Enhanced selectivity and efficiency of coherent population transfer via a train of pulse pairs

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.033831· OSTI ID:21450649

Xihua, Yang ^[1]; Zhenhua, Zhang; Xiaona, Yan; Chunfang, Li ^[1]

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1. Department of Physics, Shanghai University, Shanghai 200444 (China)

We propose a way to significantly enhance selectivity and efficiency of coherent population transfer in a {Lambda}-type four-level system with a closely spaced doublet in the final state by using a train of counterintuitively ordered pump-Stokes pulse pairs. Due to temporal constructive and destructive quantum interference between the sequential transitions and subsequent coherent accumulation and annihilation in the time domain, the spectral resolution of selective and perfect population transfer to either of the final states can be improved by more than one order of magnitude as compared to the conventionally widely used stimulated Raman adiabatic passage and chirped adiabatic passage techniques, which can also be well understood as a result of the formation of a comblike structure of the pulse train spectrum in the frequency domain. Moreover, an arbitrary coherent superposition between the closely separated doublet can be achieved by suitably tuning the repetition period and detuning of the laser fields. This method has potential applications in control of chemical reactions and quantum information processing.

• OSTI ID: 21450649
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ADIABATIC PROCESSES
CONTROL
DATA PROCESSING
EFFICIENCY
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
INFORMATION
INTERFERENCE
LASER RADIATION
PROCESSING
PULSES
QUANTUM INFORMATION
QUANTUM STATES
RADIATIONS
RAMAN EFFECT