By P.R. Berman, C.C. Lin, E. Arimondo (Eds.)
Quantity fifty four of the Advances sequence comprises ten contributions, protecting a variety of topic components in atomic, molecular and optical physics. the thing by way of Regal and Jin studies the homes 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 may be probed via various an exterior magnetic box. Sherson, Julsgaard and Polzik discover the way during which mild and atoms should be entangled, with functions to quantum details processing and communique. They file at the results of fresh experiments concerning the entanglement of far-off gadgets and quantum reminiscence of sunshine. contemporary advancements in chilly Rydberg atom physics are reviewed within the article via Choi, Kaufmann, Cubel-Liebisch, Reinhard, and Raithel. interesting experiments are defined within which chilly, hugely excited atoms ("Rydberg" atoms) and chilly plasmas are generated. proof for a collective excitation of Rydberg topic is additionally offered. Griffiin and Pindzola supply an account of non-perturbative quantal equipment for electron-atom scattering methods. integrated within the dialogue are the R-matrix with pseudo-states approach and the time-dependent close-coupling approach. an in depth assessment of the R-matrix thought of atomic, molecular, and optical techniques is given via Burke, Noble, and Burke. They current a scientific improvement of the R-matrix procedure and its functions to numerous procedures equivalent to electron-atom scattering, atomic photoionization, electron-molecule scattering, positron-atom scattering, and atomic/molecular multiphoton methods. Electron impression excitation of rare-gas atoms from either their floor and metastable states is mentioned within the article by way of Boffard, Jung, Anderson, and Lin. Excitation go sections measured by way of 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 most sensible molecules. advancements of latest experimental tools according to high-resolution torsional, vibrational, and molecular beam spectroscopy let actual choice of inner boundaries for those symmetric molecules. the topic of attosecond and angstrom technological know-how is reviewed via Niikura and Corkum. The underlying actual mechanisms permitting one to generate attosecond radiation pulses are defined and the expertise wanted for the education of such pulses is mentioned. LeGouët, Bretenaker, and Lorgeré describe how infrequent earth ions embedded in crystals can be utilized for processing optically carried broadband radio-frequency signs. tools for attaining tens of gigahertz instant bandwidth with submegahertz answer utilizing such units are analyzed intimately and tested experimentally. eventually, within the article by way of Illing, Gauthier, and Roy, it really is proven that small perturbations utilized to optical structures can be utilized to suppress or keep watch over optical chaos, spatio-temporal dynamics, and styles. purposes of those recommendations to communications, laser stabilization, and bettering the sensitivity of low-light optical switches are explored. · foreign specialists · entire articles · New advancements
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Additional info for Advances In Atomic, Molecular, and Optical Physics, Vol. 54
Sample text
B EYOND T = 0 The phase transition temperature, Tc , is an important parameter for any superfluid system. , it is lowest in the perturbative BCS regime and highest in the BEC limit (Fig. 1). 22 (Pethick and Smith, 2002). Note that BCS transition temperatures can be extremely small due to the exponential dependence upon 1/kF a. For example, at a typical interaction strength for alkali gases (a = −100a0 ) and a typical kF (1/kF = 2000a0 ) the BCS transition temperature would be ∼10−14 TF , which is a completely inaccessible temperature in contemporary atomic systems.
20. Impurity spin-state thermometry. Here we plot Tgauss for all of the states in the gas for multiple experiment iterations in which T was held fixed. 13. from real images with better signal to noise than E, and it is convenient because in the classical limit it becomes precisely the real temperature of the system. In Fig. 20 we plot Tgauss as a function of N for a cold gas of atoms distributed among the three states mf = 9/2, 7/2, and 5/2. N is the measured number of atoms in the spin state from which Tgauss is extracted.
S. Jin [4 Table I Distribution functions for a harmonically trapped Fermi gas Validity Spatial distribution where σr2 = all T /TF n(ρ) = 2 2 λN Li3/2 (−ζ e−ρ /2σr )/Li3 (−ζ ) (2π )3/2 σr3 2 2 λN nc (ρ) = e−ρ /2σr (2π )3/2 σr3 8 1 − ρ 2 3/2 for ρ < r , 0 otherwise n0 (ρ) = λN F rF2 rF3 π 2 1 T /TF kb T 2E and rF2 = F2 mωr2 mωr T =0 Validity 2 = 2mE Momentum distribution where σp2 = mkb T and pF F all T /TF Π(p) = T /TF 2 2 N Li3/2 (−ζ e−p /2σp )/Li3 (−ζ ) (2π )3/2 σp3 2 2 N Πc (p) = e−p /2σp (2π )3/2 σp3 2 3/2 Π0 (p) = N3 82 1 − p2 for p < pF , 0 otherwise p p π 1 T =0 F F F IG .