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Transport through nanosystems is treated within the second-order von Neumann approach. This approach bridges the gap between rate equations which neglect level broadening and cotunneling, and the transmission formalism, which is essentially based on the single-particle picture thereby treating many-particle interactions oil an approximate level. Here we provide an alternative presentation of the m
Quantum dots are model systems for quantum thermoelectric behavior because of their ability to control and measure the effects of electron-energy filtering and quantum confinement on thermoelectric properties. Interestingly, nonlinear thermoelectric properties of such small systems can modify the efficiency of thermoelectric power conversion. Using quantum dots embedded in semiconductor nanowires,
The gain profile of a quantum cascade laser is strongly influenced by the lifetime of the carriers in the upper and lower laser state. The quantitative description of gain within the concept of nonequilibrium Green's functions allows for a detailed understanding of various features affecting the gain spectrum: Compensation effects between scattering processes in the upper and lower laser level, re
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In small systems with large fluctuations, the classical description of thermodynamics is no longer sufficient which has led to the development of stochastic thermodynamics. One important result from stochastic thermodynamics is that with measurement and feedback it is possible to use those fluctuations to extract work from a single heat bath coupled to the system. This is thanks to the connection
Quantum cascade lasers (QCLs) are periodic semiconductor heterostructures, capable of producing laser gain. They have become an important source of coherent radiation in the mid infrared, and THz frequency regions. QCLs are non-linear electric devices, and often have bias regions of negative differential resistivity (NDR). These regions are inherently unstable, and electric field domains (EFDs) fo
New centre brings together Lund University's quantum research Hoppa till huvudinnehåll Vi använder cookies och andra spårningsteknologier för att förbättra användarupplevelsen på vår webbplats, för att visa dig personligt innehåll och riktade annonser och för att analysera vår webbplatstrafik. Läs mer om cookies. Absolut nödvändiga cookies Dessa cookies är nödvändiga för att webbplatsen ska funger
https://www.lth.se/article/new-centre-brings-together-lund-universitys-quantum-research/ - 2026-10-05
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 - 2026-10-05
Nonlinear harmonic generation has been described theoretically, and observed, in free-electron laser (FEL) amplifiers. The mechanism relies on the nonlinear, higher-order bunching when the fundamental reaches high intensities, and can also be expected in high-power FEL oscillators. We use the 3D polychromatic simulation code MEDUSA to study the nonlinear harmonic generation in FEL oscillators. Str
