Supersolitons: Solitonic Excitations in Atomic Soliton Chains

Novoa, David; Malomed, Boris A.; Michinel, Humberto; Pérez-Garcı́a, Vı́ctor M.

doi:10.1103/physrevlett.101.144101

Cited by 34 publications

(48 citation statements)

References 53 publications

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“…Such bouncing motion of multicomponent BECs implies the possibility for realizing a Newton's cradle, which was experimentally observed in a Tonks-Girardeau gas [19] and theoretically predicted for colliding matter-wave solitons [25].…”

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confidence: 99%

Bouncing motion and penetration dynamics in multicomponent Bose-Einstein condensates

et al. 2016

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We investigate dynamic properties of bouncing and penetration in colliding binary and ternary Bose-Einstein condensates comprised of different Zeeman or hyperfine states of 87 Rb. Through the application of magnetic field gradient pulses, two-or three-component condensates in an optical trap are spatially separated and then made to collide. The subsequent evolutions are classified into two categories: repeated bouncing motion and mutual penetration after damped bounces. We experimentally observed mutual penetration for immiscible condensates, bouncing between miscible condensates, and domain formation for miscible condensates. From numerical simulations of the Gross-Pitaevskii equation, we find that the penetration time can be tuned by slightly changing the atomic interaction strengths. Multicomponent Bose-Einstein condensates (BECs) in dilute atomic gases are an attractive system for studying hydrodynamics of multicomponent quantum fluids owing to their unprecedented controllability. One of the significant properties characterizing multicomponent fluid systems is their miscibility; different fluids are either mutually miscible or phase separation occurs. In multicomponent BECs, the miscibility is determined by inter-and intra-species atomic interaction strengths [1] and, importantly, they can be experimentally controlled using Feshbach resonances [2,3] and Rabi coupling [4,5]. Multicomponent BECs with various degrees of miscibility are also available by choosing the internal states [6] or atomic species [7]. Employing such adjustability and selectability, intriguing phenomena that depend on the degree of miscibility have been experimentally observed, e.g., soliton generation in a counterflow of miscible fluids [8,9] The condition for miscibility in multicomponent BECs is determined by linear stability analysis of a static or steady state, and is not naively applicable to dynamical situations. Let us consider a situation in which two wave packets of different BECs collide with each other. One may think that the two wave packets pass through each other without much reflection for miscible BECs, while for immiscible BECs they do not. However, we will show that these simple predictions from the miscibility do not apply to a highly dynamic situation.In this Rapid Communication, we generate multicomponent BECs with various degrees of miscibility by utilizing the rich spin degrees of freedom of the 87 Rb atom, and investigate the dynamical properties of bouncing and penetration in colliding binary and ternary BECs in an optical trap. We observed various dynamics, including bouncing between miscible BECs and mutual penetration of immiscible BECs, which seems counterintuitive at first glance. In miscible and weakly immiscible binary and ternary systems, after a few bounces, BECs mutually penetrate and create the domain structure. In contrast, in the case of a relatively strongly immiscible system, binary BECs continue to bounce. Such repetitive bouncing motion between atoms has been observed only in a Tonks-Girardeau ga...

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confidence: 99%

Bouncing motion and penetration dynamics in multicomponent Bose-Einstein condensates

et al. 2016

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“…The figure clearly demonstrates that the momentum, which was originally imparted to the third soliton, is transferred along the chain by particle-like elastic collisions between the solitons. The collective excitation mode propagating along the soliton chains may be identified as a "supersoliton", i.e., a self-supporting localized perturbation moving along the chains of "primary" solitons [62].…”

Section: Supersolitons In Soliton Chains In the Nonlinear Couplermentioning

confidence: 99%

“…One recently elaborated example is a possibility to use arrays of optical solitons, in dissipative two-dimensional [54] and conservative one-dimensional [55] setups alike, for building optical counterparts of the Newton's cradle (NC), which are well known in mechanics and molecular dynamics [56][57][58][59], and "supersolitons", i.e., self-supporting dislocations propagating in chains of individual solitons. Previously, "supersolitons" were experimentally realized and theoretically studied in chains of fluxons populating long periodically inhomogeneous Josephson junctions [60,61], and predicted in binary Bose-Einstein condensates (BECs), with attractive interactions in each component and repulsion between them [62]. In this work, we aim to develop a robust NC model, using soliton chains in nonlinear couplers, and construct stable supersolitons as localized collective excitations in such chains.…”

Section: Introduction and The Modelmentioning

confidence: 99%

Multisoliton Newton's cradles and supersolitons in regular and parity-time-symmetric nonlinear couplers

Malomed

2014

Phys. Rev. E

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We demonstrate the existence of stable collective excitation in the form of "supersolitons" propagating through chains of solitons with alternating signs (i.e., Newton's cradles built of solitons) in nonlinear optical couplers, including the PT -symmetric version thereof. In the regular coupler, stable supersolitons are created in the cradles composed of both symmetric solitons and asymmetric ones with alternating polarities. Collisions between moving supersolitons are investigated too, by the means of direct simulations in both the regular and PT -symmetric couplers.

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“…Such solitons pass through each other at the collision point, and the TC is independent of the initial conditions, such as the separating distances and velocities [14]. For the repulsive interspecies interactions, there exists a regime of elastic particle collisions [15], where there occurs a rebound-collision (RC) with a momentum exchange between the BBSs. It is worthwhile pointing out that, in nonlinear optics, the collisional type of BBSs can be controlled by their initial velocities [17].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the interspecies interactions of two species BECs have important effect on the collisional properties of BBSs [13][14][15][16][17]. For the attractive interactions, a through-collision (TC) occurs between the BBSs [13,14].…”

Section: Introductionmentioning

confidence: 99%

Reflection-Transmission Transition of Bright-Bright Solitons Collision in Two Species Condensates with Repulsive Interspecies Interactions

Zhang-Ming¹,

Dong-Long²,

Ding³

et al. 2012

Commun. Theor. Phys.

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We study the dynamical properties of bright-bright solitons in two species Bose-Einstein condensates with the repulsive interspecies interactions under the external harmonic potentials by using a variational approach combined with numerical simulation. It is found that the interactions between bright-bright solitons vary from repulsive to attractive interactions with the increasing of their separating distances. And the bright-bright solitons can be localized at equilibrium positions, different from the periodic oscillation of bright soliton in the single species condensates. Especially, a through-collision is newly observed from the bright-bright solitons collisions with the increasing of the initial velocity. The collisional type of bright-bright solitons, either rebound -or through -collision, depends on the modulation of the initial conditions. These results will be helpful for the experimental manipulating such solitons.PACS (2008)

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Supersolitons: Solitonic Excitations in Atomic Soliton Chains

Cited by 34 publications

References 53 publications

Bouncing motion and penetration dynamics in multicomponent Bose-Einstein condensates

Bouncing motion and penetration dynamics in multicomponent Bose-Einstein condensates

Multisoliton Newton's cradles and supersolitons in regular and parity-time-symmetric nonlinear couplers

Reflection-Transmission Transition of Bright-Bright Solitons Collision in Two Species Condensates with Repulsive Interspecies Interactions

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