Stimulated Raman adiabatic passage
Stimulated Raman adiabatic passage (STIRAP) is a process that permits transfer of a population between two applicable quantum states via at least two coherent electromagnetic (light) pulses.[1][2] These light pulses drive the transitions of the three level Ʌ atom or multilevel system.[3][4] The process is a form of state-to-state coherent control.
Population transfer in three level Ʌ atom
Consider the description of three level Ʌ atom having ground states and (for simplicity suppose that the energies of the ground states are the same) and excited state . Suppose in the beginning the total population is in the ground state . Here the logic for transformation of the population from ground state to is that initially the unpopulated states and couple, afterward superposition of state and couple to the state . Thereby a state is formed that permits the transformation of the population into state without populating the excited state . This process of transforming the population without populating the excited state is called the stimulated Raman adiabatic passage.[5]
References
- ^ Vitanov, Nikolay V.; Rangelov, Andon A.; Shore, Bruce W.; Bergmann, Klaas (2017). "Stimulated Raman adiabatic passage in physics, chemistry, and beyond". Reviews of Modern Physics. 89 (1). arXiv:1605.00224. Bibcode:2017RvMP...89a5006V. doi:10.1103/RevModPhys.89.015006. ISSN 0034-6861.
- ^ Bergmann, Klaas; Vitanov, Nikolay V.; Shore, Bruce W. (2015). "Perspective: Stimulated Raman adiabatic passage: The status after 25 years". The Journal of Chemical Physics. 142 (17): 170901. Bibcode:2015JChPh.142q0901B. doi:10.1063/1.4916903. ISSN 0021-9606.
- ^ Unanyan, R.; Fleischhauer, M.; Shore, B.W.; Bergmann, K. (1998). "Robust creation and phase-sensitive probing of superposition states via stimulated Raman adiabatic passage (STIRAP) with degenerate dark states". Optics Communications. 155 (1–3): 144–154. Bibcode:1998OptCo.155..144U. doi:10.1016/S0030-4018(98)00358-7. ISSN 0030-4018.
- ^ Schwager, Heike (2008). A quantum memory for light in nuclear spin of quantum dot (PDF). Max-Planck-Institute of Quantum Optics.
- ^ Marte, P.; Zoller, P.; Hall, J. L. (1991). "Coherent atomic mirrors and beam splitters by adiabatic passage in multilevel systems". Physical Review A. 44 (7): R4118–R4121. Bibcode:1991PhRvA..44.4118M. doi:10.1103/PhysRevA.44.R4118. ISSN 1050-2947.