Elu, loodus, teadus ja tehnoloogia
Author(s): Brian Batell, Rouven Essig, and Ze’ev Surujon
Using 30 year old electron beam-dump data, stringent new constraints are placed on the parameter space of dark photons – recently proposed hypothetical force carriers between dark matter particles.
[Phys. Rev. Lett. 113, 171802] Published Tue Oct 21, 2014
Author(s): Freddy Cachazo, Song He, and Ellis Ye Yuan A new formula for the scattering of massless particles may simplify predictions and analyses of LHC experiments and shed new light on quantum gravity theories.[Phys. Rev. Lett. 113, 171601] Publish…
Author(s): Italo Guarneri, Giulio Casati, and Volker Karle
Features thought to be unique to quantum dynamical systems, such as localization of momentum, are found in a classical kicked rotor – where particles move in a ring and are ‘kicked’ periodically by an external field that changes the particle’s momentum.
[Phys. Rev. Lett. 113, 174101] Published Mon Oct 20, 2014
Author(s): Lee A. Rozema, Dylan H. Mahler, Alex Hayat, Peter S. Turner, and Aephraim M. Steinberg A technique that packs the full content of three bits of quantum information into two may be a space saver for quantum computers.[Phys. Rev. Lett. 113, 1…
Author(s): C. H. Lui, A. J. Frenzel, D. V. Pilon, Y.-H. Lee, X. Ling, G. M. Akselrod, J. Kong, and N. Gedik
Ultrafast optical excitation of doped MoS2 causes a pronounced transient decrease in its conductivity, due to strong many-body interactions in the material that convert the 2D electron gas into a trion gas.
[Phys. Rev. Lett. 113, 166801] Published Thu Oct 16, 2014
Author(s): Simon Caron-Huot and Johannes M. Henn A relativistic quantum field theory extension to the classical Kepler problem provides a new method to compute the bound states of massive W bosons in planar N=4 super Yang-Mills.[Phys. Rev. Lett. 113, 1…
Author(s): D. Sheng, A. Kabcenell, and M. V. Romalis
Progress has been made in understanding systematic effects from thermal and magnetic field gradients on comagnetometers – devices that compare the nuclear spin procession of two atomic species.
[Phys. Rev. Lett. 113, 163002] Published Thu Oct 16, 2014
Author(s): Yuhe Zhang, G. J. Sreejith, N. D. Gemelke, and J. K. Jain
A method is proposed that would allow fractional statistics to be measured experimentally using a pair of atoms immersed in a specifically tailored quantum many-body state.
[Phys. Rev. Lett. 113, 160404] Published Thu Oct 16, 2014
Author(s): Bharath Srivathsan, Gurpreet Kaur Gulati, Alessandro Cerè, Brenda Chng, and Christian Kurtsiefer
The temporal pulse shape of a single photon can be engineered, from an exponential decay to an exponential rise, using a Fabry-Perot optical cavity. This ‘shaping’ would make it easier to couple photons to atoms in a cavity.
[Phys. Rev. Lett. 113, 163601] Published Wed Oct 15, 2014
Author(s): J. Hlinka The family of vector-like quantities is expanded from four to eight using symmetry arguments. These new vectors may be useful for describing systems including chiral objects, topological defects, or magnetic vortices.[Phys. Rev. Le…
Author(s): R. Aaij et al. (LHCb Collaboration) The LHCb collaboration has observed the first spin-3 resonance containing a heavy quark produced in the decay of the bottom-hadron Bs0.[Phys. Rev. Lett. 113, 162001] Published Tue Oct 14, 2014
Author(s): Ning Zhou, Zepyoor Khechadoorian, Daniel Whiteson, and Tim M. P. Tait
A reanalysis of LHC data from a supersymmetry search provides new constraints on the Higgs branching ratio to invisible particles, which are possibly related to dark matter.
[Phys. Rev. Lett. 113, 151801] Published Fri Oct 10, 2014
Author(s): M. D. Mestayer et al. (CLAS Collaboration)
Strange quark–anti-quark pairs are less likely to be produced in hadronic collisions than their light quark counterparts, providing insight into color confinement in QCD.
[Phys. Rev. Lett. 113, 152004] Published Fri Oct 10, 2014
Author(s): Brian D. Fields, Stuart L. Shapiro, and Jessie Shelton
Simple dark matter and astrophysical models can’t explain a gamma-ray signal from our Galaxy’s center.
[Phys. Rev. Lett. 113, 151302] Published Thu Oct 09, 2014
Author(s): Chih-Pin Lu, Guohong Li, K. Watanabe, T. Taniguchi, and Eva Y. Andrei
Molybdenum disulfide may provide an ideal substrate for supporting graphene.
[Phys. Rev. Lett. 113, 156804] Published Thu Oct 09, 2014
21.oktoobril 2014 tähistame esmakordselt Eestis Fotoonika päeva, kui ootame ootame kõiki teaduse- ja tehnoloogiahuvilisi TÜ Physicumi, kus toimuvad huviloengud, demonstratsioonkatsed ning ringkäigud. Sõna „fotoonika“ saadakse sõnast footon, mis omakorda on valguse osake. Fotoonika hõlmab laiemas tähenduses kõiki valguse manipuleerimist kasutavaid tehnilisi lahendusi, mille hulka kuuluvad näiteks teemad nagu LED-valgustus, kaasaegne päikesepaneelide tehnoloogia, laserid, sensorid, optilised […]
Author(s): Johan Åberg
A scheme is proposed to perform a unitary operation on a multi-level system, without degrading the coherence of the external system.
[Phys. Rev. Lett. 113, 150402] Published Tue Oct 07, 2014
Author(s): Genevieve Gariepy, Jonathan Leach, Kyung Taec Kim, T. J. Hammond, E. Frumker, Robert W. Boyd, and P. B. Corkum
A laser field carrying orbital angular momentum can drive nonlinear high harmonic generation in a gas, potentially forming an extreme ultraviolet beam having applications in molecular scale microscopy.
[Phys. Rev. Lett. 113, 153901] Published Tue Oct 07, 2014
Selles videos on näeb TÜ Füüsika Instituudi uue hoone kerkimist Tartus, Ravila 14C. Maja avamine toimub 25.08.2014.
The space pavilion will feature the wealth of ESA and German national programmes across all space domains, focusing on recent mission results and upcoming launches.
The space pavilion will feature the wealth of ESA and German national programmes across all space domains, focusing on recent mission results and upcoming launches.
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Valmisid Eesti Füüsika Seltsi ja GLOBE Eesti eestvedamisel 2012.aastal toimunud Eesti õhusaaste mõõtmise projekti lõpparuanded. Projektis osales 25 Eesti kooli, mõõdeti tahma ning NO2, O3, NH3, SO2 sisaldust õhus. Lõppraport on koostatud kahes osas: Õhu tahmasisalduse mõõtmise raport; Passiivsete kogujatega tehtud saasteainete mõõtmise lõppraport.
The largest dust storm to be seen on Mars since NASA’s Mars Global Surveyor spacecraft arrived in 1997 is currently raging across about half the planet.
A discovery that may someday help measure how clouds and earthquakes change Earth’s rotation has come from an experiment that made friction-free helium whistle.
Philadelphia, where the Declaration of Independence was signed 225 years ago on July 4, 1776, lies in the center of a new image from a NASA Earth-observing satellite.
NASA’s 2001 Mars Odyssey spacecraft fine-tuned its flight path for arrival at Mars in October as it performed its second trajectory correction maneuver this morning.
An analysis of the interaction patterns in an online conference from a distance education graduate course was conducted, using an approach that focused on the transcript’s interactional and structural features. A new tool for transcript analysis, the T…
