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bose einstein condensation pdf

Bose-Einstein Condensation This chapter introduces several key features associated with the Bose-Einstein Conden-sation (BEC) phase transition. The subjects we will study in this chapter include an order parameter, spontaneous symmetry breaking, Nambu-Goldstone bosons, ofi-diagonal

bose einstein condensation pdf

翻訳 · A Bose–Einstein condensate can be understood as a macroscopically occupied single quantum state. We will now look at the weakly interacting gas. The phase transition describing the onset of BEC can be considered using an ideal gas, where the critical temperature is readily derived (see any undergraduate textbook on statistical mechanics [20]). Bose-Einstein Condensation of Small Systems Ruitian Lang, Vladimir Rosenhaus∗ MIT Department of Physics (Dated: May 14, 2008) We look at the Yang-Lee zeros in the complex temperature plane of Bose-Einstein condensate in a harmonic trap of dimensions 2−5. We apply the Grossmann classification scheme to characterize the phase transition. Bose–Einstein condensation was discovered in atomic gas systems, where Bose condensate occupies 100% of the total system at zero temperature. Liquid helium systems have been investigated based on the Landau theory, where the superfluid component of liquid helium is background flow. 翻訳 · 15.02.2017 · [PDF] Bose-Einstein Condensation in Dilute Gases Download Online Click Here http://ebookspdf.site/pdf/?book=0521665809 翻訳 · Bose–Einstein condensation (BEC) is studied for ideal boson gases with a wide class of the dispersion relations. A criterion of the BEC, the transition temperature and a fraction of the condensate are calculated under the appropriate thermodynamic limits. 翻訳 · 01.11.1995 · We have observed Bose-Einstein condensation of sodium atoms. The atoms were trapped in a novel trap that employed both magnetic and optical forces. Evaporative cooling increased the phase-space density by 6 orders of magnitude within seven seconds. Condensates contained up to 5×10 5 atoms at densities exceeding 10 14 cm -3. Bose-Einstein Condensation of Long-Lifetime Polaritons in Thermal Equilibrium Yongbao Sun,1,* Patrick Wen,1 Yoseob Yoon,1 Gangqiang Liu,2 Mark Steger,2 Loren N. Pfeiffer,3 Ken West,3 David W. Snoke,2,† and Keith A. Nelson1 1Department of Chemistry and Center for Excitonics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA 翻訳 · 15.02.2017 · Read Book Bose-Einstein Condensation (International Series of Monographs on Physics) Download Online Click Here http://ebookspdf.site/pdf/?book=0198507194 翻訳 · Share Bose Einstein Condensation. Embed size(px) Link. Share. Download. of 16. All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you. Share. Description. statistical phyics ... physical conditions for the Bose–Einstein condensation of exotic atoms are expressed in terms of this scattering length, which for the pµatoms interacting via 3 −+ u potentials, is calculated to be 1.13×10 2 au. The critical temperature for condensing the pµ atoms is estimated to be 0.5 K at a density of 2.2 × 1020 cm−3. 翻訳 · We present a consistent picture of the recent JILA experiments on the collapse of a Bose–Einstein condensate (BEC) [E. A. Donley et al. : Nature 412 (2001) 295] based on a generalized Gross–Pitaevskii equation that incorporates the effect of a three-body loss. The questions we address in this paper are: (1) Why does a BEC survive, albeit partially, after the collapse? Bose–Einstein condensation of excitons in bilayer electron systems J. P. Eisenstein1* & A. H. MacDonald*2 1Department of Physics, California Institute of Technology, Pasadena, California 91125, USA 2Department of Physics, University of Texas, Austin, Texas 78712, USA *These authors contributed equally to this work Positronium Bose-Einstein condensation. 2017/06/09. 5. Bose-Einstein condensation (BEC) Almost all of atoms in a cloud occupy a single quantum state Atoms must be dense and cold )LJXUH 2EVHUYDWLRQ RI %(& LQ UXELGLXP E\ WKH -,/$ JURXS 7KH XSSHU OHIW VHTXHQFH RI SLFWXUHV VKRZV WKH VKDGRZ FUHDWHG E\ Bose-Einstein Condensation Using Zeta Functions 08D2101022K Takashi Ando Katori Laboratory Department of Physics Chuo University “Spectral Functions in Mathematics and Physics ”by K. Kirsten Calculation on Bose-Einstein condensation (BEC) Bose-Einstein Condensation of Erbium K. Aikawa,1 A. Frisch,1 M. Mark,1 S. Baier,1 A. Rietzler,1 R. Grimm,1,2 and F. Ferlaino1 1Institut fu ¨r Experimentalphysik and Zentrum fur Quantenphysik, Universita¨t Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria 2Institut fu¨r Quantenoptik und Quanteninformation, O¨sterreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria INSTITUTE OF PHYSICS PUBLISHING JOURNAL OF PHYSICS B: ATOMIC, MOLECULAR AND OPTICAL PHYSICS J. Phys. B: At. Mol. Opt. Phys. 36 (2003) 3315–3324 PII: S0953-4075(03)61089-8 Phase diffusion of Bose–Einstein condensates in a one-dimensional optical lattice HongweiXiong 1, Shujuan Liu ,Guoxiang Huang2 and Lei Wang1 1 Department of Applied Physics, Zhejiang University of Technology, Hangzhou ... Bose-Einstein Condensation and Superfluidity of Dirty Bose Gas Michikazu Kobayashi and Makoto Tsubota Faculty of Science, Osaka City University, Japan ... • We develop the model, “dilute Bose gas in a random potential”. 翻訳 · Using this scheme, we show that Bose-Einstein condensation with ̃10 5 cesium atoms can be realized in 2-4s of forced evaporation. The evaporation speed and energetics are consistent with the three-dimensional evaporation picture, despite the fact that atoms can only leave the trap in the direction of tilt. Positronium Bose-Einstein Condensation (Ps-BEC) 2019/08/26 5 Applications of Ps-BEC 1. Antimatter gravity: Build Ps-BEC atomic interferometer to see gravitational effect on antimatter. • Gravity shifts phase of Ps in different paths Phys. stat. sol. 4, 3419 (2007) Bose-Einstein Condensation and Thermalization of the Quark-Gluon Plasma Jean-Paul Blaizot, IPhT- Saclay YITP, Kyoto August 24, 2011 Collaboration with F. Gelis, J. Liao, L. McLerran, R. Venugopalan [arXiv: 1107.5296 v2] WORK IN PROGRESS ! and SPECULATIVE.... Bose–Einstein condensation was predicted in the 1920s by Satyendra Nath Bose and Albert Einstein and was first observed experimentally in 1995 using dilute vapors of sodium and rubidium that had been cooled to temperatures near absolute zero [Anderson et al., 1995; Davis et al., 1995]. A 翻訳 · He Bose-Einstein condensate it is a state of matter that occurs in certain particles at temperatures close to absolute zero. For a long time it was thought that the three possible states of aggregation of matter were solid, liquid and gas. Then the fourth state was discovered: plasma; and the Bose-Einstein condensate is considered the fifth state. Bose-Einstein condensation This occurs when a fixed number of identical bosons is cooled in a gas of weakly interacting bosons. For N particles, N n i i 0 i 0 1 e ( i ) 1 Here we adopt the convention that the lowest state is 0 (not 1 as we used before). The first thing we should notice is that for all i, 翻訳 · Bose-Einstein condensate definition is - a state of matter that occurs when a set of atoms is cooled almost to absolute zero in which a statistical description of the positions of the atoms implies that they physically overlap each other and in effect form a single atom. How to use Bose-Einstein condensate in a sentence. Bose-Einstein condensation of an ideal Bose gas N identical bosons in a trap, at thermal equilibrium at temperature T When the temperature T is lowered, the de Broglie wavelength increases. When T < Tc, a macroscopic number of bosons N0condenses in the trap ground state. 30aYB-1 Bose-Einstein Condensation in Competitive Processes Hideaki Shimazaki† and Ernst Niebur* †Dept. of Physics, Kyoto University *Dept. of Neuroscience, Johns Hopkins University Competition plays a significant role in biological and social activities, and is the basis of evolution. We introduce an irreversible discrete multiplicative Study on Positronium Bose-Einstein Condensation Akira Ishida1∗, Kenji Shu1, Tomoyuki Murayoshi1,XingFan1, Toshio Namba1, Shoji Asai1, Kosuke Yoshioka2, Makoto Kuwata-Gonokami1, Nagayasu Oshima3, Brian E. O’Rourke3, and Ryoichi Suzuki3 1Department of Physics, Graduate School of Science, and International Center for Elementary Particle Physics (ICEPP), the University of Tokyo, 7–3–1 ... Bose-Einstein Condensation of Particles with Half Integer Spin. Oleg P. Sushkov University of New South Wales, Sydney Yukawa Institute, 10 November 2014 1 . The talk is based on two works A. W. Sandvik, V. N. Kotov, O. P. Sushkov, Thermodynamics of a gas of deconfined bosonic spinons in two dimensions. The Bose–Einstein condensation (BEC) is one of the most attractive topics in modern physics. The BEC of dilute alkali atoms has been achieved according to the development of the laser cooling technique.1,2) For solid state physics, it has been indicated that field-induced triplets (triplons)3) in a Bosonic dark matter, misalignment mechanism, and cosmic Bose-Einstein condensation Qiaoli Yang Jinan University 12-20-2017 Osaka University Bose-Einstein condensation in a periodic potential and its interference pattern • Introduction • Model: Gross-Pitaevskii equation • Pure periodic potential • Periodic and trapping potential Osaka-City-University, Japan M. Kobayashi and M. Tsubota. 1, Introduction 190 A. de Bouard and R. Fukuizumi / Stochastic NLS equation arising in Bose–Einstein condensation where λ = ± 1andξ˙ is a white noise in time with correlation function E(ξ˙(t)ξ˙(s)) = δ 0(t − s). Here, δ 0 denotes the Dirac measure at the origin, γ 0andε>0.The product arising in the right hand side is interpreted in the Stratonovich sense, since the noise here naturally arises ... 1 Bose–Einstein Condensation and Superfluidity Shosuke Sasaki1) and Hidenobu Hori2) 1) Shizuoka Institute of Science and Technology Toyosawa 2200-2, Fukuroi, Shizuoka 437-8555, Japan 2) Japan Advanced Institute of Science and Technology (JAIST) Asahidai Tatsunokuchi, Nomi, Ishikawa, 923-1292, Japan physics of Bose-Einstein condensation for varying degrees of degeneracy. As we shall see, when the degeneracy is low G 1 ,a single condensate can break up into G condensates. Follow-ing Nozières and Saint James 8,9 , we refer to such a state as a fragmented condensate defined more precisely below . The realization1 of Bose-Einstein condensation BEC with an atomic gas in 1995 has revived intense theoretical interests on interacting condensed Bose systems. One of their unique features is that the gapless Nambu-Goldstone boson2 of the broken U 1 symmetry, i.e., the Bogoliubov mode,3 emerges as a pole of the single-particle Green’s function ... 翻訳 · Bose-Einstein Condensation at Gakushuin University . Last updated on Aug 8, 2000 . In the night of 19 July 2000, we achieved BEC with rubidium atoms! (a) (b) (c) Absorption images of rubidium atoms taken after 20-ms expansion from a magnetic trap. (a)Thermal cloud with a temperature of about 500nK (just before phase transition). 翻訳 · A colorized lattice of tornado-like vortices within a spinning Bose Einstein condensate of rubidium atoms. Formed in an ultrahigh vacuum at temperatures of only a few hundred billionths of degree above absolute zero, such condensates are a new tool for studying quantum mechanics. 翻訳 · We analyze the stationary state properties of an atomic Bose-Einstein condensate coupled to a molecular condensate via a Raman photoassociation process using Gross-Pitaevskii and modified Gross-Pitaevskii model and compare the results. We find that and Bose-Einstein condensation Volker Betz, University of Warwick joint work with Daniel Ueltschi, University of Warwick Spatial random permutations di er from usual random permutations in that they are de ned on a subset of a metric space; the probability of any given spatial random