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The theory of nonequilibrium Green functions allows for a quantitative modeling of quantum cascade lasers. Explicit results are given for transport in a THz-laser and gain in a IR-Laser

Different screening models in quantum cascade lasers are compared by calculating the contribution of intrasubband impurity scattering to the optical linewidth as a function of temperature. We find a strong impact of impurity scattering, which increases substantially with temperature. A simple isotropic bulk screening model works well if the screening length is of the order of or longer than the pe

We consider an autonomous implementation of Maxwell's demon in a quantum dot architecture acting on a system without changing its number of particles or its energy. As in the original thought experiment, only the second law of thermodynamics is seemingly violated when disregarding the demon. The autonomous architecture allows us to compare descriptions in terms of information to a more traditional

Abstract: We study oscillations in quantum cascade lasers due to traveling electric field domains, which are observed both in simulations and experiments. These oscillations occur in a range of negative differential resistance and we clarify the condition determining whether the boundary between domains of different electric field can become stationary. Graphical abstract: [Figure not available: s

We show that mid-infrared transmission spectroscopy of a quantum cascade laser provides clear-cut information on changes in charge location at different bias. Theoretical simulations of the evolution of the gain/absorption spectrum for a lambda~7.4 µm InGaAs/AlInAs/InP quantum cascade laser have been compared with the experimental findings. Transfer of electrons between the ground states in the ac

Magneto-optical (MO) effects, viz. magnetically induced changes in light intensity or polarization upon reflection from or transmission through a magnetic sample, were discovered over a century and a half ago. Initially they played a crucially relevant role in unveiling the fundamentals of electromagnetism and quantum mechanics. A more broad-based relevance and wide-spread use of MO methods, howev

In particle collider experiments, elementary particle interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, as described by the theory of quantum chromodynamics (QCD)1. These partons subsequently emit further partons in a process that can be described as a parton shower2, which culminates in the formation of detectab

One of the world’s brightest and most powerful lights is created at MAX IV. Using the lights from MAX IV, scientists can understand how materials are built and how they can be used better than ever before.  Exploring materials with lightsAt MAX IV, scientists accelerate electrons in a linear accelerator so that they travel at nearly the speed of light. The electrons then enter storage rings where

https://www.lunduniversity.lu.se/research-and-innovation/research-infrastructures/max-iv - 2026-10-01

Cerium-based intermetallics are currently attracting much interest as a possible alternative to existing high-performance magnets containing scarce heavy rare-earth elements. However, the intrinsic magnetic properties of Ce in these systems are poorly understood due to the difficulty of a quantitative description of the Kondo effect, a many-body phenomenon where conduction electrons screen out the

https://www.lu.se/studera/economics-masterprogram-EAECO - 2026-10-02

https://www.lu.se/studera/livsmedelsteknik-och-nutrition-masterutbildning-TALIV - 2026-10-02

Here you will find information about all collectively regulated academic positions at Lund University and their requirements. Faculties may also set additional requirements, which are specified in each vacancy announcement. VacanciesWorking in academic rolesShortcuts to content on this page:Adjunct teaching staffLecturerTeaching staff in an artistic disciplinePostdocAssociate senior Lecturer (Assi

https://www.lunduniversity.lu.se/about-university/work-us/career-paths-lund-university/working-academic-roles/academic-titles-and-employment-qualifications - 2026-10-02

What's the difference between a department and a faculty? What is Ladok? On this page, you will find descriptions of a selection of terms that you may encounter during your studies at Lund University (Swedish terms in brackets). Below, you can find common words and phrases related to: Studies Student life Roles Studies Academic quarter (akademisk kvart) The academic quarter is a concept of time us

https://www.lunduniversity.lu.se/current-students/new-students/common-words-and-phrases - 2026-10-01

Long before the Bluetooth symbol started glowing blue ... ... and found its way into the pockets of people all over the world, there was a professor in Lund who refused to give up on a seemingly impossible idea: to replace the cable between mobile phones and headphones with a wireless link. And it was not just any link. It would work at a distance of ten metres, barely draw any power, take up hard

https://www.lunduniversity.lu.se/bluetooth-5g-meet-researchers-behind-wireless-communication - 2026-10-02

18 September 2026 17:00 to 4 October 2026 16:00 | Exhibition In the wake of Palestinian memory, National Pride: From Jericho to Gaza follows Hassan Al Balawi, a diplomat based in Brussels, returning to his homeland on the occasion of the fifteenth anniversary of the death of Yasser Arafat—a tutelary figure of the liberation struggle and leader of the PLO. Filmed in 2019, the film traces his journe

https://www.lunduniversity.lu.se/calendar/fierte-nationale-de-jericho-vers-gaza-sven-augustijnen - 2026-10-01

https://www.lu.se/studera/european-and-international-trade-and-tax-law-magisterprogram-EAEIT - 2026-10-02

https://www.lu.se/studera/konstnarligt-kandidatprogram-i-musik-individuell-studiegang-KGMUS-INST - 2026-10-02

Landfilling in "cells" has become more common in recent years. Different waste streams are guided to different cells, among which the biocell is a landfill designed for biogas production. In this thesis, the dependence of biogas generation on waste composition was investigated. Six 8,000 m3 test cells, with contents ranging from mainly commercial waste to pure domestic waste and equipped with gas

The downscaling of silicon-based structures and proto-devices has now reached the single-atom scale, representing an important milestone for the development of a silicon-based quantum computer. One especially notable platform for atomic-scale device fabrication is the so-called Si:P δ-layer, consisting of an ultra-dense and sharp layer of dopants within a semiconductor host. Whilst several alterna