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Spatiotemporal dynamics of circular flow modes in a ring array of Bose-Einstein condensates Tsukada, Noriaki 492 ツカダ, ノリアキ 塚田, 紀昭 493 420 application/pdf We numerically investigate the spatiotemporal dynamics of a circular flow mode in a ring array of Bose- Einstein condensates, which consists of M identical Bose-Einstein condensates that couple to the nearestneighbor sites by tunneling. Introducing a rotational potential in the Gross-Pitaevskii equation, a series of circular flow modes is resonantly excited. For the initial conditions with uniform density and one-round phase difference of 2p, sl=0,1, . . . ,M−1d, two circular flow modes are excited for each circulation-quantized number l. It is shown that these circular flow modes periodically appear in time in the presence of the rotational field and persistently survive with a constant shape even after the external potential is removed, the transitions between the circular flow modes with different quantized number l can be realized by applying the phaseimprinting optical pulses, and the rotational velocity of the circular flow mode can be continuously modulated by adiabatically tuning the scattering length in a magnetic field, i.e., by use of the Feshbach resonance. journal article American Physical Society 2004 VoR application/pdf Physical review. Ser. 3. A, Atomic, molecular, and optical physics 4 69 043608-1 043608-7 AA10764867 10502947 https://it-hiroshima.repo.nii.ac.jp/record/94/files/e043608.pdf https://it-hiroshima.repo.nii.ac.jp/records/94 eng info:doi/10.1103/PhysRevA.69.043608 http://dx.doi.org/10.1103/PhysRevA.69.043608 http://dx.doi.org/10.1103/PhysRevA.69.043608 ©2004 The American Physical Society