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Previously recorded data of electron tunneling in and out of a quantum dot (QD) is used to extract knowledge of the state of the system. Using the detailed balance of the system, it is shown that information about the electron temperature in the lead Te, as well as knowledge about the degeneracies of the states in a quantum dot can be obtained from measurements of the tunneling rates in and out of

We show that the free-carrier absorption in quantum cascade lasers (QCLs) is very small and radically different from the classical Drude result due to the orthogonality between the direction of the carrier free motion and the electric field of the laser emission. A quantum mechanical calculation of the free-carrier absorption and intersubband oblique absorption induced by interface defects, Coulom

An ab initio quantum-classical mixed scheme for the time evolution of electrode-device-electrode systems is introduced to study nuclear dynamics in quantum transport. Two model systems are discussed to illustrate the method. Our results provide the first example of current-induced molecular desorption as obtained from a full time-dependent approach and suggest the use of ac biases as a way to tail

Litteraturlista ÄFYD13 Fysik 3: Grundläggande kvantmekanik och matematiska metoder för svängningar, vågor och diffusion för lärare Litteraturlista för ÄFYD13, Fysik 3: Grundläggande kvantmekanik och matematiska metoder för svängningar, vågor och diffusion för lärare gällande från och med höstterminen 2026 Litteraturlistan är fastställd av Studierektor vid Fysik 2026-06-02 att gälla från och med 20

https://www.uvet.lu.se/media/utbildning/dokument/kurser/AFYD13/20262/A_FYD13_Litteratur_25272_HT2026.pdf - 2026-09-28

We analyze femtosecond supercontinuum generation in a distribution of thin solid plates to show that the distributed scheme inhibits processes leading to pulse breakup while allowing spectral expansion to proceed as desired. We introduce basic criteria for setting the plate thickness or initial laser intensity and the location of each plate in the laser beam path and confirm that under these condi

We present an experimental study of harmonic generation in molecular gases, using the fundamental (800 nm) and the second harmonic (400 nm) of a 150 fs titanium - sapphire laser at an intensity of ##IMG## [http://ej.iop.org/images/0953-4075/29/14/032/img1.gif] . We compare the conversion efficiency and the maximum energy obtained in different species: rare gases (Ar, Xe), diatomic molecules ( ##IM

We study the physics of high-temperature cuprate superconductors starting from the highly degenerate four-site plaquette of the t− t′− U Hubbard model as a reference system. The degeneracy causes strong fluctuations when a lattice of plaquettes is constructed. We show that there is a large binding energy between holes when a set of four plaquettes is considered. The next-nearest-neighbour hopping

Isotopic differences in the distribution of nuclear charge and magnetization give rise to "hyperfine structure anomalies" which were observed already in the 1950s. More recently, the distribution of nuclear magnetization has been found to complicate the interpretation of the measured hyperfine splittings in highly charged hydrogen-like ions. In this paper, results of numerical calculations for a f

Western society has increasingly turned to different kinds of spirituality in dealing with an accelerated tempo and demands in everyday post-modern life. Yoga, meditation, mindfulness and other forms of modalities, often connected to ancient eastern thinking, are taught and implemented in management and leadership practises (Cederström & Spicer, 2015). Although organizational theorizing has prWestern society has increasingly turned to different kinds of spirituality in dealing with an accelerated tempo and demands in everyday post-modern life. Yoga, meditation, mindfulness and other forms of modalities, often connected to ancient eastern thinking, are taught and implemented in management and leadership practises (Cederström & Spicer, 2015). Although organizational theorizing has pr

https://www.lu.se/studera/fysik-allman-inriktning-masterprogram-NAFYK-ALLM - 2026-10-01

Popular Abstract in Swedish Den här avhandlingen beskriver elektrontransport i nanometerstora halvledarstrukturer vid mycket låga temperaturer (1 nanometer = 1 miljondels millimeter). De här strukturerna har helt andra elektriska egenskaper än vanliga ledare. Man ser effekter av enskilda elektroners transport, och av kvantmekaniska fenomen som kvantiserad energi och våginterferens. Området är föreIn this thesis, electron transport in mesoscopic semiconductor nanostructures, in particular so-called electron billiards or quantum dots, is studied. The thesis can be divided into two areas: the linear response regime of transport, and the nonlinear response regime of transport. The classical and quantum mechanical electron dynamics are studied for triangular and square-shaped electron billiard