Coherent quantum state transfer in ultra-cold chemistry

Modak, Subhrajit; Das, Priyam; Panigrahi, Prasanta K.

doi:10.1140/epjd/s10053-022-00503-6

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2024

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“…This is in sharp contrast to the prediction of usual chemical kinematics, where rates do not depend on the number of participating particles and tend to zero at low temperature. The parameter controlling PA, leads to two different physical situations in case of α = 0 and α → 0 [42]. Without α, the excitation velocity is still a free parameter.…”

Section: Ordermentioning

confidence: 99%

Chemical oscillation in ultracold chemistry

Modak,

Das,

Mishra

et al. 2024

EPL

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We demonstrate the occurrence of oscillatory reactions in the ultra-cold chemistry of atom-molecular Bose-Einstein condensate. Nonlinear oscillations in the mean-ﬁeld dynamics occur for a speciﬁc range of elliptic modulus, giving rise to both in- and out-phase modulations in the atom-molecule population density. The reaction front velocity is found to be controlled by photoassociation, which also regulates the condensate density. Two distinct pair of in-phase bright localized gap solitons are found as exact solutions, existence of one of which necessarily requires a background. Cnoidal atomic density-waves along with a plane wave molecular motion are observed in both attractive and repulsive domains. Role of intra- and inter-species interactions on both existence and stability is explicated in the presence of photoassociation.

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Section: Ordermentioning

confidence: 99%