Spin soliton with a negative-positive mass transition
Li-Chen Zhao, Wenlong Wang, Qinglin Tang, Zhan-Ying Yang, Wen‐Li Yang, Jie Liu
Abstract
We obtain a striking spin soliton in a two-component Bose-Einstein condensate and investigate its motions in the presence of a constant force. The initially static spin soliton first moves in a direction opposite to the force and then changes direction, showing an extraordinary ac oscillation. The underlying mechanism is uncovered: the spin soliton can exhibit a periodic transition between negative and positive inertial mass because of a particular relation between its energy and moving velocity. We then develop a quasiparticle model that can account for this extraordinary oscillation. Important implications and possible applications are discussed.
Topics & Concepts
PhysicsOscillation (cell signaling)SolitonCondensed matter physicsSpin (aerodynamics)QuasiparticleBloch oscillationsJosephson effectSuperconductivityNonlinear systemEffective mass (spring–mass system)Quantum electrodynamicsQuantum mechanicsGeneticsSuperlatticeThermodynamicsBiologyCold Atom Physics and Bose-Einstein CondensatesMechanical and Optical ResonatorsPhysics of Superconductivity and Magnetism