2020/08/31 by Jianwen Jie, Yonghong Yu, Dajun Wang +1
Computer Science · Physics and Astronomy · #Atom (system on chip) #Atomic and Subatomic Physics Research #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Excited state #Field (mathematics) #Magnetic field #Pairing #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Singlet state #Spin (aerodynamics) #Spinor #Superconductivity #Thermodynamics #Ultracold atom #cond-mat.quant-gas #physics.atom-ph
paper · pdf · doi:10.1103/physreva.103.053321
published as Phys. Rev. A 103, 053321 (2021) · 13 pages, 6 figures
arxiv created 2021/05/17 · openalex publication_date 2021/05/25 · arxiv updated 2021/06/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In the mixture of ultracold spin-1 atoms of two different species A and B (e.g., 23Na (A) and 87Rb (B)), the interspecies singlet-pairing process A+1+B_\ensuremath-1\ensuremath\rightleftharpoonsA_\ensuremath-1+B+1 can be induced by the spin-dependent interatomic interaction, where subscript \ifmmode±\else\textpm\fi1 denotes the magnetic quantum number. Nevertheless, one cannot isolate this process from other spin-changing processes, which are usually much stronger, by tuning the bias real magnetic field. As a result, it is difficult to clearly observe the singlet-pairing process and precisely measure the corresponding interaction strength. 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 suppress 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 weak singlet-pairing interaction strength and the entanglement generation of two different atoms.