Dynamical instability of the XY spiral state of ferromagnetic condensates
arXiv:0710.2499 · doi:10.1103/PhysRevLett.100.180404
Abstract
We calculate the spectrum of collective excitations of the XY spiral state prepared adiabatically or suddenly from a uniform ferromagnetic F=1 condensate. For spiral wavevectors past a critical value, spin wave excitation energies become imaginary indicating a dynamical instability. We construct phase diagrams as functions of spiral wavevector and quadratic Zeeman energy.
arXiv comment5 pages, 4 figures
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