Analytical approach to a bosonic ladder subject to a magnetic field

  title={Analytical approach to a bosonic ladder subject to a magnetic field},
  author={Shun Uchino},
  journal={Physical Review A},
  • S. Uchino
  • Published 16 March 2016
  • Physics
  • Physical Review A
We examine a bosonic two-leg ladder model subject to a magnetic flux and especially focus on a regime where the lower-energy band has two minima. By using a low-energy field theory approach, we study several issues discussed in the system: the existence of local patterns in density and current, chiral-current reversal, and the effect of a nearest-neighbor interaction along the rung direction. In our formalism, the local patterns are interpreted as a result of breaking of discrete symmetry. The… 

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