QUANTUM HALL EFFECT OF HARD CORE BOSONS
نویسندگان
چکیده
منابع مشابه
Do Hard-core Bosons Exhibit Quantum Hall Effect?
We motivate the study of hard-core bosons in an external magnetic eld by describing anyons either as fermions or hard-core bosons with gauge-ux attached to them. We brieey review earlier attempts to address this problem. We show why quantum Hall eeect (QHE) for hard-core bosons can occur in the thermodynamic limit and use a variational trial wavefunction approach to identify the lling factors w...
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Magnetotransport of hard-core bosons is studied using an XXZ quantum spin model representation, appropriately gauged on the torus to allow for an external magnetic field. We find strong lattice effects near half filling. An effective quantum mechanical description of the vortex degrees of freedom is derived. Using semiclassical and numerical analysis we compute the vortex-hopping energy tV, whi...
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We study the zero temperature phase diagram of hard-core bosons in two dimensions subjected to three types of background potentials: staggered, uniform, and random. In all three cases there is a quantum phase transition from a superfluid (at small potential) to a normal phase (at large potential), but with different universality classes. As expected, the staggered case belongs to the XY univers...
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ژورنال
عنوان ژورنال: Modern Physics Letters B
سال: 1995
ISSN: 0217-9849,1793-6640
DOI: 10.1142/s0217984995000577