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Optica Publishing Group
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1998),
  • paper QMA3

A robust extension of stimulated Raman adiabatic passage to N-level systems

Open Access Open Access

Abstract

We show that the counterintuitive pulse sequence in stimulated Raman adiabatic passage (STIRAP), in which the Stokes pulse precedes the pump emerges automatically from a variant of optimal control theory we have previously called “local” optimization. Because 10cal optimization is a well-defined, automated computational procedure, this opens the door to automated computation of generalized STI- RAP schemes in arbitrarily complicated N-level coupling situations. If the coupling is sequential, a simple qualitative extension of STIRAP emerges: the Stokes pulse precedes the pump as in the three-level system. In addition, spanning both the Stokes and pump pulses are pulses corresponding to the transitions between the N-2 intermediate states with intensities about an order of magnitude greater than those of the Stokes and pump pulses. We call this a “straddling” STIRAP (or S-STIRAP) pulse sequence. This scheme is amazingly robust, leading to almost 100% population transfer with significantly less population transfer to the N-2 intermediate states than in previously proposed extensions of STIRAP.

© 1998 Optical Society of America

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