Two functionally distinct sets of meristematic cells exist within root tips of pea (Pisum sativum): the root apical meristem, which gives rise to the body of the root; and the root cap meristem,â€¦ (More)

Extraction of sodium atoms from a trapped Bose-Einstein condensate (BEC) by a coherent, stimulated Raman process is demonstrated. Optical Raman pulses drive transitions between trapped and untrappedâ€¦ (More)

Using the gauge invariances, we show that the (fractional and integral) Quantum Hall (QH) states and the chiral spin states must have gapless boundary excitations. The dynamical properties of thoseâ€¦ (More)

A chiral spin state is not only characterized by the T and P order parameter E123 = ~ S1 Â· (~ S2Ã— ~ S3). It is also characterized by an integer k. In this paper we show that this integer k can beâ€¦ (More)

It is shown that several different order parameters can be used to characterize a type of P and T -violating state for spin systems, that we call chiral spin states. There is a closely related,â€¦ (More)

We study a model of fermions interacting with a gauge field and calculate gauge-invariant two-particle Greenâ€™s functions or response functions. The leading singular contributions from the self-energyâ€¦ (More)

Short- and long-period precursors of the PKP phase were used to study an ultra-low velocity zone (ULVZ) near the core-mantle boundary beneath the Western Pacific. Synthetic seismograms were computedâ€¦ (More)

We calculate the instanton-anti-instanton action S M Â¯ M (Ï„) in the gauge theory of the half-filled Landau level. It is found that S M Â¯ M (Ï„) = (3 âˆ’ Î·) [â„¦ 0 (Î·) Ï„ ] 1/(3âˆ’Î·) for a class ofâ€¦ (More)