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Entanglement evolution is studied in open systems represented by rings of qubits with the Ising interaction and variously oriented external field and with Markov environments. The effect of thermal or dephasing environment is manifested as exponential decrease of the entanglement superposed on its dynamics in the isolated system. (C) 2009 Elsevier B.V. All rights reserved.
Quantum droplets may form out of a gaseous Bose-Einstein condensate, stabilized by quantum fluctuations beyond mean field. Determining the ground state of a rotating binary condensate, we show that multiple singly quantized vortices may form in these droplets at moderate angular momenta in two dimensions. Droplets carrying these precursors of an Abrikosov lattice remain self-bound for certain time
This dissertation deals with the optical properties of Quantum Cascade Lasers (QCLs). Studies are performed using transport calculations employing the theory of Non-Equilibrium Green's Functions, and screening is studied within the Random Phase Approximation. Focus is put on the temperature dependent effects in THz QCLs. After a popular science summary and a presentation and discussion of the the
We present a nonperturbative analysis of the power spectrum of energy level fluctuations in fully chaotic quantum structures. Focusing on systems with broken time-reversal symmetry, we employ a finite-N random matrix theory to derive an exact multidimensional integral representation of the power spectrum. The N→ limit of the exact solution furnishes the main result of this study - a universal, par
More efficient solar cells that are ultra-thin and flexible. Cleaner fuel that uses light to convert carbon dioxide into carbon monoxide. These are examples of discoveries that show how knowledge of light and materials can create new, more sustainable products for the future. Advanced basic researchWith the expertise available at Lund Laser Centre (LLC), NanoLund and MAX IV, researchers are now ab
https://www.lunduniversity.lu.se/research-and-innovation/research-excellence-areas/profile-areas/light-and-materials - 2026-07-15
Popular Abstract in Swedish Den här avhandlingen handlar om hur kristaller, som innehåller en liten mängd av ämnen tillhörande gruppen sällsynta jordartsmetaller, kan användas för forskning och tillämpningar rörande kvantinformation. Genom att belysa kristallerna med laserljus kan atomernas tillstånd styras och studeras. I avhandlingen diskuteras olika aspekter av hur de sällsynta jordartsatomer sThis thesis describes investigations of the use of cryogenically cooled rare-earth-ion-doped crystals for quantum information processing and quantum optics. Several aspects of the coherent interaction between light and rare-earth ions in solids are addressed. Quantum information science has given physicists new views of quantum mechanics. The transmission of quantum states has already found pract
Visiting Professor at the Lund University School of Economics and Management Current position: ProfessorCurrent university or institution: Columbia UniversityCountry: USA Why did you choose Lund University?I have already spent two years as a visiting professor in the Department of Statistics at LUSEM, which has been an extremely positive experience. During this time, I have established strong co
https://www.lunduniversity.lu.se/iuliana-ionita-laza - 2026-07-15
As a teenage cancer patient, Lao Saal experienced firsthand how science can rewrite a life. Years later at Lund University, he developed a blood test that can detect signs of cancer relapse far earlier than today’s clinical standards. ”I think teenage me would be really proud. That experience is always with me – it’s the entire reason why I became a researcher.” The uncertainty after breast cancer
https://www.lunduniversity.lu.se/how-cancer-survivor-developed-blood-test-can-change-cancer-care - 2026-07-15
At Lund University Improving people's living conditions and contributing to solutions for global societal challenges is one of the main tasks of Lund University's profile areas. Human rights By bringing together several research disciplines, researchers at Lund University aim to address global societal problems and promote human rights as effective tools for justice. Human rights Close Light and m
https://www.lunduniversity.lu.se/research-and-innovation/research-excellence-areas/profile-areas - 2026-07-15
We perform an experimental two-color high-order harmonic generation study in argon with the fundamental of an ytterbium ultrashort pulse laser and its second harmonic. The intensity of the second harmonic and its phase relative to the fundamental are varied, in a large range compared to earlier works, while keeping the total intensity constant. We extract the optimum values for the relative phase
Lund University offers a variety of career opportunities, including academic, research, doctoral and professional service roles. Whatever your expertise, you can develop your skills and contribute to the University's work. Working as a doctoral studentAs a doctoral student at Lund University, you are employed while completing your doctoral (PhD) studies. This gives you financial security and full
https://www.lunduniversity.lu.se/about-university/work-us/careers-lund-university - 2026-07-15
With shrinking technologies and higher clock rates comes the possibility to transform multi chip implementations to a single System on Chip (SoC). Implementing clock distribution and limiting the power consumption becomes increasingly troublesome with increased clock rate and chip area. Therefore, designing large Systems on Chip makes it necessary to search for new implementation methods. In this
