Quantum coherence and population trapping in three-photon processes

Abstract

The spectroscopic properties of a single, tightly trapped atom are studied, when the electronic levels are coupled by three laser fields in an $N$-shaped configuration of levels, whereby a $\Lambda$-type level system is weakly coupled to a metastable state. We show that depending on the laser frequencies the response can be tuned from coherent population trapping at two-photon resonance to novel behaviour at three photon resonance, where the metastable state can get almost unit occupation in a wide range of parameters. For certain parameter regimes the system switches spontaneously between dissipative and coherent dynamics over long time scales.

References in corpus (8)

• Long-range interactions and entanglement of slow single-photon pulses
• Polarization qubit phase gate in driven atomic media
• Shaping quantum pulses of light via coherent atomic memory
• Optical clocks based on ultra-narrow three-photon resonances in alkaline earth atoms
• A high-accuracy optical clock via three-level coherence in neutral bosonic ${}^{88}$Sr
• A Single Atom Transistor in a 1D Optical Lattice
• Nonlinear optics via double dark resonances
• Phase-dependent interaction in a 4-level atomic configuration

Cited by in corpus (10)

• Doppler- and recoil-free laser excitation of Rydberg states via three-photon transitions
• Squeezing on momentum states for atom interferometry
• Bandwidth-tunable single photon source in an ion trap quantum network
• EIT-control of single-atom motion in an optical cavity
• Terahertz frequency standard based on three-photon coherent population trapping
• Efficient cloning and dragging of microwave pulse into optical frequency pulse in a Doppler-broadened atomic medium
• Experimental Demonstration of a Terahertz Frequency Reference based on Coherent Population Trapping
• Optical trap potential control in N-type four level atoms by femtosecond Gaussian pulses
• Doppler-free three-photon coherence effects in mercury vapor
• Coherent internal state transfer by three-photon STIRAP-like scheme for many-atom samples