Shortcut to adiabaticity in spinor condensates
| Autor: | Sala, Arnau, Núñez, David López, Martorell, Joan, De Sarlo, Luigi, Zibold, Tilman, Gerbier, Fabrice, Polls, Artur, Juliá-Díaz, Bruno |
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| Rok vydání: | 2016 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.94.043623 |
| Popis: | 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. Comment: 10 pages, 7 figures |
| Databáze: | arXiv |
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