Storing and manipulating quantum information using coupled Bose-Einstein condensates

A novel platform for storing, manipulating, and transporting quantum information is proposed based on qubits made of coupled Bose-Einstein condensates (BEC). The advantage of ... the model over the previously reported settings is that qubits are mobile and better protected from decoherence provided by surrounding condensate. Three qubit realizations are suggested - matter-wave soliton with an embedded single impurity atom, a Bosonic Josephson junction formed by condensate trapped in a double-well potential of the two-soliton molecule, and a supersolid state in dipolar BEC. The validity of the model will be demonstrated using analytical methods, such as perturbation theory, variational approach, phase space analysis and numerical simulations of the coupled Gross-Pitaevskii and Schrodinger equations.