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ppt - Harvard Condensed Matter Theory group
ppt - Harvard Condensed Matter Theory group

CHAPTER 2. LAGRANGIAN QUANTUM FIELD THEORY §2.1
CHAPTER 2. LAGRANGIAN QUANTUM FIELD THEORY §2.1

... Before Fourier transforming to momentum space to recapture the particle interpretation as discussed in the introduction, let us consider symmetries in quantum field theory. In particular we would like to relate the time translation operator P 0 discussed in the quantum mechanics review to H above. F ...
PDF only - at www.arxiv.org.
PDF only - at www.arxiv.org.

VALIDITY OF SEMICLASSICAL GRAVITY
VALIDITY OF SEMICLASSICAL GRAVITY

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The Black Hole Information Paradox and the Collapse of the Wave

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... could retain the notion of a localised particle and explain how the resulting probability distributions arise without violating the uncertainty principle. Indeed both of these arguments are consistent with Einstein’s proposals that it is of no importance if you cannot verify directly certain element ...
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Stochastic Schrödinger equations

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philphys - General Guide To Personal and Societies Web Space

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Large Quantum Superpositions and Interference of Massive

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Strange and Stringy - Subir Sachdev
Strange and Stringy - Subir Sachdev

... nor a spin-density wave but a strange metal. The main new idea needed to describe the quantum-critical point, and the superconductors and strange metals close to it, is precisely the feature of quantum mechanics that so disturbed Einstein, Podolsky and Rosen: entanglement. Recall that entanglement i ...
D.5 Quantum error correction - UTK-EECS
D.5 Quantum error correction - UTK-EECS

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Quantum group

In mathematics and theoretical physics, the term quantum group denotes various kinds of noncommutative algebra with additional structure. In general, a quantum group is some kind of Hopf algebra. There is no single, all-encompassing definition, but instead a family of broadly similar objects.The term ""quantum group"" first appeared in the theory of quantum integrable systems, which was then formalized by Vladimir Drinfeld and Michio Jimbo as a particular class of Hopf algebra. The same term is also used for other Hopf algebras that deform or are close to classical Lie groups or Lie algebras, such as a `bicrossproduct' class of quantum groups introduced by Shahn Majid a little after the work of Drinfeld and Jimbo.In Drinfeld's approach, quantum groups arise as Hopf algebras depending on an auxiliary parameter q or h, which become universal enveloping algebras of a certain Lie algebra, frequently semisimple or affine, when q = 1 or h = 0. Closely related are certain dual objects, also Hopf algebras and also called quantum groups, deforming the algebra of functions on the corresponding semisimple algebraic group or a compact Lie group.Just as groups often appear as symmetries, quantum groups act on many other mathematical objects and it has become fashionable to introduce the adjective quantum in such cases; for example there are quantum planes and quantum Grassmannians.
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