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arxiv: 1607.04119 · v1 · pith:GOZUOLHBnew · submitted 2016-07-14 · ❄️ cond-mat.quant-gas

Shortcut to adiabaticity in spinor condensates

classification ❄️ cond-mat.quant-gas
keywords shortcutstatecontrolparameterprotocolzeemanadiabaticadiabaticity
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We devise a method to shortcut the adiabatic evolution of a spin-1 Bose gas with an external magnetic field as the control parameter. An initial many-body state with almost all bosons populating the Zeeman sublevel $m=0$, is evolved to a final state very close to a macroscopic spin-singlet condensate, a fragmented state with three macroscopically occupied Zeeman states. The shortcut protocol, obtained by an approximate mapping to a harmonic oscillator Hamiltonian, is compared to linear and exponential variations of the control parameter. We find a dramatic speedup of the dynamics when using the shortcut protocol.

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