Many-Body Treatment of the Collisional Frequency Shift in Fermionic Atoms
نویسندگان
چکیده
منابع مشابه
Many-body treatment of the collisional frequency shift in fermionic atoms.
Recent experiments have measured collisional frequency shifts in polarized fermionic alkaline-earth atoms using 1S0-3P0 Rabi spectroscopy. Here, we provide a first-principles nonequilibrium theoretical description of the interaction frequency shifts starting from the microscopic many-body Hamiltonian. Our formalism describes the dependence of the frequency shift on excitation inhomogeneity, int...
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Recombination of identical, spin-polarized fermions in cold threebody collisions is investigated. We parametrize the mechanisms for recombination in terms of the ‘scattering volume’ Vp and another length scale r0. Model two-body interactions were used within the framework of the adiabatic hyperspherical representation. We examine the recombination rate K3 as a function of the collision energy E...
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We have observed that the collisional frequency shift in primary caesium fountain clocks varies with the clock state population composition and, in particular, is zero for a given fraction of the |F=4,mF=0) atoms, depending on the initial cloud parameters. We present a theoretical model explaining our observations. The possibility of the collisional shift cancellation implies an improvement in ...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2009
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.103.260402