High-fidelity multistate STIRAP assisted by shortcut fields
- URL: http://arxiv.org/abs/2004.08341v1
- Date: Fri, 17 Apr 2020 16:53:33 GMT
- Title: High-fidelity multistate STIRAP assisted by shortcut fields
- Authors: Nikolay V. Vitanov
- Abstract summary: Multistate stimulated Raman adiabatic passage (STIRAP) is a process which allows for adiabatic population transfer.
The proposed method is simpler than the usual "shortcuts to adiabaticity" recipe.
The results are of potential interest to applications where high-fidelity quantum control is essential.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Multistate stimulated Raman adiabatic passage (STIRAP) is a process which
allows for adiabatic population transfer between the two ends of a
chainwise-connected quantum system. The process requires large temporal areas
of the driving pulsed fields (pump and Stokes) in order to suppress the
nonadiabatic couplings and thereby to make adiabatic evolution possible. To
this end, in the present paper a variation of multistate STIRAP, which
accelerates and improves the population transfer, is presented. In addition to
the usual pump and Stokes fields it uses shortcut fields applied between the
states, which form the dark state of the system. The shortcuts cancel the
couplings between the dark state and the other adiabatic states thereby
resulting (in the ideal case) in a unit transition probability between the two
end states of the chain. Specific examples of five-state systems formed of the
magnetic sublevels of the transitions between two degenerate levels with
angular momenta $J_g=2$ and $J_e=1$ or $J_e=2$ are considered in detail, for
which the shortcut fields are derived analytically. The proposed method is
simpler than the usual "shortcuts to adiabaticity" recipe, which prescribes
shortcut fields between all states of the system, while the present proposal
uses shortcut fields between the sublevels forming the dark state only. The
results are of potential interest in applications where high-fidelity quantum
control is essential, e.g. quantum information, atom optics, formation of
ultracold molecules, cavity QED, etc.
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