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Zakka-Bajjani, Eva; Nguyen, François; Lee, Minhyea; Vale, Leila R.; Simmonds, Raymond W.; Aumentado, José |
| Title |
Quantum superposition of a single microwave photon in two different 'colour' states |
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Journal Article |
| Year |
2011 |
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Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
Issue |
8 |
Pages |
599-603 |
| Keywords |
fromIPMRAS |
| Abstract |
Fully controlled coherent coupling of arbitrary harmonic oscillators is an important tool for processing quantum information. Coupling between quantum harmonic oscillators has previously been demonstrated in several physical systems using a two-level system as a mediating element. Direct interaction at the quantum level has only recently been realized by means of resonant coupling between trapped ions. Here we implement a tunable direct coupling between the microwave harmonics of a superconducting resonator by means of parametric frequency conversion. We accomplish this by coupling the mode currents of two harmonics through a superconducting quantum interference device (SQUID) and modulating its flux at the difference (~7GHz) of the harmonic frequencies. We deterministically prepare a single-photon Fock state and coherently manipulate it between multiple modes, effectively controlling it in a superposition of two different 'colours'. This parametric interaction can be described as a beamsplitter-like operation that couples different frequency modes. As such, it could be used to implement linear optical quantum computing protocols on-chip. |
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822 |
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Zhu, J.; Christensen, J.; Jung, J.; Martin-Moreno, L.; Yin, X.; Fok, L.; Zhang, X.; Garcia-Vidal, F. J. |
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A holey-structured metamaterial for acoustic deep-subwavelength imaging |
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Journal Article |
| Year |
2011 |
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Nature Physics |
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Nat. Phys. |
| Volume |
7 |
Issue |
1 |
Pages |
52-55 |
| Keywords |
fromIPMRAS |
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For classical waves such as light or sound, diffraction sets a natural limit on how finely the details of an object can be recorded on its image. Recently, various optical superlenses based on the metamaterials concept have shown the possibility of overcoming the diffraction limit. Similar two-dimensional (2D) acoustic hyperlens designs have also been explored. Here we demonstrate a 3D holey-structured metamaterial that achieves acoustic imaging down to a feature size of λ/50. The evanescent field components of a subwavelength object are efficiently transmitted through the structure as a result of their strong coupling with Fabry-Pérot resonances inside the holey plate. This capability of acoustic imaging at a very deep-subwavelength scale may open the door for a broad range of applications, including medical ultrasonography, underwater sonar and ultrasonic non-destructive evaluation. |
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809 |
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Васильева, И. А.; Компанеец, В. В.; Красная, Ж. А.; Чижикова, З. А. |
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Проявление внутримолекулярных вибронных взаимодействий в тонкоструктурных спектрах флуоресценции и возбуждения флуоресценции полиеновых δ-диметиламинокетонов |
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Journal Article |
| Year |
2011 |
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Оптический журнал |
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Опт. ж. |
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78 |
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5 |
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3-8 |
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спектры флуоресценции; вибрационный анализ; адиабатическое гармоническое приближение; бесфононная линия; фононное крыло |
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Проведен вибрационный анализ спектров флуоресценции и возбуждения флуоресценции, полученных методом Шпольского при 4,2 K. Рассчитаны параметры внутримолекулярных взаимодействий двух δ-диметиламинокетонов. Для определения интегральных интенсивностей вибронных полос в спектрах с тонкой структурой на интенсивном сплошном фоне выполнено моделирование спектров путем представления полосы каждого из вибронных переходов бесфононной линией и фононным крылом с определенными параметрами (полуширинами, фактором Дебая–Валлера). Показано, что нарушение зеркальной симметрии в сопряженных спектрах флуоресценции и возбуждения флуоресценции этих двух соединений может быть обÑŠяснено интерференцией франк-кондоновского и герцберг-теллеровского взаимодействий. |
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RPLAB @ gujma @ |
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721 |
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Гольцман, Г. Н.; Разумовская, И. В.; Окунев, О. В; Чулкова, Г. М.; Корнеев, А. А.; Финкель, М. И.; Масленников, С. Н.; Семенов, А. В.; Александров, В. Н. |
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Сборник программ учебных дисциплин профессионального цикла подготовки магистров и бакалавров по направлению «Физика» |
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Journal Article |
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2011 |
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67 |
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Учебное пособие |
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RPLAB @ gujma @ |
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717 |
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Курочкин, Юрий Владимирович |
| Title |
Методы повышения пропускной способности квантовой криптографии |
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Manuscript |
| Year |
2011 |
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quantum cryptography |
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Ph.D. thesis |
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