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How Much Information is in a Quantum State? Updated: 2009-05-26 23:00:00 Description: People often talk about the quantum state of n entangled particles as if it contained an amount of information exponential in n. Sometimes, they draw the conclusion from this that quantum mechanics must be an extravagant theory valid only for simple ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Serving Astrophysics - An Alternative Approach Updated: 2009-05-12 23:00:00 Description: The author of this talk, an astrophysicist by training, had the opportunity, on two occasions, to visit the Hubble Space Telescope (HST) on its Low Earth Orbit as a member of STS-46 and STS-103 Space Shuttle crews. These two visits allowed the execut...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Watching the Dance of the Atoms in Slow-Motion Updated: 2009-05-05 23:00:00 Description: The changes in the atomic configuration underlying chemical reactions, phase transitions and many other fundamental processes in nature take place on a femtosecond (fs) time scale, that is, roughly speaking 10-14 to 10-13 s (1 fs = 10-15s). Ultrafast...more... LISTEN NOW | VIEW CACHE | DOWNLOAD The Two Mysteries of Superconductivity Updated: 2009-04-28 23:00:00 Description: Superconductivity is a most remarkable property of matter, whereby electrons enter spontaneously a state of macroscopic quantum coherence in which electricity flows perfectly. Were this state sustainable at room temperature, our technological world w...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Atoms and Molecules in Rydberg states Updated: 2009-04-21 23:00:00 Description: ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Is the 2000 Watt Society Sustainable? Updated: 2009-04-07 23:00:00 Description: Recently a debate has arisen here at ETH Zurich centering on the question whether the envisaged 2000 Watt Society is inevitable. Why should not we be allowed to use more energy? Would not it be more important to limit greenhouse gas emissions? In thi...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Galileos Discovery of a New World in the Heavens and a New Physics on Earth Updated: 2009-03-31 23:00:00 Description: In the autumn of 1609 Galileo pointed his telescope to the heavens and made six important discoveries. First, the Moon has mountains and craters like the Earth, second, there are many more stars than was believed; third, the Milky Way is a congeries ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD The Large Hadron Collider Updated: 2009-03-24 23:00:00 Description: The Large Hadron Collider (LHC) at CERN is a proton-proton collider with a centre-of-mass energy of 14 TeV. The machine has many novel design features including a twoin- one magnet cooled in superfluid helium at 1.9K. A brief description of the main ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Solving Gauge and String Theories with Integrable Spin Chains Updated: 2009-03-17 23:00:00 Description: The standard model of particle physics is built upon four-dimensional gauge theories. Unfortunately, computations within them are intrinsically hard, and our knowledge is therefore restricted to tiny fractions of their parameter space. In recent year...more... LISTEN NOW | VIEW CACHE | DOWNLOAD X-Rays Shines Light on the Mystery of Water Updated: 2009-03-10 23:00:00 Description: Water is the key compound for our existence on this planet and it is involved in many important physical, chemical, biological and geological processes. Although water is the most common molecular substance it is also the most unusual with many anoma...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Precision Quantum Metrology Updated: 2009-03-03 23:00:00 Description: Quantum state engineering of ultracold matter and precise control of optical fields have allowed accurate measurement of light-matter interactions for applications ranging from precision tests of fundamental physics to quantum information science....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Cavity Optomechanics: Backaction-Cooling of Mechanical Oscillators Updated: 2009-02-24 23:00:00 Description: The mutual coupling of optical and mechanical degrees of freedom via radiation pressure has been a subject of interest in the context of quantum limited displacements measurements for Gravity Wave Detection for many decades. Recent advances in nano- ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD ESO: Present and Future Updated: 2008-12-16 23:00:00 Description: The European Southern Observatory is an intergovernmental organization for astronomy, created in 1962 by Belgium, France, Germany, Sweden and The Netherlands, and today has 14 member states. Headquarters are located in Garching near Munich....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Cold Dark Matter Searches and the XENON Experiment Updated: 2008-12-09 23:00:00 Description: The XENON experiment aims to detect weakly interacting massive particles (WIMPs) via their elastic scattering on Xe nuclei, using a low background, two-phase time projection chamber....more... LISTEN NOW | VIEW CACHE | DOWNLOAD The Quest for the Inner Structure of the Proton Updated: 2008-12-02 23:00:00 Description: Exploring the nature of matter has been of central interest over centuries. In order to study the structure of atoms, protons and neutrons, scattering experiments have become the tool of choice, which have their origin in Rutherfords work in the last...more... LISTEN NOW | VIEW CACHE | DOWNLOAD The Interplanetary Transport Network: Mapping Chaotic Motion Through the Solar System Updated: 2008-11-25 23:00:00 Description: The competing gravitational pull between celestial bodies creates a vast array of passageways that winds around the sun, planets and moons. These corridors are tube-like structures connecting regions of balance in interlinked three body problems....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Coupling MEMS to Photons: an new Approach to Macroscopic Quantum Phenomena Updated: 2008-11-18 23:00:00 Description: Radiation pressure provides a coupling between the electromagnetic field and the center-of-mass motion of macroscopic objects. This coupling offers a promising route towards observing quantum phenomena on surprisingly large scales....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Quantum Private Queries Updated: 2008-11-11 23:00:00 Description: Alice wants to ask Bob a question. Bob wants to give Alice the answer. But there's a catch: Alice doesn't want Bob to know what the question is. Classically, the only ways for Alice to make a provably private query are unwieldy. For example, Alice se...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Entangeled Electrons in the Solid State: Quantum Interference and Dephasing Updated: 2008-11-04 23:00:00 Description: I will describe two experiments, where pairs of electrons were entangled in a solid state Mach-Zehnder interferometer, leading to entirely different outcomes. In one experiment a which path detector was entangled with an interferometer, leading to to...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Solar Neutrino Spectroscopy with BOREXINO at Gran Sasso Updated: 2008-10-28 23:00:00 Description: The physics program of the Borexino experiment at the Gran Sasso underground laboratory focuses on the measurement of low-energy solar neutrinos. Data taking started in May 2007. With the achieved unprecedented radio-purity of the detector materials,...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Coherent X-Ray Imaging and Microscopy for Life Science Applications Updated: 2008-10-21 23:00:00 Description: Visible-light microscopy is a standard and widely used tool with a broad range of applications in science, industry and everyday life. Besides standard bright-field imaging, many more contrast mechanisms have been developed, and dark-field-imaging, p...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Non Abelian Anyons - What they are and How They can be Identified Updated: 2008-10-14 23:00:00 Description: I will describe the non-abelian quantum Hall effect, how its excitations become non-abelian anyons, and how they may be used for topological quantum computation. I will then focus on several proposed experiments that can serve as litmus tests for ide...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Precision Atom Interferometry Updated: 2008-10-07 23:00:00 Description: Atom de Broglie wave interferometry has emerged as a tool capable of addressing a diverse set of questions in gravitational physics, and as an enabling technology for advanced sensors in geodesy and navigation. This talk will review basic principles,...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Engines of Discovery: The Role of Accelerators in Scientific Exploration Updated: 2008-09-30 23:00:00 Description: Hundred and ten years have passed between J.J. Thomson used a cathode ray tube to discover the electron and the start of commissioning of the LHC collider, where protons are accelerated to 7 TeV. This span of nine orders of magnitude in energy allowe...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Entropy: The Mathematical Heritage of Ludwig Boltzmann Updated: 2008-09-23 23:00:00 Description: In this lecture I shall discuss how Boltzmanns treatment of entropy and the second law of thermodynamics, although developed for physical reasons, has found applications in various fields of mathematics and is still at the basis of current research, ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD The Quantum Spin Hall Effect Updated: 2008-09-16 23:00:00 Description: Search for topologically non-trivial states of matter has become an important goal for condensed matter physics. Recently, a new class of topological insulators has been proposed. These topological insulators have an insulating gap in the bulk, but h...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Nuclear Physics, Stellar Explosions and the Abundance Evolution in Galaxies Updated: 2008-05-27 23:00:00 Description: ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Quasiparticle Extinction due to approaching Mottness - the Achilles Heel of High-TcSuperconductivity? Updated: 2008-05-20 23:00:00 Description: ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Nanotechnology Tools for Biology, the Power of Single Molecule Biophysics Updated: 2008-05-13 23:00:00 Description: I will discuss the impact of nanoscience, in particular single-molecule techniques, on biology. Single-molecule tools such as scanning probes, tweezers, and nanostructures provide powerful new entries to study the structure, dynamics and function of ...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Inelastic Electron Scattering off Magnetic Impurities Updated: 2008-05-06 23:00:00 Description: This talk reviews the theory and experiments investigating the electron relaxation in metals with magnetic impurities. Such impurities enhance the energy exchange between electrons and make the electron energy relaxation sensitive to the magnetic fie...more... LISTEN NOW | VIEW CACHE | DOWNLOAD 100 Years of Liquid Helium Updated: 2008-04-22 23:00:00 Description: The first liquifaction of Helium was achieved in the summer of 1908 at the University of Leiden in the Netherlands. This breakthrough gave the decisive impetus for the emerging new branch of low-temperature physics, which was first dominated by rese...more... LISTEN NOW | VIEW CACHE | DOWNLOAD The Quest for Very Low Mass Planets Updated: 2008-04-15 23:00:00 Description: In the last thirteen years, more than 250 exoplanets have been detected. These discoveries have revealed the impressive diversity of exoplanet orbital properties. The past thirteen years have also witnessed a remarkable improvement of the precision o...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Superconducting Interfaces Between Insulating Oxides Updated: 2008-04-08 23:00:00 Description: At interfaces between complex oxides, electronic systems with unusual properties can be generated. As reported first by Ohtomo and Hwang, a highly mobile electron gas is formed at the interface between LaAlO3 and SrTiO3, two insulating dielectric per...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Real and Futuristic Spin Qubits Updated: 2008-04-01 23:00:00 Description: Electrons confined in nanoscale semiconductor islands (quantum dots) occupy quantized orbitals, much like the ectrons bound to an atomic nucleus. This opens prospects for the coherent control of their spin states, and may form the basis for a scalab...more... LISTEN NOW | VIEW CACHE | DOWNLOAD The role of accelerators in understanding the Dark Universe Updated: 2008-03-18 23:00:00 Description: Many key questions in particle physics and cosmology are unanswered today. In particular, some 95% of the Universe consist of unknown dark matter and dark energy....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Challenges and Opportunities of High Field Magnetic Resonance Imaging Updated: 2008-03-11 23:00:00 Description: Magnetic Resonance Imaging (MRI) is a powerful medical imaging technology which has become one of the premier modalities for visualizing anatomy in radiological practice....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Verschraenkung der Physiker Updated: 2008-03-04 23:00:00 Description: Physik zu betreiben bedeutet, Information ueber unsere Natur zu sammeln, zu ordnen und in Form von physikalischen Gesetzen auf moeglichst kompakte Art darzustellen....more... LISTEN NOW | VIEW CACHE | DOWNLOAD The Physics of Dunes Updated: 2008-02-26 23:00:00 Description: Dunes are aerodynamic instabilites that exist in deserts and along coasts. I will present the first set of equations of motions that correctly describes the evolution of a free granular surface under the action of wind and gravity....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Precision Physics with Jet Observables Updated: 2008-02-19 23:00:00 Description: The fundamental building blocks of protons, neutrons, pions and atomic nuclei are quarks and gluons, which interact through the strong interaction....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Particle Tracking in Turbulence Updated: 2007-12-18 23:00:00 Description: Fluid turbulence leads to a dramatic enhancement of transport and mixing and therefore is of great importance in a wide variety of natural and industrial processes from cloud physics to chemical reactors....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Elementary Particles in the Mirror of Space and Time: Violation of Discrete Symmetries Updated: 2007-12-11 23:00:00 Description: The role of symmetries in physics will be introduced with special emphasis on two particular discrete symmetries, viz., the parity operation, P, which inverts spatial coordinates and the time reversal operation, T, which reverses the arrow of time....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Imaging 3D Neural Network Activity: A Glance at the Mesoscopic Scale in Neuroscience Updated: 2007-12-04 23:00:00 Description: Nonlinear optical microscopy tools such as two-photon laser-scanning microscopy offer entirely new and fascinating views on brain dynamics....more... LISTEN NOW | VIEW CACHE | DOWNLOAD From Disks to Planets - Boulders, Gaps, and Traffic Jams Updated: 2007-11-27 23:00:00 Description: The talk will provide a general description how stars and planets form. The journey will start with the stellar nurseries: In the very cold and opaque parts of molecular clouds, the physical conditions allow gravitational collapse to occur....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Abschied von der Weltformel Updated: 2007-11-26 23:00:00 Description: "A Different Universe: Reinventing Physics from the Bottom Down" lautet der Originaltitel des Buches von Physik-Nobelpreistraeger Robert B. Laughlin, das seit kurzem in deutscher Uebersetzung vorliegt. Am 27. November praesentiert der Stanford-Profes...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Quantum Nanoplasmonics and Cellular BASICs for Quantitative Biology and Medicine Updated: 2007-11-20 23:00:00 Description: Cellular Biological Application Specific Integrated Circuits (BASICs) have been developed for quantitative systems biology and molecular medicine....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Physics Across the Energy Frontier Updated: 2007-11-13 23:00:00 Description: Besides the four well known fundamental forces (gravity, electromagnetism, the weak interaction and the strong one) additional dynamics must exist in nature....more... LISTEN NOW | VIEW CACHE | DOWNLOAD One-Electron Quantum Cyclotron Determines the Electron Magnetic Moment and the Fine Structure Constant Updated: 2007-11-06 23:00:00 Description: A single electron is suspended by itself for months in the magnetic field of a Penning trap. Its cyclotron motion is cooled to the point where the quantum structure in this motion manifests itself as the energy levels of an artificial atom - the elec...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Schroedingers Mirrors: Quantum Experiments with Micro-Mechanical Systems Updated: 2007-10-30 23:00:00 Description: The quantum regime of mechanical systems offers fascinating new possibilities for both applied and fundamental physics....more... LISTEN NOW | VIEW CACHE | DOWNLOAD QED in a Pencil Trace Updated: 2007-10-23 23:00:00 Description: When one writes with a pencil, thin flakes of graphite are left on the surface making a dark trace. Some of these flakes turn out to be only one atom thick and can be viewed as individual atomic planes pulled out from bulk graphite....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Physics for Safety in the Mountains Updated: 2007-10-16 23:00:00 Description: The principal threat to safety in the mountains are gravitationally induced mass movements: snow avalanches, debris flow, land slides, or rock avalanches. Physics can contribute to many safety measures by understanding the process-initiation and -dyn...more... LISTEN NOW | VIEW CACHE | DOWNLOAD Graphene - Electronic Structure of an Intriguing Material Updated: 2007-10-09 23:00:00 Description: Graphene, the single sheet of carbon atoms which is the building block of graphite and carbon nanotubes, has recently attracted a great deal of attention because of its unusual transport properties....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Particle Acceleration by the Sun Updated: 2007-10-02 23:00:00 Description: The Sun accelerates ions up to tens of GeV and electrons to hundreds of MeV in two distinct physical processes. Solar flares release up to 1020 kWh in a few minutes, with possibly more than half of this energy in accelerated particles....more... LISTEN NOW | VIEW CACHE | DOWNLOAD Deterministic Quantum Mechanics Updated: 2007-09-25 23:00:00 Description: The differences between the quantum world and the classical world appear to be so sound, that attempts at a deterministic interpretation of quantum mechanics are usually dismissed....more... 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