multiatom clusters (before they are injected into the microwave cavity) instrumental for determining not only the kind of machine we may operate, but also the quantitative bounds [...] Read more.
In this paper, we address the question: To what extent is the quantum state preparation of multiatom clusters (before they are injected into the microwave cavity) instrumental for determining not only the kind of machine we may operate, but also the quantitative bounds of its performance? Figuratively speaking, if the multiatom cluster is the “crude oil”, the question is: Which preparation of the cluster is the refining process that can deliver a “gasoline” with a “specific octane”? We classify coherences or quantum correlations among the atoms according to their ability to serve as: (i) fuel for nonthermal machines corresponding to atomic states whose coherences displace or squeeze the cavity field, as well as cause its heating; and (ii) fuel that is purely “combustible”, i.e., corresponds to atomic states that only allow for heat and entropy exchange with the field and can energize a proper heat engine. We identify highly promising multiatom states for each kind of fuel and propose viable experimental schemes for their implementation. Full article
(This article belongs to the Special Issue Quantum Thermodynamics)
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