AION/Magis

Research group

Research theme

Sub department

About

Dynamics of evaporative cooling for Bose-Einstein condensation

Physical Review A - Atomic, Molecular, and Optical Physics 56:1 (1997) 560-569

Authors:

H Wu, E Arimondo, CJ Foot

Abstract:

We have simulated the evaporative cooling of a dilute gas of Bose particles including quantum statistics using a Monte Carlo method. This approach can model situations which are far away from quasiequilibrium such as occur during forced evaporative cooling. We have also simulated the dynamical formation of Bose-Einstein condensate for homogeneous and inhomogeneous Bose gases under the random-phase approximation. It was found that the rate of accumulation of Bose particles into low-energy states through collisions is increased by forced evaporation; and a macroscopic population at ground state can be reached at a time scale characterized by classical collision time for an inhomogeneous gas in a harmonic potential. We present the results of simulations for the evaporative cooling and formation of a Bose-Einstein condensate in one-, two-, and three-dimensional position cuts and energy cuts. © 1997 The American Physical Society.
More details from the publisher
More details

Nonequilibrium evolution of a trapped Bose gas

Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series 12 (1997) 28-29

Authors:

H Wu, E Arimondo, CJ Foot

Abstract:

An investigation focusing on the nonequilibrium evolution of a trapped Bose gas revealed that the formation of a Bose gas can be classified into three stages, namely: kinetic evolution; the formation of short range order; and the off-diagonal long-range order. Using a homogeneous gas consisting of sodium atoms. The evolution of non-Gaussian velocity distribution was observed. This indicates the accumulation of Bose particles at low energy states, but not necessarily the signature of the appearance of a macroscopic Bose-Einstein condensate. The condensate fraction will be very small when the ensemble of sodium atoms magnetically trapped in a harmonic potential is considered.

Search for neutrinoless [Formula presented] decays: [Formula presented] and [Formula presented]

Physical Review D - Particles, Fields, Gravitation and Cosmology 55:7 (1997) R3919-R3923

Authors:

KW Edwards, A Bellerive, R Janicek, DB MacFarlane, KW McLean, PM Patel, AJ Sadoff, R Ammar, P Baringer, A Bean, D Besson, D Coppage, C Darling, R Davis, N Hancock, S Kotov, I Kravchenko, N Kwak, S Anderson, Y Kubota, M Lattery, JJ O’Neill, S Patton, R Poling, T Riehle, V Savinov, A Smith, MS Alam, SB Athar, Z Ling, AH Mahmood, H Severini, S Timm, F Wappler, A Anastassov, S Blinov, JE Duboscq, D Fujino, R Fulton, KK Gan, T Hart, K Honscheid, H Kagan, R Kass, J Lee, MB Spencer, M Sung, A Undrus, R Wanke, A Wolf, MM Zoeller, B Nemati, SJ Richichi, WR Ross, P Skubic, M Wood, M Bishai, J Fast, E Gerndt, JW Hinson, N Menon, DH Miller, EI Shibata, IPJ Shipsey, M Yurko, L Gibbons, SD Johnson, Y Kwon, S Roberts, EH Thorndike, CP Jessop, K Lingel, H Marsiske, ML Perl, SF Schaffner, D Ugolini, R Wang, X Zhou, TE Coan, V Fadeyev, I Korolkov, Y Maravin, I Narsky, V Shelkov, J Staeck, R Stroynowski, I Volobouev, J Ye, M Artuso, A Efimov, F Frasconi, M Gao, M Goldberg, D He, S Kopp, GC Moneti, R Mountain, Y Mukhin, S Schuh, T Skwarnicki

Abstract:

A search for the lepton-family-number-violating decays [Formula presented] and [Formula presented] has been performed using CLEO II data. No evidence of a signal has been found and the corresponding upper limits are [Formula presented] and [Formula presented] at 90% C.L. © 1997 The American Physical Society.
More details from the publisher

Search for the decay [Formula presented]

Physical Review D - Particles, Fields, Gravitation and Cosmology 56:9 (1997) R5297-R5300

Authors:

KW Edwards, A Bellerive, R Janicek, DB MacFarlane, PM Patel, AJ Sadoff, R Ammar, P Baringer, A Bean, D Besson, D Coppage, C Darling, R Davis, N Hancock, S Kotov, I Kravchenko, N Kwak, S Anderson, Y Kubota, SJ Lee, JJ O’Neill, S Patton, R Poling, T Riehle, V Savinov, A Smith, MS Alam, SB Athar, Z Ling, AH Mahmood, H Severini, S Timm, F Wappler, A Anastassov, JE Duboscq, D Fujino, KK Gan, T Hart, D Homoelle, K Honscheid, H Kagan, R Kass, J Lee, MB Spencer, M Sung, A Undrus, R Wanke, A Wolf, MM Zoeller, B Nemati, SJ Richichi, WR Ross, P Skubic, M Bishai, J Fast, JW Hinson, N Menon, DH Miller, EI Shibata, IPJ Shipsey, M Yurko, L Gibbons, S Glenn, SD Johnson, Y Kwon, S Roberts, EH Thorndike, CP Jessop, K Lingel, H Marsiske, ML Perl, D Ugolini, R Wang, X Zhou, TE Coan, V Fadeyev, I Korolkov, Y Maravin, I Narsky, V Shelkov, J Staeck, R Stroynowski, I Volobouev, J Ye, M Artuso, A Efimov, M Goldberg, D He, S Kopp, GC Moneti, R Mountain, S Schuh, T Skwarnicki, S Stone, G Viehhauser, X Xing, J Bartelt, SE Csorna, V Jain, KW McLean

Abstract:

We have searched for the decay of the [Formula presented] lepton into seven charged particles and zero or one [Formula presented]. The data used in the search were collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR) and correspond to an integrated luminosity of 4.61 [Formula presented]. No evidence for a signal is found. Assuming all the charged particles are pions, we set an upper limit on the branching fraction [Formula presented] at the 90% confidence level. This limit represents a significant improvement over the previous limit. © 1997 The American Physical Society.
More details from the publisher

Study of flavor-tagged baryon production in B decay

Physical Review D American Physical Society (APS) 55:1 (1997) 13-18

Authors:

R Ammar, P Baringer, A Bean, D Besson, D Coppage, N Copty, R Davis, N Hancock, S Kotov, I Kravchenko, N Kwak, Y Kubota, M Lattery, JK Nelson, S Patton, R Poling, T Riehle, V Savinov, R Wang, MS Alam, IJ Kim, Z Ling, AH Mahmood, JJ O’Neill, H Severini, CR Sun, S Timm, F Wappler, G Crawford, JE Duboscq, R Fulton, D Fujino, KK Gan, K Honscheid, H Kagan, R Kass, J Lee, M Sung, C White, R Wanke, A Wolf, MM Zoeller, X Fu, B Nemati, WR Ross, P Skubic, M Wood, M Bishai, J Fast, E Gerndt, JW Hinson, T Miao, DH Miller, M Modesitt, EI Shibata, IPJ Shipsey, PN Wang, L Gibbons, SD Johnson, Y Kwon, S Roberts, EH Thorndike, TE Coan, J Dominick, V Fadeyev, I Korolkov, M Lambrecht, S Sanghera, V Shelkov, R Stroynowski, I Volobouev, G Wei, M Artuso, M Gao, M Goldberg, D He, N Horwitz, S Kopp, GC Moneti, R Mountain, F Muheim, Y Mukhin, S Playfer, T Skwarnicki, S Stone, X Xing, J Bartelt, SE Csorna, V Jain, S Marka, D Gibaut, K Kinoshita, P Pomianowski, S Schrenk, B Barish, M Chadha, S Chan, DF Cowen, G Eigen, JS Miller, C O’Grady, J Urheim, AJ Weinstein, F Würthwein, DM Asner, M Athanas, DW Bliss, WS Brower, G Masek, HP Paar, J Gronberg, CM Korte, R Kutschke, S Menary, RJ Morrison, S Nakanishi, HN Nelson, TK Nelson, C Qiao, JD Richman, D Roberts, A Ryd, H Tajima, MS Witherell, R Balest, K Cho, WT Ford, M Lohner, H Park, P Rankin, J Roy, JG Smith, JP Alexander, C Bebek, BE Berger, K Berkelman, K Bloom, TE Browder, DG Cassel, HA Cho, DM Coffman, DS Crowcroft, M Dickson, PS Drell, DJ Dumas, R Ehrlich, R Elia, P Gaidarev, B Gittelman, SW Gray, DL Hartill, BK Heltsley, S Henderson, CD Jones, SL Jones, J Kandaswamy, N Katayama, PC Kim, DL Kreinick, T Lee, Y Liu, GS Ludwig, J Masui, J Mevissen, NB Mistry, CR Ng, E Nordberg, JR Patterson, D Peterson, D Riley, A Soffer, C Ward, P Avery, A Freyberger, K Lingel, C Prescott, J Rodriguez, S Yang, J Yelton, G Brandenburg, D Cinabro, T Liu, M Saulnier, R Wilson, H Yamamoto, T Bergfeld, BI Eisenstein, J Ernst, GE Gladding, GD Gollin, M Palmer, M Selen, JJ Thaler, KW Edwards, KW McLean, M Ogg, A Bellerive, DI Britton, ERF Hyatt, R Janicek, DB MacFarlane, PM Patel, B Spaan, AJ Sadoff
More details from the publisher