Rajendra Shrestha
University of Washington
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Publication
Featured researches published by Rajendra Shrestha.
Physical Review A | 2012
Rajendra Shrestha; J. Ni; W. K. Lam; Sandro Wimberger; Gil Summy
We experimentally investigate the phenomenon of a quantum ratchet created by exposing a Bose-Einstein Condensate to short pulses of a potential which is periodic in both space and time. Such a ratchet is manifested by a directed current of particles, even though there is an absence of a net bias force. We confirm a recent theoretical prediction [M. Sadgrove and S. Wimberger, New J. Phys. \textbf{11}, 083027 (2009)] that the current direction can be controlled by experimental parameters which leave the underlying symmetries of the system unchanged. We demonstrate that this behavior can be understood using a single variable containing many of the experimental parameters and thus the ratchet current is describable using a single universal scaling law.
New Journal of Physics | 2015
William Dowd; Richard Roy; Rajendra Shrestha; Alexander Petrov; Constantinos Makrides; Svetlana Kotochigova; Subhadeep Gupta
Magnetic Feshbach resonances have allowed great success in the production of ultracold diatomic molecules from bi-alkali mixtures, but have so far eluded observation in mixtures of alkali and alkaline-earth-like atoms. Inelastic collisional properties of ultracold atomic systems exhibit resonant behavior in the vicinity of such resonances, providing a detection signature. We study magnetic field dependent inelastic effects via atom loss spectroscopy in an ultracold heteronuclear mixture of alkali 6Li in the ground state and alkaline-earth-like 174Yb in an excited electronic metastable state (3P2, ). We observe a variation of the interspecies inelastic two-body rate coefficient by nearly one order of magnitude over a 100–520 G magnetic field range. By comparing to ab initio calculations we link our observations to interspecies Feshbach resonances arising from anisotropic interactions in this novel collisional system.
Physical Review A | 2016
Richard Roy; Rajendra Shrestha; Alaina Green; Subhadeep Gupta; Ming Li; Svetlana Kotochigova; Alexander Yu. Petrov; Chi Hong Yuen
We report on the production of ultracold heteronuclear YbLi* molecules in a dual-species magneto-optical trap by photoassociation (PA). The formation of the electronically excited molecules close to dissociation was observed by trap loss spectroscopy. We find 4 rovibrational states within a range of
Physical Review E | 2013
Rajendra Shrestha; J. Ni; W. K. Lam; Gil Summy; Sandro Wimberger
250\,
Annalen der Physik | 2017
J. Ni; Siamak Dadras; W. K. Lam; Rajendra Shrestha; Mark Sadgrove; Sandro Wimberger; Gil Summy
GHz below the Yb(
Fluctuation and Noise Letters | 2013
Rajendra Shrestha; W. K. Lam; J. Ni; Gil Summy
^1S_0
Physical Review E | 2013
Rajendra Shrestha; Sandro Wimberger; J. Ni; W. K. Lam; Gil Summy
) + Li(
Bulletin of the American Physical Society | 2015
Richard Roy; Rajendra Shrestha; Alaina Green; Subhadeep Gupta
^2P_{1/2}
Bulletin of the American Physical Society | 2015
Richard Roy; Rajendra Shrestha; Alaina Green; Subhadeep Gupta
) asymptote and observe isotopic PA line shifts in mixtures of
Bulletin of the American Physical Society | 2014
Richard Roy; William Dowd; Rajendra Shrestha; Alan Jamison; Alaina Green; Subhadeep Gupta
^6