2000
DOI: 10.1016/s0030-4018(99)00545-3
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Measuring a coherent superposition

Abstract: We propose a simple method for measuring the populations and the relative phase in a coherent superposition of two atomic states. The method is based on coupling the two states to a third common (excited) state by means of two laser pulses, and measuring the total fluorescence from the third state for several choices of the excitation pulses.32.80. Bx, 33.80.Be,

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Cited by 14 publications
(6 citation statements)
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“…Various systems have been analyzed by the MS transformation [2], which include two-state superposition systems [7,8], three-state Λ-linkage systems [9], four-state diamond-and tripod-linkage systems [10][11][12][13][14], N -state M -and W -linkage systems [3], to list a few. The MS transformation of three-state Λ-linkage systems is in particular interesting in regards to the laser technique called stimulated Raman adiabatic passage (STI-RAP) [15], where the systems undergo an adiabatic evolution between MS-transformed coupled two states, leaving the dark state never populated during the laser interaction.…”
Section: Introductionmentioning
confidence: 99%
“…Various systems have been analyzed by the MS transformation [2], which include two-state superposition systems [7,8], three-state Λ-linkage systems [9], four-state diamond-and tripod-linkage systems [10][11][12][13][14], N -state M -and W -linkage systems [3], to list a few. The MS transformation of three-state Λ-linkage systems is in particular interesting in regards to the laser technique called stimulated Raman adiabatic passage (STI-RAP) [15], where the systems undergo an adiabatic evolution between MS-transformed coupled two states, leaving the dark state never populated during the laser interaction.…”
Section: Introductionmentioning
confidence: 99%
“…It has been used to design schemes for complete population transfer between degenerate states [5] and for creation of coherent superpositions of states [6]. The MS transformation has been also a crucial analytic method in creating recipes for efficient discrete quantum state tomography [7].…”
Section: Introductionmentioning
confidence: 99%
“…However, we consider a different system, and our proposal differs in a number of ways from those that have been previously put forth for SQUIDS. Note that STIRAP has been so far proposed for the controlled creation of superposition states in three-level, four-level or even N-level atomic systems [30][31][32][33][34][35][36][37] and for arbitrary qubit rotation via a four-level atomic system [38]. STIRAP has also been proposed as a method for the measurement of the density matrix of a multi-level system [39].…”
Section: Introductionmentioning
confidence: 99%