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Helmut Ritsch
Helmut Ritsch (; born 12 March 1962 in Innsbruck) is an Austrian quantum physicist and a professor of theoretical physics at the University of Innsbruck. Helmut Ritsch's research concerns the fundamental aspects and applications of quantum optics and cavity quantum electrodynamics. Together with his theory group, he focuses on cavity cooling, self-organization, quantum thermodynamics, light forces, superradiant lasing and quantum metrology. His significant contributions in those fields have been honoured with prestigious awards and prizes, as the Ludwig Boltzmann Prize (1993) of the Austrian Physical Society and the Erwin Schrödinger Prize (2019) of the Austrian Academy of Sciences. Life and career Ritsch grew up in Stubaital in the neighbourhood of Innsbruck. He graduated in 1980 from Akademischen Gymnasium in Innsbruck and studied physics at the University of Innsbruck, where he finished his diploma study in 1985 with a thesis about synchrotron radiation. He began his doc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helmut Ritsch
Helmut Ritsch (; born 12 March 1962 in Innsbruck) is an Austrian quantum physicist and a professor of theoretical physics at the University of Innsbruck. Helmut Ritsch's research concerns the fundamental aspects and applications of quantum optics and cavity quantum electrodynamics. Together with his theory group, he focuses on cavity cooling, self-organization, quantum thermodynamics, light forces, superradiant lasing and quantum metrology. His significant contributions in those fields have been honoured with prestigious awards and prizes, as the Ludwig Boltzmann Prize (1993) of the Austrian Physical Society and the Erwin Schrödinger Prize (2019) of the Austrian Academy of Sciences. Life and career Ritsch grew up in Stubaital in the neighbourhood of Innsbruck. He graduated in 1980 from Akademischen Gymnasium in Innsbruck and studied physics at the University of Innsbruck, where he finished his diploma study in 1985 with a thesis about synchrotron radiation. He began his doc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austrian Physical Society
The Austrian Physical Society (german: Österreichische Physikalische Gesellschaft) is the national physical society of Austria. History Until 1938, Austrian physicists were part of the German Physical Society. On 13 December 1950, it was decided to found a separate society for Austria and Fritz Kohlrausch was elected as first president in 1951. Prizes Every year it awards a prize to a promising young physicist. Alternating every year, this is the Ludwig Boltzmann Prize for theoretical physics Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experim ... and the Fritz Kohlrausch Prize for experimental physics. References External linksOfficial website {{authority control Physics societies Scientific organisations based in Austria Scientific organizations established in 1950 1950 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Quantum System
In physics, an open quantum system is a quantum-mechanical system that interacts with an external quantum system, which is known as the ''environment'' or a ''bath''. In general, these interactions significantly change the dynamics of the system and result in quantum dissipation, such that the information contained in the system is lost to its environment. Because no quantum system is completely isolated from its surroundings, it is important to develop a theoretical framework for treating these interactions in order to obtain an accurate understanding of quantum systems. Techniques developed in the context of open quantum systems have proven powerful in fields such as quantum optics, quantum measurement theory, quantum statistical mechanics, quantum information science, quantum thermodynamics, quantum cosmology, quantum biology, and semi-classical approximations. Quantum system and environment A complete description of a quantum system requires the inclusion of the environment. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Julia (programming Language)
Julia is a high-level, dynamic programming language. Its features are well suited for numerical analysis and computational science. Distinctive aspects of Julia's design include a type system with parametric polymorphism in a dynamic programming language; with multiple dispatch as its core programming paradigm. Julia supports concurrent, (composable) parallel and distributed computing (with or without using MPI or the built-in corresponding to "OpenMP-style" threads), and direct calling of C and Fortran libraries without glue code. Julia uses a just-in-time (JIT) compiler that is referred to as "just- ahead-of-time" (JAOT) in the Julia community, as Julia compiles all code (by default) to machine code before running it. Julia is garbage-collected, uses eager evaluation, and includes efficient libraries for floating-point calculations, linear algebra, random number generation, and regular expression matching. Many libraries are available, including some (e.g., for fast Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phase Transition
In chemistry, thermodynamics, and other related fields, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter: solid, liquid, and gas, and in rare cases, plasma. A phase of a thermodynamic system and the states of matter have uniform physical properties. During a phase transition of a given medium, certain properties of the medium change as a result of the change of external conditions, such as temperature or pressure. This can be a discontinuous change; for example, a liquid may become gas upon heating to its boiling point, resulting in an abrupt change in volume. The identification of the external conditions at which a transformation occurs defines the phase transition point. Types of phase transition At the phase transition point for a substance, for instance the boiling point, the two phases involved - liquid and vapor, have identic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marie Skłodowska-Curie Actions
Marie Skłodowska-Curie Actions (MSCA) is a set of major research fellowships created by the European Union/European Commission to support research in the European Research Area (ERA). The Marie Skłodowska-Curie Actions are among Europe's most competitive and prestigious research and innovation fellowships. Established in 1996 as Marie Curie Actions and known since 2014 as Marie Skłodowska-Curie Actions, they aim to foster the career development and further training of researchers at all career stages. The Marie Skłodowska-Curie Actions promote interdisciplinary research and international collaborations, supporting scientists from not only within Europe but also across the globe. Marie Skłodowska-Curie Actions are currently financed through the eighth Framework Programme for Research and Technological Development (called Horizon 2020) and belong to the so-called 'first pillar' of Horizon2020: "Excellent Science." Through this funding scheme, the Research Executive Agency (REA) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akademisches Gymnasium Innsbruck
The Akademisches Gymnasium Innsbruck is a Public school (government funded)#Germany, public Gymnasium (school), gymnasium Grammar School, grammar school in Innsbruck, Tyrol (state), Tyrol, Austria. Founded in 1562 by the Jesuits in the course of the counter-reformation, it is the oldest school in Western Austria and one of the oldest schools in the German-speaking world. History 16th – 17th Century At the beginning of the 16th century, Maximilian I, Holy Roman Emperor, Emperor Maximilian I. intended to establish a latin school in Innsbruck, which would grant access to education for everyone. However, it took almost fifty years until his successor Ferdinand I, Holy Roman Emperor, Emperor Ferdinand I. entrusted the Jesuits under Petrus Canisius with the creation of a church, college and latin school in 1562. It finally opened on 25 June of the same year with 71 pupils (including aristocrats and former pupils of the city's parish school), making it the second oldest Jesuit sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stubaital
The Stubaital is an alpine valley in Tyrol, Austria. It is the central valley of the Stubai Alps. The river Ruetz flows through the valley. This 35-km long valley runs in northeastern direction from the main chain of the Alps to Schönberg im Stubaital, near Innsbruck. Below Fulpmes, the villages lie on terraces above the Ruetz on either side of the river. South of Neustift im Stubaital, the largest side valley Oberbergtal joins from the west. The ÖBB operates a 16- MW hydroelectric power plant in Fulpmes. The following five municipalities lie in the valley: Schönberg im Stubaital, Mieders, Telfes, Fulpmes and Neustift im Stubaital. Public transportation from Innsbruck into the valley is available via the Stubaital bus route or the Stubai Valley Railway, which runs from Innsbruck to Fulpmes. At the end of the Stubaital valley the Stubai Glacier Stubai may mean: * Stubai Alps, (German: Stubaier Alpen), a mountain range in the Central Eastern Alps of Europe * Stubaital, the cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quantum Metrology
Quantum metrology is the study of making high-resolution and highly sensitive measurements of physical parameters using quantum theory to describe the physical systems, particularly exploiting quantum entanglement and quantum squeezing. This field promises to develop measurement techniques that give better precision than the same measurement performed in a classical framework. Together with quantum hypothesis testing, it represents an important theoretical model at the basis of quantum sensing. Mathematical foundations A basic task of quantum metrology is estimating the parameter \theta of the unitary dynamics \varrho(\theta)=\exp(-iH\theta)\varrho_0\exp(+iH\theta), where \varrho_0 is the initial state of the system and H is the Hamiltonian of the system. \theta is estimated based on measurements on \varrho(\theta). Typically, the system is composed of many particles, and the Hamiltonian is a sum of single-particle terms H=\sum_k H_k, where H_k acts on the kth particle. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superradiant Laser
A superradiant laser is a laser that does not rely on a large population of photons within the laser cavity to maintain coherence. Rather than relying on photons to store phase coherence, it relies on collective effects in an atomic medium to store coherence. Such a laser uses repumped Dicke superradiance (or superfluorescence) to sustain emission of light that can have a substantially narrower linewidth than a conventional laser. See also * Dicke model Dicke is a surname. Notable people with the surname include: * Amie Dicke (born 1978), Dutch artist * Finn Dicke (born 2004), Dutch footballer * Pien Dicke (born 1999), Dutch field hockey player * Robert H. Dicke (1916–1997), American physicis ... * Superradiant phase transition References Laser types {{optics-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quantum Thermodynamics
Quantum thermodynamics is the study of the relations between two independent physical theories: thermodynamics and quantum mechanics. The two independent theories address the physical phenomena of light and matter. In 1905, Albert Einstein argued that the requirement of consistency between thermodynamics and electromagnetism leads to the conclusion that light is quantized obtaining the relation E= h \nu . This paper is the dawn of quantum theory. In a few decades quantum theory became established with an independent set of rules. Currently quantum thermodynamics addresses the emergence of thermodynamic laws from quantum mechanics. It differs from quantum statistical mechanics in the emphasis on dynamical processes out of equilibrium. In addition, there is a quest for the theory to be relevant for a single individual quantum system. Dynamical view There is an intimate connection of quantum thermodynamics with the theory of open quantum systems. Quantum mechanics inserts dynamic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Cavity
An optical cavity, resonating cavity or optical resonator is an arrangement of mirrors or other optical elements that forms a cavity resonator for light waves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser light. They are also used in optical parametric oscillators and some interferometers. Light confined in the cavity reflects multiple times, producing modes with certain resonance frequencies. Modes can be decomposed into longitudinal modes that differ only in frequency and transverse modes that have different intensity patterns across the cross-section of the beam. Many types of optical cavity produce standing wave modes. Different resonator types are distinguished by the focal lengths of the two mirrors and the distance between them. Flat mirrors are not often used because of the difficulty of aligning them to the needed precision. The geometry (resonator type) must be chosen so that the beam remains stable, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
