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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
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
heory predicts that electrons emitted from independent electron sources (metallic contacts) can nevertheless interfere. This interference is manifest in an exchange contribution to the shot noise correlation of currents at different contacts of a mesoscopic conductor. A geometry has been proposed in which second order (single particle) interference due to superposition of amplitudes is absent but
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
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
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
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
News | Centre for Languages and Literature All news 30 April 2021 The vice-chancellor’s spring greetings to staff and students The vice-chancellor Erik Renström is thanking all staff and students at Lund university for the fantastic, superhuman efforts you have made during the year. 10 October 2025 MULTICOM: an Erasmus Mundus Joint MA programme bridging humanities and technology MULTICOM is the fi
https://www.sol.lu.se/en/the-department/news/ - 2026-07-11
Founded in 1666, Lund University has a number of traditions which continue to be passed on to each new generation of students at Lund. Student theatre: 'Spex'Humour and ingenuity are combined to produce a so-called 'spex'; a farcical comedy/musicals based on historical events that is written, produced and performed by students. Spex dates back to 1886 and is one of Lund's more eccentric traditions
https://www.lunduniversity.lu.se/student-life/lund-student-city/traditions-lund - 2026-07-13
https://www.gis.lu.se/emu - 2026-07-13
Shaping the future of stem cell science At Lund Stem Cell Center, we inspire and empower the next generation of scientists through comprehensive training, mentorship, and impactful outreach. Research School in Stem Cell Biology The Research School provides comprehensive training and professional development activities, each of which is designed to prepare students and junior researchers for career
https://www.stemcellcenter.lu.se/education - 2026-07-13
Fotoreceptorerna - tappar och stavar - i ögats näthinna behövs för vår syn men är mycket sårbara, och sjukdomar kan göra att de degenererar och dör, vilket ger svår synnedsättning eller blindhet. En sådan sjukdom är Retinitis pigmentosa (RP), som drabbar ungefär 1 på 3000-4000 personer. RP-sjukdomen är ärftlig och beror på genmutationer, men det är oklart hur dessa får fotoreceptorerna att dö och The rod and cone photoreceptors in the retina of the eye are crucial for our vision, but also vulnerable to diseases, which can make them degenerate and die. Such diseases include Retinitis pigmentosa (RP), a heritable disease with a prevalence of about 1 in 3.000 – 4000 people. RP comes from gene mutations but it is not clear how these cause the degeneration and there are no therapies available.
Lund University is involved in 11 out of Sweden’s 20 national strategic research areas (SRAs), more than any other university in the country. The strategic research areas promote innovative thinking and risk-taking in research and are characterised by long-term vision and multidisciplinarity.They address current and complex challenges in-depth and from multiple perspectives, in areas such as healt
https://www.lunduniversity.lu.se/research-and-innovation/focus-areas/strategic-research-areas - 2026-07-13
A review of recent research, as well as new results, are presented on transition metal oxide clusters, surfaces, and crystals. Quantum-chem. calcns. of clusters of first row transition metal oxides have been made to evaluate the accuracy of ab initio and d. functional calcns. Adsorbates on metal oxide surfaces have been studied with both ab initio and semi-empirical methods, and results are presen
