Friday, April 19, 2013

1304.5200 (M. Di Dio et al.)

Spontaneous Peierls dimerization and emergent bond order in
one-dimensional dipolar gases

M. Di Dio, L. Barbiero, A. Recati, M. Dalmonte
We investigate the effect of dipolar interactions in one-dimensional systems in connection with the possibility of observing exotic many-body effects with trapped atomic and molecular dipolar gases. By combining analytical and numerical methods, we show how the competition between short- and long-range interactions gives rise to frustrating effects which lead to the stabilization of spontaneously dimerized phases characterized by a bond-ordering. This genuine quantum order is sharply distinguished from Mott and spin-density wave phases, and can be unambiguously probed by measuring non local order parameters in-situ imaging techniques.
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