Dynamical instability of the XY spiral state of ferromagnetic condensates

Details Dynamical instability of the XY spiral state of ferromagnetic condensates Dynamical instability of the XY spiral state of ferromagnetic condensates

2007-10-12

arxiv.org/abs/0710.2499v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.100.180404

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.

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