Staff Information - Dr Andrew Ho |
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T: 01784 44 3196 EPSRC Advanced Research Fellow
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Dr Andrew Ho is an EPSRC Advanced Research Fellow and proleptic lecturer. My abiding quest is to understand quantum many-body physics. For my PhD (Rutgers University,USA) and after, I have been exploring theoretically unusual mecahnisms that destabilize the Fermi liquid---the "standard model" of a metal. Such work has been motivated by the unconventional properties of the metallic state in materials such as the cuprate superconductors, and some new classes of heavy fermion materials. Recently, I have been exploring the unusual metal to metal transition that comes from a spontaneous deformation of the Fermi surface due to electron-electron interaction. (Reference [1]) Since 2003, I have focussed on theories of strong correlation in cold atom traps. The unprecedented experimental possibilities in cold atom gases open up many challenging avenues for studying quantum correlated systems: my current research take advantage of such unique possibilities to explore: i) Quantum mixtures: unlike electron systems with only spin up or down, in atom traps mixtures of species can be loaded. Like solids, multiple Bloch bands can be loaded. Interaction strength and even the sign can be continuously tuned. Novel forms of superfluidity and new states of matter could arise. See references [2,3,5]. ii) Tunable dimensions: experiments on cold atoms allow the dimensionality to be tuned. One can follow how enhanced fluctuations special to 1D are suppressed, on going to higher dimensions. See reference [4]. iii) Non-equilibrium behaviour: the long timescales of cold atomic gases allow non-equilibrium quantum systems to be probed, an opportunity largely denied to electrons in solids. Key publications
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