Coherent spinor dynamics in a spin-1 Bose condensate

By Ming-Shien Chang, Q. Qin, Wenxian Zhang, L. You, M. Chapman. 2005

278 citations recorded by the source corpus.

Collisions in a thermal gas are perceived as random or incoherent as a consequence of the large numbers of initial and final quantum states accessible to the system. In a quantum gas, for example, a Bose–Einstein condensate or a degenerate Fermi gas, the phase space accessible to low-energy collisions is so restricted that collisions become coherent and reversible. Here, we report the observation of coherent spin-changing collisions in a gas of spin-1 bosons. Starting with condensates occupying two spin states, a condensate in the third spin state is coherently and reversibly created by atomic collisions. The observed dynamics are analogous to Josephson oscillations in weakly connected superconductors and represent a type of matter–wave four-wave mixing. The spin-dependent scattering length is determined from these oscillations to be −1.45(32) bohr. Finally, we demonstrate coherent control of the evolution of the system by applying differential phase shifts to the spin states using magnetic fields.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/404b37d3b6b3a9dfdf3f27398afee89372d1f22a

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum metrology with nonclassical states of atomic ensembles (2016, background): “Typical experiments exploring the quantum spinmixing dynamics (Chang et al., 2005; Klempt et al., 2010; Leslie et al., 2009; Liu et al., 2009; Peise et al., 2015b; Schmaljohann et al., 2004) start with a condensate in the stable configuration.”
Time-Dependent Impurity in Ultracold Fermions: Orthogonality Catastrophe and Beyond (2012, background): “[11] Ming-Shien Chang, Qishu Qin, Wenxian Zhang, Li You, and Michael S.”
Colloquium: Nonequilibrium dynamics of closed interacting quantum systems (2010, background): “Similar demonstrations of collisional coherence have also been shown in spinor Bose gases (Chang et al., 2005; Kronjäger et al., 2005).”
Realization of a Quantum Integer-Spin Chain with Controllable Interactions (2014, background): “This experimental platform enables future studies of symmetry-protected order in spin-1 systems and their use in quantum applications.”