Wang Ziqiang
Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
Phys Rev Lett. 2005 May 6;94(17):176804. doi: 10.1103/PhysRevLett.94.176804. Epub 2005 May 4.
The physics of vortices, instantons, and deconfinement is studied for layered superfluids in connection to bilayer quantum Hall systems at filling fraction nu = 1. We develop an effective gauge theory taking into account both vortices and instantons induced by interlayer tunneling. The renormalization group flow of the gauge charge and the instanton fugacity shows that the coupling of the gauge field to vortex matter produces a continuous transition between the confining phase of free instantons and condensed vortices and a deconfined gapless superfluid where magnetic charges are bound into dipoles. The interlayer tunneling conductance and the layer-imbalance induced inhomogeneous exciton condensate are discussed in connection to experiments.
研究了与填充因子ν = 1的双层量子霍尔系统相关的层状超流体中的涡旋、瞬子和去禁闭物理。我们发展了一种有效的规范理论，该理论考虑了层间隧穿诱导的涡旋和瞬子。规范电荷和瞬子逸度的重整化群流表明，规范场与涡旋物质的耦合在自由瞬子和凝聚涡旋的禁闭相以及磁荷束缚成偶极子的无禁闭无隙超流体之间产生了连续转变。结合实验讨论了层间隧穿电导和层不平衡诱导的非均匀激子凝聚。
