منابع مشابه
Eigenvalues and Low Energy Eigenvectors of Quantum Many - Body Systems
I first give an overview of the thesis and Matrix Product States (MPS) representation of quantum spin systems on a line with an improvement on the notation. The rest of this thesis is divided into two parts. The first part is devoted to eigenvalues of quantum many-body systems (QMBS). I introduce Isotropic Entanglement (IE) and show that the distribution of QMBS with generic interactions can be...
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After more than 25 years of considerable theoretical and experimental efforts, it appears that QCD is the theory of strong interactions. Ideally, in high-energy QCD one needs one single piece of information from the experiments: the value of αs. Starting from that measured value, every observable can be computed from first principles. In practice this is not feasible, since we don’t know how to...
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We exploit theoretical results on the meson spectrum within the framework of a Bethe-Salpeter (BS) formalism adjusted for QCD, in order to extract an “experimental” coupling α s (Q) below 1 GeV by comparison with the data. The relativistic BS potential follows from a proper ansatz on the Wilson loop to encode confinement. The experimental points α s (Q) exhibit a reasonable agreement with the i...
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Given two nearby lying states of a m a n y b o d y system, each one involving m a n y one-par t ic le contributions, it would be very inconvenient to express the difference of the energies of these states as a difference of absolute energy values. Small errors in the absolute values could drast ical ly change the d i f ference. In cases where the energies are inf in i te , their difference make...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2011
ISSN: 1742-6596
DOI: 10.1088/1742-6596/322/1/012016