We study the statics and dynamics of a dipolar Bose-Einstein condensate (BEC) droplet bound by interspecies contact interaction in a trapped nondipolar BEC. Our findings are demonstrated in terms of stability plots of a dipolar ${}^{164}$ Dy droplet bound in a trapped nondipolar ${}^{87}$ Rb BEC with a variable number of ${}^{164}$ Dy atoms and interspecies scattering length. A trapped nondipolar BEC of a fixed number of atoms can bind only a dipolar droplet containing fewer atoms than a critical number for the interspecies scattering length between two critical values. The shape and size (statics) as well as the small breathing oscillation (dynamics) of the dipolar BEC droplet are studied using numerical and variational solutions of a mean-field model. We also suggest an experimental procedure for achieving such a ${}^{164}$ Dy droplet by relaxing the trap on the ${}^{164}$ Dy BEC in a trapped binary ${}^{87}$ Rb- ${}^{164}$ Dy mixture.We study the statics and dynamics of a dipolar Bose-Einstein condensate (BEC) droplet bound by interspecies contact interaction in a trapped nondipolar BEC. Our findings are demonstrated in terms of stability plots of a dipolar ${}^{164}$Dy droplet bound in a trapped nondipolar ${}^{87}$Rb BEC with a variable number of ${}^{164}$Dy atoms and interspecies scattering length. A trapped nondipolar BEC of a fixed number of atoms can bind only a dipolar droplet containing fewer atoms than a critical number for the interspecies scattering length between two critical values. The shape and size (statics) as well as the small breathing oscillation (dynamics) of the dipolar BEC droplet are studied using numerical and variational solutions of a mean-field model. We also suggest an experimental procedure for achieving such a ${}^{164}$Dy droplet by relaxing the trap on the ${}^{164}$Dy BEC in a trapped binary ${}^{87}$Rb-${}^{164}$Dy mixture.

arXiv:1212.5004Physical Review AJan 17, 201313 citations

A $^{23}$ Na and $^{87}$ Rb double Bose-Einstein condensate with tunable interactionsA $^{23}$Na and $^{87}$Rb double Bose-Einstein condensate with tunable interactions

Dezhi Xiong, Xiaoke Li, Fudong Wang +1 more

We have realized a dual-species Bose-Einstein condensate of $^{23}$ Na and $^{87}$ Rb atoms and observed their immiscibility. Because of the favorite background intra- and inter-species scattering lengths, evaporative cooling and sympathetic cooling are efficient without the need for fine controlling of the interactions. Our system thus provides a clean platform for studying quantum fluid mixtures with tunable inter-species interactions. We have also demonstrated the interaction tuning with a inter-species Feshbach resonance by investigating the elastic collisions near zero crossing of the Na-Rb scattering length.We have realized a dual-species Bose-Einstein condensate of $^{23}$Na and $^{87}$Rb atoms and observed their immiscibility. Because of the favorite background intra- and inter-species scattering lengths, evaporative cooling and sympathetic cooling are efficient without the need for fine controlling of the interactions. Our system thus provides a clean platform for studying quantum fluid mixtures with tunable inter-species interactions. We have also demonstrated the interaction tuning with a inter-species Feshbach resonance by investigating the elastic collisions near zero crossing of the Na-Rb scattering length.

May 30, 20135 citations

Quantum droplet molecules in Bose-Bose mixtures

Khelifa Mohammed Elhadj, Laila Y. Al Sakkaf, Abdelâali Boudjemâa +1 more

Physics Letters ADec 11, 20237 citations

Spin evolution of a mixture of Rb and Na Bose–Einstein condensates: an exact approach under the single-mode approximation

Ma Luo, Bao Cheng-guang, Zhibing Li

Spin evolution of a mixture of two species of spin-1 Bose–Einstein condensates (Rb and Na) has been investigated rigorously. The Hamiltonian under the single-mode approximation (which is the only approximation in the present theory) has been solved exactly. Both analytical expressions and numerical results on the populations of spin components are obtained. Interference between the two species is found to depend sensitively on the initial states and the inter-species interaction. A number of phenomena arising from the interference have been predicted. In particular, periodic behaviour and the alternate appearances of a zone of oscillation and a long quiet zone are found.Spin evolution of a mixture of two species of spin-1 Bose–Einstein condensates (Rb and Na) has been investigated rigorously. The Hamiltonian under the single-mode approximation (which is the only approximation in the present theory) has been solved exactly. Both analytical expressions and numerical results on the populations of spin components are obtained. Interference between the two species is found to depend sensitively on the initial states and the inter-species interaction. A number of phenomena arising from the interference have been predicted. In particular, periodic behaviour and the alternate appearances of a zone of oscillation and a long quiet zone are found.

Journal of Physics B Atomic Molecular and Optical PhysicsDec 2, 20089 citations

{}^{164}

Dy droplet bound in a trapped nondipolar

{}^{87}

Rb BEC with a variable number of

{}^{164}

Dy atoms and interspecies scattering length. A trapped nondipolar BEC of a fixed number of atoms can bind only a dipolar droplet containing fewer atoms than a critical number for the interspecies scattering length between two critical values. The shape and size (statics) as well as the small breathing oscillation (dynamics) of the dipolar BEC droplet are studied using numerical and variational solutions of a mean-field model. We also suggest an experimental procedure for achieving such a

{}^{164}

Dy droplet by relaxing the trap on the

{}^{164}

Dy BEC in a trapped binary

{}^{87}

Rb-

{}^{164}

Dy mixture.

^{23}

Na and

^{87}

Rb double Bose-Einstein condensate with tunable interactions

We have realized a dual-species Bose-Einstein condensate of

^{23}

Na and

^{87}

Rb atoms and observed their immiscibility. Because of the favorite background intra- and inter-species scattering lengths, evaporative cooling and sympathetic cooling are efficient without the need for fine controlling of the interactions. Our system thus provides a clean platform for studying quantum fluid mixtures with tunable inter-species interactions. We have also demonstrated the interaction tuning with a inter-species Feshbach resonance by investigating the elastic collisions near zero crossing of the Na-Rb scattering length.