FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1548292632> ?p ?o ?g. }

• W1548292632 abstract "In this work we investigate the dynamics of Bose-Einstein condensates (BECs) in inhomogeneous potential landscapes. As this research field continues to develop, more attention will focus on non-equilibrium systems, on potential applications that use condensates, and on the integration of cold atoms with other physical systems. This thesis covers all of these areas.We begin by recapping the historical background of condensate physics, with a definition of the condensed phase and discussion of various analytical quantities of relevance to this work. The Landau picture of supefluidity and predictions of its breakdown, given by the Landau criterion, is particularly pertinent to the results on supersonic flow in an inhomogeneous system.After outlining current experimental procedures, we present a computationally efficient modelling technique, used in our numerical simulations of atomic condensates. We then use this technique to study the dynamics of supersonic condensate flow, in the presence of a perturbing potential. Normally one would expect this situation to introduce disturbances, known as Landau excitations into the system, potentially destroying it. However, we find, under certain circumstances, complete suppression of Landau excitations: a behaviour that has not, to our knowledge, been previously observed. The efficiency of our chosen modeling technique allowed the possibility to conduct the large phase space campaigns necessary to find these special circumstances. On investigation, the mechanism resulting in the suppression of these Landau excitations is continuously related to the presence of transmission resonances in an equivalent linear quantum system. This demonstration of a link between linear and non-linear quantum regimes is of great interest in understanding possible behaviour in other non-equilibrium superfluid systems.Finally, we consider the magnetic fields from small scale (~ 1 µm) quantum electronic devices fabricated within a two-dimensional electron gas (2DEG). We demonstrate that atomic condensates provide a powerful tool for imaging these fields, or indeed similar fields created by other structures. Using a Fourier method, we show that the field profile that would be measured by the condensate can be used to recreate the current density of the 2DEG structure. The spatial resolution of this current mapping technique is limited only by the separation of the condensate from the current-carrying structure. We also show that quantum electronic conductors in 2DEGs are well suited to form a new generation of atom chips capable of trapping atoms < 1 µm away, thereby reducing both the size and power requirements of chip-trap potentials." @default.
• W1548292632 created "2016-06-24" @default.
• W1548292632 creator A5027624858 @default.
• W1548292632 date "2013-07-15" @default.
• W1548292632 modified "2023-09-28" @default.
• W1548292632 title "Inhomogeneities and instabilities of Bose-Einstein condensates in rough potential landscapes" @default.
• W1548292632 cites W1493632573 @default.
• W1548292632 cites W1542912141 @default.
• W1548292632 cites W1563794631 @default.
• W1548292632 cites W1578596938 @default.
• W1548292632 cites W1649252162 @default.
• W1548292632 cites W1753496101 @default.
• W1548292632 cites W1963988846 @default.
• W1548292632 cites W1965706122 @default.
• W1548292632 cites W1965738555 @default.
• W1548292632 cites W1967818727 @default.
• W1548292632 cites W1975055339 @default.
• W1548292632 cites W1976143157 @default.
• W1548292632 cites W1979835199 @default.
• W1548292632 cites W1981985562 @default.
• W1548292632 cites W1982653379 @default.
• W1548292632 cites W1985895575 @default.
• W1548292632 cites W1990595724 @default.
• W1548292632 cites W1991602497 @default.
• W1548292632 cites W1991981922 @default.
• W1548292632 cites W1995615788 @default.
• W1548292632 cites W1996276714 @default.
• W1548292632 cites W1997260831 @default.
• W1548292632 cites W2000301716 @default.
• W1548292632 cites W2001364498 @default.
• W1548292632 cites W2005970125 @default.
• W1548292632 cites W2006718018 @default.
• W1548292632 cites W2007575637 @default.
• W1548292632 cites W2008774307 @default.
• W1548292632 cites W2023285495 @default.
• W1548292632 cites W2026106782 @default.
• W1548292632 cites W2026521940 @default.
• W1548292632 cites W2026540062 @default.
• W1548292632 cites W2027634561 @default.
• W1548292632 cites W2029604900 @default.
• W1548292632 cites W2034012235 @default.
• W1548292632 cites W2038249383 @default.
• W1548292632 cites W2038289662 @default.
• W1548292632 cites W2042248542 @default.
• W1548292632 cites W2043660708 @default.
• W1548292632 cites W2045524076 @default.
• W1548292632 cites W2048040279 @default.
• W1548292632 cites W2048675712 @default.
• W1548292632 cites W2051741246 @default.
• W1548292632 cites W2056970256 @default.
• W1548292632 cites W2060577827 @default.
• W1548292632 cites W2060947223 @default.
• W1548292632 cites W2061349154 @default.
• W1548292632 cites W2067937769 @default.
• W1548292632 cites W2069504051 @default.
• W1548292632 cites W2071401061 @default.
• W1548292632 cites W2080739875 @default.
• W1548292632 cites W2081651308 @default.
• W1548292632 cites W2082299073 @default.
• W1548292632 cites W2085235217 @default.
• W1548292632 cites W2087211948 @default.
• W1548292632 cites W2094486531 @default.
• W1548292632 cites W2102182691 @default.
• W1548292632 cites W2104053738 @default.
• W1548292632 cites W2107054201 @default.
• W1548292632 cites W2109516761 @default.
• W1548292632 cites W2132639490 @default.
• W1548292632 cites W2140481628 @default.
• W1548292632 cites W2144254612 @default.
• W1548292632 cites W2155224358 @default.
• W1548292632 cites W2159588820 @default.
• W1548292632 cites W2230359778 @default.
• W1548292632 cites W2324535796 @default.
• W1548292632 cites W2562972486 @default.
• W1548292632 cites W2963388978 @default.
• W1548292632 cites W3003574152 @default.
• W1548292632 cites W3003776884 @default.
• W1548292632 cites W3014793358 @default.
• W1548292632 cites W3123728878 @default.
• W1548292632 cites W579992637 @default.
• W1548292632 hasPublicationYear "2013" @default.
• W1548292632 type Work @default.
• W1548292632 sameAs 1548292632 @default.
• W1548292632 citedByCount "0" @default.
• W1548292632 crossrefType "dissertation" @default.
• W1548292632 hasAuthorship W1548292632A5027624858 @default.
• W1548292632 hasConcept C121332964 @default.
• W1548292632 hasConcept C121864883 @default.
• W1548292632 hasConcept C151342819 @default.
• W1548292632 hasConcept C18762648 @default.
• W1548292632 hasConcept C202444582 @default.
• W1548292632 hasConcept C205991772 @default.
• W1548292632 hasConcept C33332235 @default.
• W1548292632 hasConcept C33923547 @default.
• W1548292632 hasConcept C37589322 @default.
• W1548292632 hasConcept C38349280 @default.
• W1548292632 hasConcept C57879066 @default.
• W1548292632 hasConcept C62520636 @default.
• W1548292632 hasConcept C74650414 @default.
• W1548292632 hasConcept C84114770 @default.

• next