Measurement of ground-state decoherence via interruption of coherent population trapping

Journal Article · Thu Feb 15 04:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.023807· OSTI ID:20982183

Patnaik, Anil K ^[1]; Hsu, Paul S; Welch, George R ^[1]; Agarwal, Girish S ^[2]; Scully, Marlan O ^[3]

---

1. Institute for Quantum Studies and Department of Physics, Texas A and M University, Texas 77843 (United States)
2. Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)
3. Institute for Quantum Studies and Department of Physics, Texas A and M University, Texas 77843, USA (United States)

We examine the role of ground-state coherence on the fluorescence from the excited state in a three-level {lambda} system under continuous-wave excitation. When resonantly pumped, the fluorescence is strongly affected by any perturbation in the ground-state coherent population trapping. From our analytical results, we suggest how to use this strong dependence of fluorescence on the ground-state decays as a new method for the measurement of the ground-state decoherence rates. Our calculations should work well for a wide range of systems such as atomic vapors with a buffer gas, active dopants in solids, and quantum dots, etc. We present a proof of principle experiment using {sup 87}Rb vapor.

• OSTI ID: 20982183
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BUFFERS
DECAY
DISTURBANCES
DOPED MATERIALS
EXCITATION
EXCITED STATES
FLUORESCENCE
GROUND STATES
POPULATION INVERSION
QUANTUM DOTS
RUBIDIUM 87
SOLIDS
TRAPPING
VAPORS