Quantum computation
Other interesting things in ArXiv (11 Jun 2009)
Basically, there were so many interesting and useful papers (or at least they were useful for me) – lecture notes, reviews – that it will give me hard time posting reviews of all of them here – since I am lazy, I’ll just try to list some of them.
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This and that in ArXiv on Monday
Due to unbelievable overload of the last days let me simply list the recent papers in ArXiv that I found the most interesting:
1. Quantum information
T. Tilma el al., “Is entanglement a critical resource for quantum metrology?”
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377. Temporal and spatial dependence of quantum entanglement
Shih-Yuin Lin is a professor at Physics Division, National Center for Theoretical Sciences, Taiwan. Dmitry.
In textbooks, quantum entanglement are often introduced to readers with the simplest case: in an isolated system with two parties or subsystems, if a quantum states can be factorized into a product of the quantum states for each subsystem,
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366. Some interesting recent papers in Arxiv
Just wanted to acknowledge their existence, although I’ll not be really able to review them due to the lack of time…
1. Quantum field theory
1.1. “Non-Abelian Duality and Confinement in N=2 Supersymmetric QCD” by Michail Shifman and Alesha Yung. The authors study transitions from weak to strong coupling in N = 2 SQCD that happen when you change parameters of the theory – that is, the coefficient 
in front of Fayet?Iliopoulos term and quark mass differences. Here the authors are interested in the case 
and study phases of the theory at different values of .
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285. Dephasing and diffusion of quantum particles
This is a guest post by Ariel Amir from the Weizmann Institute of Science. Dmitry.
I was kindly asked by Dmitry to describe a recent work, where diffusion emerges from the decoherence in a noisy environment. This work was done together with Y. Lahini (an experimentalist) and H. Perets (an astrophysicist), and can be found on condmat (arXiv:0902.0890). Let me start by describing what a tight-binding model (for those of you outside Condensed Matter). This will be a convenient tool for us to understand decoherence, and other interesting physics such as ‘motional narrowing’.
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175. Holographic principle for dummies
Since today is Sunday, nobody should be allowed to overload your brain with too technical discussion of a new paper in ArXiv (there are no new papers till Monday, anyway!). But does it mean that I will devote part of this Sunday to posting something about financial crisis instead of science? No way! 
Since, as generally accepted, Sunday should be devoted to fun, let me have some physics related fun.
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174. Frank Wilczek on anyons
Another interesting recent paper in archives which a undergrad student will be able to read is the paper “New kinds of quantum statistics” by Frank Wilczek. I would say it is actually useful to read it irrespectively whether you are going to specialize in quantum field theory and string theory, condensed matter physics or quantum computing. As follows from the title of the paper, Wilczek is talking about quantum statistics different from Fermi-Dirac QM statistics (corresponding to fermions) or Bose-Einstein statistics (corresponding to bosons).
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