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See detailTransport properties of double quantum dots with electron-phonon coupling
Walter, Stefan; Trauzettel, Björn; Schmidt, Thomas UL

in Phys. Rev. B (2013), 88

We study transport through a double quantum dot system in which each quantum dot is coupled to a phonon mode. Such a system can be realized, e.g., using a suspended carbon nanotube. We find that the ... [more ▼]

We study transport through a double quantum dot system in which each quantum dot is coupled to a phonon mode. Such a system can be realized, e.g., using a suspended carbon nanotube. We find that the interplay between strong electron-phonon coupling and interdot tunneling can lead to a negative differential conductance at bias voltages exceeding the phonon frequency. Various transport properties are discussed, and we explain the physics of the occurrence of negative differential conductance in this system. [less ▲]

Detailed reference viewed: 26 (0 UL)
See detailTransport Strategy, Policy and Institutions
Hesse, Markus UL

in Journal of Transport Geography (2006), 14

Detailed reference viewed: 58 (0 UL)
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See detailTransport through a quantum spin Hall antidot as a spectroscopic probe of spin textures
Rod, Alexia UL; Dolcetto, Giacomo UL; Rachel, Stephan et al

in Physical Review B (2016), 94

We investigate electron transport through an antidot embedded in a narrow strip of two-dimensional topological insulator. We focus on the most generic and experimentally relevant case with broken axial ... [more ▼]

We investigate electron transport through an antidot embedded in a narrow strip of two-dimensional topological insulator. We focus on the most generic and experimentally relevant case with broken axial spin symmetry. Spin-non-conservation allows additional scattering processes which change the transport properties profoundly. We start from an analytical model for noninteracting transport, which we also compare with a numerical tight-binding simulation. We then extend this model by including Coulomb repulsion on the antidot, and we study the transport in the Coulomb-blockade limit. We investigate sequential tunneling and cotunneling regimes, and we find that the current-voltage characteristic allows a spectroscopic measurement of the edge-state spin textures. [less ▲]

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See detailTransport through open quantum dots: Making semiclassics quantitative
Brezinova, Iva; Wirtz, Ludger UL; Rotter, Stefan et al

in Physical Review. B, Condensed Matter and Materials Physics (2010), 81(12),

We investigate electron transport through clean open quantum dots (quantum billiards). We present a semiclassical theory that allows to accurately reproduce quantum-transport calculations. Quantitative ... [more ▼]

We investigate electron transport through clean open quantum dots (quantum billiards). We present a semiclassical theory that allows to accurately reproduce quantum-transport calculations. Quantitative agreement is reached for individual energy-dependent and magnetic field dependent elements of the scattering matrix. Two key ingredients are essential: (i) inclusion of pseudopaths which have the topology of linked classical paths resulting from diffraction in addition to classical paths and (ii) a high-level approximation to diffractive scattering. Within this framework of the pseudopath semiclassical approximation (PSCA), typical shortcomings of semiclassical theories such as violation of the anticorrelation between reflection and transmission and the overestimation of conductance fluctuations are overcome. Beyond its predictive capabilities the PSCA provides deeper insights into the quantum-to-classical crossover. [less ▲]

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See detailTransport, geography and the ‘new’ mobilities
Shaw, Jon; Hesse, Markus UL

in Transactions of the Institute of British Geographers (2010), 35(3), 305-312

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See detailTransportation, freight rates, and economic geography
Behrens, Kristian; Picard, Pierre M. UL

in Journal of International Economics (2011), 85(2), 280-291

We investigate the role of competitive transport markets in shaping the location of economic activity and the pattern of trade. In our model, carriers supply transport services for shipping manufactured ... [more ▼]

We investigate the role of competitive transport markets in shaping the location of economic activity and the pattern of trade. In our model, carriers supply transport services for shipping manufactured goods, and freight rates are set to clear transport markets. Each carrier must commit to the maximum capacity for a round-trip and thus faces a logistics problem as there are opportunity costs of returning empty. These costs increase the freight rates charged to firms located in regions that are net exporters of manufactured goods. Since demand for transport services depends on the spatial distribution of economic activity, the concentration of production in one region raises freight rates to serve foreign markets from there, thus working against specialization and the agglomeration of firms. Consequently, a more even spatial distribution of firms and production prevails at equilibrium when freight rates are endogenously determined than when they are assumed to be exogenous as in the literature. [less ▲]

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See detailTransportation-cost inequalities on path spaces over manifolds carrying geometric flows
Cheng, Li Juan UL

in Bulletin des Sciences Mathématiques (2016), 140(5), 541-561

Let Lt:=Δt+ZtLt:=Δt+Zt for a C1,1C1,1-vector field Z on a differential manifold M possibly with a boundary ∂M , where ΔtΔt is the Laplacian operator induced by a time dependent metric gtgt differentiable ... [more ▼]

Let Lt:=Δt+ZtLt:=Δt+Zt for a C1,1C1,1-vector field Z on a differential manifold M possibly with a boundary ∂M , where ΔtΔt is the Laplacian operator induced by a time dependent metric gtgt differentiable in t∈[0,Tc)t∈[0,Tc). In this article, by constructing suitable coupling, transportation-cost inequalities on the path space of the (reflecting if ∂M≠∅∂M≠∅) diffusion process generated by LtLt are proved to be equivalent to a new curvature lower bound condition and the convexity of the geometric flow (i.e., the boundary keeps convex). Some of them are further extended to non-convex flows by using conformal changes of the flows. As an application, these results are applied to the Ricci flow with the umbilic boundary. [less ▲]

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See detailTransposition de la directive AIFM : dépositaires de fonds d'investissement alternatifs (FIA)
Riassetto, Isabelle UL

in Revue de Droit Bancaire et Financier (2013)

Detailed reference viewed: 97 (9 UL)
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See detailTransposition of Directive 2009/136/EC on Electronic Communications Completed
Cole, Mark UL

E-print/Working paper (2012)

Detailed reference viewed: 24 (0 UL)
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See detailTranssexualität im Spannungsfeld juristischer und medizinischer Diskurse
De Silva, Adrian UL

in Zeitschrift für Sexualforschung (2005), 18(3), 258-271

Detailed reference viewed: 59 (6 UL)
See detailTransversal Report on Judicial Protection
Ligeti, Katalin UL; Robinson, Gavin UL

in Luchtman, Michiel; Vervaele, John (Eds.) Investigatory powers and procedural safeguards: Improving OLAF’s legislative framework through a comparison with other EU law enforcement authorities (ECN/ESMA/ECB) (2017)

Detailed reference viewed: 68 (14 UL)
See detailTransversal skills and their importance in education and educational assessment
Greiff, Samuel UL

Presentation (2013, January 09)

Detailed reference viewed: 47 (1 UL)
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See detailThe transversal skills that underlie modern human capital
Greiff, Samuel UL

Scientific Conference (2015, July)

Detailed reference viewed: 31 (3 UL)
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See detailTranszendentale Exklusionen. Philister, Juden, Zigeuner und Deutsche bei Achim von Arnim, Clemens Brentano und Johann Gottlieb Fichte
Dembeck, Till UL

in Bunia, Remigius; Dembeck, Till; Stanitzek, Georg (Eds.) Philister. Problemgeschichte einer Sozialfigur der neueren deutschen Literatur (2011)

Detailed reference viewed: 145 (1 UL)