Quantum-Fluctuation-Driven Coherent Spin Dynamics in Small Condensates

Details Quantum-Fluctuation-Driven Coherent Spin Dynamics in Small Condensates Quantum-Fluctuation-Driven Coherent Spin Dynamics in Small Condensates

2008-06-06

arxiv.org/abs/0806.1220v1

Phy. Rev. A 78,050701(R) (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.78.050701

We have studied quantum spin dynamics of small condensates of cold sodium atoms. For a condensate initially prepared in a mean field ground state, we show that coherent spin dynamics are {\em purely} driven by quantum fluctuations of collective spin coordinates and can be tuned by quadratic Zeeman coupling and magnetization. These dynamics in small condensates can be probed in a high-finesse optical cavity where temporal behaviors of excitation spectra of a coupled condensate-photon system reveal the time evolution of populations of atoms at different hyperfine spin states.

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