Heat pulse experiments in superfluid 3He

Wellard, N.V.; Alexander, P.W.; Hall, H. E.; Hook, J. R.

doi:10.1016/0378-4363(82)90587-3

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2004

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“…In the recent years, the interplay between entanglement and quantum phase transitions has been the subject of many studies. Since the pioneering works on the Ising model in a transverse magnetic field [1,2] exhibiting the key role played by entanglement in quantum critical phenomena, lots of effort have been devoted to characterize the intricate structure of the ground state in spin systems [3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22] as well as in electron models [23,24,25]. All these studies show that entanglement, a genuine quantum property, can be used to probe the phase diagram of a system and especially to detect quantum phase transitions.…”

Section: Introductionmentioning

confidence: 99%

Entanglement dynamics in the Lipkin-Meshkov-Glick model

2004

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The dynamics of the one-tangle and the concurrence is analyzed in the Lipkin-Meshkov-Glick model which describes many physical systems such as the two-mode Bose-Einstein condensates. We consider two different initial states which are physically relevant and show that their entanglement dynamics are very different. A semiclassical analysis is used to compute the one-tangle which measures the entanglement of one spin with all the others, whereas the frozen-spin approximation allows us to compute the concurrence using its mapping onto the spin squeezing parameter.Comment: 11 pages, 11 EPS figures, published versio

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