By P.R. Berman, C.C. Lin, E. Arimondo (Eds.)
Quantity fifty four of the Advances sequence includes ten contributions, protecting a variety of topic components in atomic, molecular and optical physics. the object through Regal and Jin reports the houses of a Fermi degenerate fuel of chilly potassium atoms within the crossover regime among the Bose-Einstein condensation of molecules and the condensation of fermionic atom pairs. The transition among the 2 areas should be probed by way of various an exterior magnetic box. Sherson, Julsgaard and Polzik discover the way within which mild and atoms could be entangled, with functions to quantum info processing and communique. They file at the results of fresh experiments concerning the entanglement of far away items and quantum reminiscence of sunshine. contemporary advancements in chilly Rydberg atom physics are reviewed within the article by way of Choi, Kaufmann, Cubel-Liebisch, Reinhard, and Raithel. interesting experiments are defined during which chilly, hugely excited atoms ("Rydberg" atoms) and chilly plasmas are generated. facts for a collective excitation of Rydberg subject is usually provided. Griffiin and Pindzola supply an account of non-perturbative quantal tools for electron-atom scattering strategies. incorporated within the dialogue are the R-matrix with pseudo-states approach and the time-dependent close-coupling technique. an intensive overview of the R-matrix thought of atomic, molecular, and optical tactics is given via Burke, Noble, and Burke. They current a scientific improvement of the R-matrix strategy and its functions to varied strategies reminiscent of electron-atom scattering, atomic photoionization, electron-molecule scattering, positron-atom scattering, and atomic/molecular multiphoton tactics. Electron effect excitation of rare-gas atoms from either their flooring and metastable states is mentioned within the article through Boffard, Jung, Anderson, and Lin. Excitation move sections measured via the optical approach are reviewed with emphasis at the actual interpretation when it comes to digital constitution of the objective atoms. Ozier and Moazzen-Ahmadi discover inner rotation of symmetric best molecules. advancements of latest experimental tools in accordance with high-resolution torsional, vibrational, and molecular beam spectroscopy enable actual selection of inner obstacles for those symmetric molecules. the topic of attosecond and angstrom technology is reviewed by means of Niikura and Corkum. The underlying actual mechanisms permitting one to generate attosecond radiation pulses are defined and the expertise wanted for the instruction of such pulses is mentioned. LeGouÃ«t, Bretenaker, and LorgerÃ© describe how infrequent earth ions embedded in crystals can be utilized for processing optically carried broadband radio-frequency signs. equipment for achieving tens of gigahertz immediate bandwidth with submegahertz solution utilizing such units are analyzed intimately and established experimentally. ultimately, within the article through Illing, Gauthier, and Roy, it truly is proven that small perturbations utilized to optical platforms can be utilized to suppress or keep an eye on optical chaos, spatio-temporal dynamics, and styles. purposes of those innovations to communications, laser stabilization, and enhancing the sensitivity of low-light optical switches are explored. Â· foreign specialists Â· entire articles Â· New advancements
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Extra info for Advances In Atomic, Molecular, and Optical Physics, Vol. 54
Here we enhance interactions between the mf = −9/2, −5/2 spin states using a Feshbach resonance between these states at ∼224 G. At the position of the Feshbach resonance where σ is large, the aspect ratio σz /σy decreases. As the gas becomes collisionless away from the resonance the aspect ratio smoothly evolves to the collisionless value. The key to observing anisotropic expansion in these systems is that during the beginning of the expansion the magnetic field must remain at the value near the Feshbach resonance.
Figure 8 shows how a diverges according to Eq. (6) for the 40 K resonance described in the next section. 2. A S PECIFIC E XAMPLE To further illustrate Feshbach resonance physics it is useful to consider a specific atomic example. Here we will discuss the case of the 40 K resonance that is used for most of our BCS-BEC crossover studies. A. S. Jin [3 F IG . 8. Behavior of the scattering length at a Feshbach resonance in 40 K between the mf = −7/2, −9/2 spin states. F IG . 9. 40 K ground state level diagram, with exaggerated Zeeman splittings.