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Symmetry Allows for Distinguishability in Totally Destructive Many-particle Interference
Abstract: We investigate, in a four-photon interference experiment in a laser-written waveguide structure, how symmetries control the suppression of many-body output events of a J x unitary. We show that totally destructive interference does not require mutual indistinguishability between all but only between symmetrically paired particles, in agreement with recent theoretical predictions. The outcome of the experiment is well described by a quantitative simulation that accounts for higher-order emission of the photon source, imbalances in the scattering network, partial distinguishability, and photon loss
Etude des phénomènes d'absorption laser en régime femtoseconde pour l'ablation de matériaux diélectriques
Le micro-usinage de matériaux transparents est aujourd’hui un sujet d’intérêt mondial en recherche appliquée. L’emploi de lasers femtoseconde permet la micro-fabrication de composants optiques et de verres intelligents, ou la réalisation de cellules photovoltaïques. Dans ce contexte, cette thèse expérimentale se concentre sur l’absorption laser résolue en temps et en espace à la surface de matériaux diélectriques irradiés (silice fondue et saphir). Des impulsions femtoseconde (30 − 450 fs) dans l’infrarouge sont utilisées pour étudier l’efficacité de couplage de l’énergie laser pour l’ablation de matériaux dans un régime d’intensité intermédiaire (1-1...
Magnetism
This text book gives a comprehensive account of magnetism, one of the oldest yet most vibrant fields of physics. It spans the historical development, the physical foundations and the continuing research underlying the subject. The book covers both the classical and quantum mechanical aspects of magnetism and novel experimental techniques. Perhaps uniquely, it discusses spin transport and magnetization dynamics phenomena associated with atomically and spin engineered nano-structures against the backdrop of spintronics and magnetic storage and memory applications. The book is for students, and serves as a reference for scientists in academia and research laboratories.
Quantum Information and Quantum Computing
The open research center project "Interdisciplinary fundamental research toward realization of a quantum computer" has been supported by the Ministry of Education, Japan for five years. This is a collection of the research outcomes by the members engaged in the project. To make the presentation self-contained, it starts with an overview by Mikio Nakahara, which serves as a concise introduction to quantum information and quantum computing. Subsequent contributions include subjects from physics, chemistry, mathematics, and information science, reflecting upon the wide variety of scientists working under this project. These contributions introduce NMR quantum computing and related techniques, number theory and coding theory, quantum error correction, photosynthesis, non-classical correlations and entanglement, neutral atom quantum computer, among others. Each of the contributions will serve as a short introduction to these cutting edge research fields.
Urcel et son église
Cet ouvrage est une réédition numérique d’un livre paru au XXe siècle, désormais indisponible dans son format d’origine.
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