Laser Control of Singlet-Pairing Process in an Ultracold Spinor Mixture

Abstract

In the mixture of ultracold spin-1 atoms of two different species A and B (e.g., ${}^{23}$Na (A) and ${}^{87}$Rb (B)), inter-species singlet-pairing process ${\mathrm{A}}_{+1}+{\mathrm{B}}_{-1}\rightleftharpoons {\mathrm{A}}_{-1}+{\mathrm{B}}_{+1}$, can be induced by the spin-dependent inter-atomic interaction, where subscript $\pm 1$ denotes the magnetic quantum number. Nevertheless, one cannot isolate this process from other spin-changing processes by tuning the bias real magnetic field. As a result, so far the singlet-pairing process have not been clearly observed in the experiments, and the measurement of the corresponding interaction strength becomes difficult. In this work we propose to control the singlet-pairing process via combining the real magnetic field and a laser-induced species-dependent synthetic magnetic field. With our approach one can significantly enhance this process and simultaneously supperess all other spin-changing processes. We illustrate our approach for both a confined two-atom system and a binary mixture of spinor Bose-Einstein condensates. Our control scheme is helpful for the precise measurement of the weakly singlet-pairing interaction strength and the entanglement generation of two different atoms.

13 pages, 6 figures

References in corpus (16)

• Realizing a scalable building block of a U(1) gauge theory with cold atomic mixtures
• Deterministic entanglement generation from driving through quantum phase transitions
• High-Resolution Magnetometry with a Spinor Bose-Einstein Condensate
• Spinor Dynamics in an Antiferromagnetic Spin-1 Condensate
• Analytical solutions for the dynamics of two trapped interacting ultracold atoms
• Observation of Dynamical Quantum Phase Transition with Correspondence in Excited State Phase Diagram
• Observation of quantum phase synchronization in spin-1 atoms
• Coherent heteronuclear spin dynamics in an ultracold spin-1 mixture
• A binary mixture of spinor atomic Bose-Einstein condensates
• Quantum states of a binary mixture of spinor Bose-Einstein condensates
• Spinor Bose-Einstein Condensate Interferometer within the Undepleted Pump Approximation: Role of the Initial State
• Interspecies singlet pairing in a mixture of two spin-1 Bose condensates
• Manipulation of heteronuclear spin dynamics with microwave and vector light shift
• Quantum Interferometry with Microwave-dressed F=1 Spinor Bose-Einstein Condensates: Role of Initial States and Long Time Evolution
• Collisional spin transfer in an atomic heteronuclear spinor Bose gas
• Dynamical mean-field driven spinor condensate physics beyond the single-mode approximation

Cited by in corpus (1)

• Phase separation and metastability in a mixture of spin-1 and spin-2 Bose-Einstein condensates