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Author : Leonardo Fallani
Publisher :
ISBN 13 :
Total Pages : 161 pages
Book Rating : 4.:/5 (14 download)
Download or read book Bose-Einstein Condensates in Optical Lattices written by Leonardo Fallani and published by . This book was released on 2006 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Russell Campbell
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Localisation of Bose-Einstein Condensates in Optical Lattices written by Russell Campbell and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The properties of Bose-Einstein condensates can be studied and controlled effectively when trapped in optical lattices formed by two counter-propagating laser beams. The dynamics of Bose-Einstein condensates in optical lattices are well-described by a continuous model using the Gross-Pitaevskii equation in a modulated potential or, in the case of deep potentials, a discrete model using the Discrete Nonlinear Schrodinger equation. Spatially localised modes, known as lattice solitons in the continuous model, or discrete breathers in the discrete model, can occur and are the focus of this thesis. Theoretical and computational studies of these localised modes are investigated in three different situations. Firstly, a model of a Bose-Einstein condensate in a ring optical lattice with atomic dissipations applied at a stationary or at a moving location on the ring is presented in the continuous model. The localised dissipation is shown to generate and stabilise both stationary and traveling lattice solitons. The solutions generated include spatially stationary quasiperiodic lattice solitons and a family of traveling lattice solitons with two intensity peaks per potential well with no counterpart in the discrete case. Collisions between traveling and stationary lattice solitons as well as between two traveling lattice solitons display a dependence on the lattice depth. Then, collisions with a potential barrier of either travelling lattice solitons or travelling discrete breathers are investigated along with their dependence on the height of the barrier. Regions of complete reection or of partial reflection where the incoming soliton/breather is split in two, are observed and understood interms of the soliton properties. Partial trapping of the atoms in the barrier is observed for positive barrier heights due to the negative effective mass of the solitons/breathers. Finally, two coupled discrete nonlinear Schrodinger equations can describe the interaction and collisions of breathers in two-species Bose-Einstein condensates in deep optical lattices. This is done for two cases of experimental relevance: a mixture of two ytterbium isotopes and a mixture of Rubidium (87Rb) and Potassium(41K) atoms. Depending on their initial separation, interaction between stationary breathers of different species can lead to the formation of symbiotic localised structures or transform one of the breathers from a stationary one into a travelling one. Collisions between travelling and stationary discrete breathers composed of different species are separated in four distinct regimes ranging from totally elastic when the interspecies interaction is highly attractive to mutual destruction when the interaction is suffciently large and repulsive.
Author : Jongchul Mun
Publisher :
ISBN 13 :
Total Pages : 177 pages
Book Rating : 4.:/5 (317 download)
Download or read book Bose-Einstein Condensates in Optical Lattices written by Jongchul Mun and published by . This book was released on 2008 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: 87Rb Bose Einstein Condensate in 3D optical lattice was studied in the regime of weak interaction(the superfluid phase) and strong interaction(the Mott insulating phase). The stability of superfluid currents was studied using a moving optical lattice. The critical momentum for stable superfluid current varies from 0.5 recoil momentum (shallow lattice) to 0 (the Mott insulator) as the system reaches the Mott insulator transition. The phase diagram for the disappearance of superfluidity was studied as a function of momentum and lattice depth. Our phase diagram boundary extrapolates to the critical lattice depth for the superfluid-to-MI transition. When a one-dimensional gas was loaded into a moving optical lattice a sudden broadening of the transition between stable and unstable phases was observed. A new auxiliary vacuum chamber, which is called the science chamber, was designed and installed to improve optical lattice experimental performance and imaging resolution power. Atoms are transported from the main chamber to the science chamber. By further evaporation cooling, BECs with N - 2-3 x 104 atoms are produced in a combination trap of two focused IR laser beams. High-resolution imaging was obtained with a 4-lens stack providing a resolution of - 2pm. The deep Mott insulator(MI) phase was studied using clock shift spectroscopy. Individual MI phases with integer occupation numbers could be addressed through their clock shifts, and their spatial density profile could be imaged ("shell structure"). With increasing trap depth, MI shells expanded from low to high density regions of the cloud.
Author : Sarah McKinney
Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (57 download)
Download or read book Dynamics of Bose-Einstein Condensates in Optical Lattices written by Sarah McKinney and published by . This book was released on 2004 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Masahito Ueda
Publisher : World Scientific Publishing Company
ISBN 13 : 9813107448
Total Pages : 368 pages
Book Rating : 4.8/5 (131 download)
Download or read book Fundamentals And New Frontiers Of Bose-einstein Condensation written by Masahito Ueda and published by World Scientific Publishing Company. This book was released on 2010-07-29 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the fundamentals of and new developments in gaseous Bose-Einstein condensation. It begins with a review of fundamental concepts and theorems, and introduces basic theories describing Bose-Einstein condensation (BEC). It then discusses some recent topics such as fast-rotating BEC, spinor and dipolar BEC, low-dimensional BEC, balanced and imbalanced fermionic superfluidity including BCS-BEC crossover and unitary gas, and p-wave superfluidity.
Author : Kazimierz Łakomy
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (861 download)
Download or read book Dipolar Bose-Einstein Condensates in Optical Lattices written by Kazimierz Łakomy and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shunji Tsuchiya
Publisher :
ISBN 13 :
Total Pages : 90 pages
Book Rating : 4.:/5 (623 download)
Download or read book Hikari Kōshichū No Bōsu-Ainshutain Gyōshukutai Ni Kansuru Rironteki Kenkyū written by Shunji Tsuchiya and published by . This book was released on 2005 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Henrik Kjær Andersen
Publisher :
ISBN 13 :
Total Pages : 166 pages
Book Rating : 4.:/5 (488 download)
Download or read book Bose-Einstein Condensates in Optical Lattices written by Henrik Kjær Andersen and published by . This book was released on 2008 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karen Anna Clara Braun-Munzinger
Publisher :
ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.:/5 (766 download)
Download or read book Dynamics of Bose-Einstein Condensates in Optical Lattices written by Karen Anna Clara Braun-Munzinger and published by . This book was released on 2004 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lev. P. Pitaevskii
Publisher : Oxford University Press
ISBN 13 : 9780198507192
Total Pages : 392 pages
Book Rating : 4.5/5 (71 download)
Download or read book Bose-Einstein Condensation written by Lev. P. Pitaevskii and published by Oxford University Press. This book was released on 2003-04-03 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bose-Einstein Condensation represents a new state of matter and is one of the cornerstones of quantum physics, resulting in the 2001 Nobel Prize. Providing a useful introduction to one of the most exciting field of physics today, this text will be of interest to a growing community of physicists, and is easily accessible to non-specialists alike.
Author : Gretchen Kathleen Campbell
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (173 download)
Download or read book Eighty-seven Rubidium Bose-Einstein Condensates in Optical Lattices written by Gretchen Kathleen Campbell and published by . This book was released on 2006 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) When a small fraction of atoms was first transferred to k1 before ramping on the lattice, we observed the amplification of scattered atoms into k1 and k2. The superfluid-Mott Insulator transition was studied using microwave spectroscopy in a deep three-dimensional optical lattice. Using the density dependent clock shift we were able to spectroscopically distinguish sites with different occupation numbers, and to directly image sites with occupation number from 1 to 5, revealing the shell structure of the Mott Insulator phase.
Author : Christopher Pethick
Publisher :
ISBN 13 : 9781139811781
Total Pages : 584 pages
Book Rating : 4.8/5 (117 download)
Download or read book Bose-Einstein Condensation in Dilute Gases written by Christopher Pethick and published by . This book was released on 2014-05-14 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to ultracold atomic Bose and Fermi gases for advanced undergraduates, graduates, experimentalists and theorists.
Author : Panayotis G. Kevrekidis
Publisher : Springer Science & Business Media
ISBN 13 : 3540735917
Total Pages : 398 pages
Book Rating : 4.5/5 (47 download)
Download or read book Emergent Nonlinear Phenomena in Bose-Einstein Condensates written by Panayotis G. Kevrekidis and published by Springer Science & Business Media. This book was released on 2007-12-29 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, written by experts in the fields of atomic physics and nonlinear science, covers the important developments in a special aspect of Bose-Einstein condensation, namely nonlinear phenomena in condensates. Topics covered include bright, dark, gap and multidimensional solitons; vortices; vortex lattices; optical lattices; multicomponent condensates; mathematical methods/rigorous results; and the beyond-the-mean-field approach.
Author : Angela Susan Mellish
Publisher :
ISBN 13 :
Total Pages : 157 pages
Book Rating : 4.:/5 (156 download)
Download or read book Experiments with Bose-Einstein Condensates in Optical Lattices and Cold Collisions of Ultracold Atoms written by Angela Susan Mellish and published by . This book was released on 2005 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experimental realisation of Bose-Einstein condensation in 1995 opened up a wealth of opportunities for probing quantum states of matter. The development of many tools used to manipulate such ultracold samples and the rapid progress on understanding these systems will ultimately lead to great technological advances. The work described in this thesis contributes to this worldwide effort and here we present experiments which investigate the properties and behaviour of ultracold atoms.
Author : Robert Löw
Publisher :
ISBN 13 : 9783899634792
Total Pages : 145 pages
Book Rating : 4.6/5 (347 download)
Download or read book A Versatile Setup for Experiments with Rubidium Bose Einstein Condensates: From Optical Lattices to Rydberg Matter written by Robert Löw and published by . This book was released on 2007 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Meret Krämer
Publisher :
ISBN 13 :
Total Pages : 153 pages
Book Rating : 4.:/5 (18 download)
Download or read book Bose-Einstein Condensates in Rotating Traps and Optical Lattices written by Meret Krämer and published by . This book was released on 2004 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Emily E. Edwards
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (68 download)
Download or read book Construction of Apparatus and First Experiments Investigating Dynamics of Bose-Einstein Condensates in Disordered Optical Lattices written by Emily E. Edwards and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
