By P.R. Berman, C.C. Lin, E. Arimondo (Eds.)
Quantity fifty four of the Advances sequence comprises ten contributions, overlaying a variety of topic components in atomic, molecular and optical physics. the item through Regal and Jin stories the homes of a Fermi degenerate gasoline 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 through various an exterior magnetic box. Sherson, Julsgaard and Polzik discover the style within which gentle and atoms may be entangled, with functions to quantum details processing and conversation. They record at the results of fresh experiments concerning the entanglement of far-off items 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. attention-grabbing experiments are defined within which chilly, hugely excited atoms ("Rydberg" atoms) and chilly plasmas are generated. proof for a collective excitation of Rydberg topic can be awarded. Griffiin and Pindzola supply an account of non-perturbative quantal tools for electron-atom scattering methods. integrated within the dialogue are the R-matrix with pseudo-states technique and the time-dependent close-coupling strategy. an in depth assessment of the R-matrix idea of atomic, molecular, and optical strategies is given through Burke, Noble, and Burke. They current a scientific improvement of the R-matrix technique and its purposes to numerous methods akin 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 flooring and metastable states is mentioned within the article by means of Boffard, Jung, Anderson, and Lin. Excitation pass sections measured through the optical procedure are reviewed with emphasis at the actual interpretation by way of digital constitution of the objective atoms. Ozier and Moazzen-Ahmadi discover inner rotation of symmetric most sensible molecules. advancements of latest experimental equipment in accordance with high-resolution torsional, vibrational, and molecular beam spectroscopy permit actual decision of inner obstacles for those symmetric molecules. the topic of attosecond and angstrom technological know-how is reviewed through Niikura and Corkum. The underlying actual mechanisms permitting one to generate attosecond radiation pulses are defined and the know-how wanted for the training 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 indications. equipment for attaining tens of gigahertz prompt bandwidth with submegahertz answer utilizing such units are analyzed intimately and verified experimentally. ultimately, within the article through Illing, Gauthier, and Roy, it really is proven that small perturbations utilized to optical structures can be utilized to suppress or keep an eye on optical chaos, spatio-temporal dynamics, and styles. purposes of those strategies to communications, laser stabilization, and enhancing the sensitivity of low-light optical switches are explored. Â· foreign specialists Â· complete articles Â· New advancements
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Additional info for Advances In Atomic, Molecular, and Optical Physics, Vol. 54
The solid line in Fig. 11 shows a closeup of the multichannel bound state near threshold. Within a few gauss range of the Feshbach h¯ 2 resonance position the result obeys the expectation for a r0 , Eb = ma 2 (where a is determined through Eq. (6)), which is shown by the dashed line in Fig. 11. Farther away there is a clear deviation from quadratic behavior in 1/a. , 2005; Chin, 2005). The range of the van der Waals potential is given by (Gribakin and Flambaum, 1993) 1 (3/4) mC6 r0 = √ 8 (5/4) h¯ 2 1/4 .
After the evaporation the optical trap was recompressed to achieve a larger density, and the magnetic field was ramped to the desired value near the resonance. We then quickly turned on the resonant interaction by transferring atoms from the mf = −7/2 state to the mf = −5/2 state with a 73 µs rf π-pulse. The fraction of mf = −7/2 atoms remaining after the pulse was measured as a function of the rf frequency. The relative number of mf = −7/2 atoms was obtained from an absorption image of the gas taken after 1 ms of expansion from the optical trap.
We simply equate the integral over all states up to EF to the number of particles in one fermion spin state, N , to find EF h¯ ω¯ = (6N )1/3 . TF = (14) kb kb The temperature compared to TF describes the degeneracy of the Fermi gas and in the classical limit is related to peak phase space density through PSDpk = (T /TF )−3 /6. Also using the distribution function and the density of states we can obtain thermodynamic quantities such as the energy per particle, which will become important in Section 9.
Advances In Atomic, Molecular, and Optical Physics, Vol. 54 by P.R. Berman, C.C. Lin, E. Arimondo (Eds.)