Macroscopic Atom-Molecule Dark State and Its Collective Excitations in Fermionic Systems

Journal Article · Fri Dec 21 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.250404· OSTI ID:21024608

Robertson, Andrew; Ling, Hong Y ^[1]; Lei, Jiang; Han, Pu ^[2]; Weiping, Zhang ^[3]

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1. Department of Physics and Astronomy, Rowan University, Glassboro, New Jersey, 08028-1700 (United States)
2. Department of Physics and Astronomy, and Rice Quantum Institute, Rice University, Houston, Texas 77251-1892 (United States)
3. State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062 (China)

We show that a robust macroscopic atom-molecule dark state can exist in fermionic systems, which represents a coherent superposition between the ground molecular Bose-Einstein condensates and the atomic BCS paired state. We take advantage of the tunability offered by external laser fields, and explore this superposition for demonstrating coherent oscillations between ground molecules and atom pairs. We interpret the oscillation frequencies in terms of the collective excitations of the dark state.

• OSTI ID: 21024608
• Journal Information: Physical Review Letters, Vol. 99, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.99.250404; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
COLLECTIVE EXCITATIONS
FERMIONS
LASER RADIATION
MOLECULES
OSCILLATIONS