Entanglement Induced Phase Transitions

Details Entanglement Induced Phase Transitions Entanglement Induced Phase Transitions

2001-03-28

arxiv.org/abs/quant-ph/0103157v2

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

Starting from the canonical ensemble over the space of pure quantum states, we obtain an integral representation for the partition function. This is used to calculate the magnetisation of a system of N spin-1/2 particles. The results suggest the existence of a new type of first order phase transition that occurs at zero temperature in the absence of spin-spin interactions. The transition arises as a consequence of quantum entanglement. The effects of internal interactions are analysed and the behaviour of the magnetic susceptibility for a small number of interacting spins is determined.

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