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- W4385698009 abstract "This Letter deals with the broad class of magnetic systems having a single or collective spin S with an energy barrier, such as rare-earth elements and their compounds, single molecule magnets with uniaxial anisotropy, and more generally any other anisotropic quantum system made of single or multiple objects with discrete energy levels. Till now, the reversal of the magnetization of such systems at zero kelvin required making use of quantum tunneling with a significant transverse field or transverse anisotropy term, at resonance. Here, we show that another very simple method exists. It simply consists in the application of a particular sequence of electromagnetic radiations in the ranges of optical or microwave frequencies, depending on the characteristics of the system (spin and anisotropy values for magnetic systems). This produces oscillations of the Rabi type that pass above the barrier, thus extending these oscillations between the two energy wells with mixtures of all the 2S+1 states. In addition to its basic character, this approach opens up new directions of research in quantum information with possible breakthroughs in the current use of multiple quantum bits.Received 27 February 2023Revised 6 May 2023Accepted 26 June 2023DOI:https://doi.org/10.1103/PhysRevLett.131.066701© 2023 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasMagnetismMesoscopicsOptical & microwave phenomenaQuantum interference effectsUltrafast magnetic effectsTechniquesMethods in magnetismSingle impurity modelCondensed Matter, Materials & Applied PhysicsNonlinear DynamicsQuantum Information, Science & Technology" @default.
- W4385698009 created "2023-08-10" @default.
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- W4385698009 date "2023-08-09" @default.
- W4385698009 modified "2023-10-15" @default.
- W4385698009 title "How to Cross an Energy Barrier at Zero Kelvin without Tunneling Effect" @default.
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- W4385698009 doi "https://doi.org/10.1103/physrevlett.131.066701" @default.
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