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        Phase diffusion in a Bose-Einstein condensate of magnons

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        Publication date
        2015
        Author
        Enneking, H.A.Q.
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        Summary
        Research on the phase transition and phase diffusion between the Mott-insulator and superfluid phase has not yet been done extensively for the case of magnons. In this thesis we start from a model Hamiltonian for an easy-plane magnetic insulator and construct the phase diagram describing the transition between the Mott insulator and superfluid phase. Finally, we consider phase diffusion of the Bose-Einstein condensate in the superfluid phase and find that phase diffusion indeed occurs in a finite-sized system.
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        https://studenttheses.uu.nl/handle/20.500.12932/19372
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