2010/01/31 by Takuya Kitagawa, Alain Aspect, Markus Greiner +2
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.quant-gas #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.106.115302
published as Phys. Rev. Lett. 106, 115302 (2011) · 4 pages, 4 figures
arxiv created 2010/11/15 · openalex publication_date 2011/03/16 · arxiv updated 2011/05/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Nontrivial symmetry of order parameters is crucial in some of the most interesting quantum many-body states of ultracold atoms as well as condensed matter systems. Examples in cold atoms include p-wave Feshbach molecules and d-wave paired states of fermions that could be realized in optical lattices in the Hubbard regime. Identifying these states in experiments requires measurements of the relative phase of different components of the entangled pair wave function. We propose and discuss two schemes for such phase-sensitive measurements, based on two-particle interference revealed in atom-atom or atomic density correlations. Our schemes can also be used for relative phase measurements for nontrivial particle-hole order parameters, such as d-density wave order.