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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 94 (1914), S. 172-172 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT might not be altogether inappropriate at this time when the world of true culture is grieving inconsolably over the destruction of the University of Louvain, to be reminded that the originator of the famous cell-theory, Theodore Schwann (1810–82), was for nine years a professor at that ...
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 110 (1922), S. 666-667 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I HAVE only to-day seen Dr. Adrian's letter of September 30 in which he states with great clearness the present-day physical explanation of the nature and transmission of the nerve impulse. It seems to me that it is the relation of this nerve impulse to nerve energy that stands in need of ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 106 (1921), S. 725-726 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] COLOURED thinking is such a peculiar condition that those interested in it will welcome the details of a well-marked case of it. It must be distinguished from linked sensations such as coloured hearing—one of the synæsthesiæ—in which heard sounds call up colours, as when the low notes of the ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 110 (1922), S. 342-343 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE expression “nerve-energy” is widely used both by non-technical writers and by medical and physiological authors as well. What the former mean by it is of no particular moment; but in medical and physiological literature it should connote something quite definite, if indeed the ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 102 (1919), S. 365-366 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] BEFORE the discussion on the physiology of the internal ear is closed, it might be well to direct attention to a point in connection with the supposed necessity of the auditory nerve transmitting the very large number of impulses corresponding with the vibrations constituting musical ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 98 (1916), S. 168-169 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A GOOD deal is being written on the terms of peace and on our attitude towards the Germans after the war in the spheres of pure science, applied science, and industry generally. While these and similar topics are in the melting-pot of controversy, this might be the suitable time to bring up the ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 95 (1915), S. 538-538 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE following allusion to Napoleon having spared the University of Pavia in 1804 on account of the memory of the illustrious man of science, Spallanzani, who had been a professor there, is so interesting at the present time that I venture to bring it under the notice of readers of NATURE. ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 86 (1911), S. 584-584 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE discovery of the capillary blood-vessels being an event of such supreme importance in biology, it is highly desirable that the date of it should be accurately ascertained. It so happens that it is known for certain it was made in the year 1660 by Marcello Malpighi in the city of Bologna, ...
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 96 (1916), S. 619-619 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MAY I have some of your valuable space in order to put a question to physiologists and physicists whom I could not reach so conveniently in any other way? For a long time I have been puzzled by the existence of colourless-white-crystals of haemoglobin. If one carries out the familiar ...
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  • 10
    Publication Date: 2015-10-13
    Description: Exciton-polaritons are hybrid light-matter quasiparticles formed by strongly interacting photons and excitons (electron-hole pairs) in semiconductor microcavities. They have emerged as a robust solid-state platform for next-generation optoelectronic applications as well as for fundamental studies of quantum many-body physics. Importantly, exciton-polaritons are a profoundly open (that is, non-Hermitian) quantum system, which requires constant pumping of energy and continuously decays, releasing coherent radiation. Thus, the exciton-polaritons always exist in a balanced potential landscape of gain and loss. However, the inherent non-Hermitian nature of this potential has so far been largely ignored in exciton-polariton physics. Here we demonstrate that non-Hermiticity dramatically modifies the structure of modes and spectral degeneracies in exciton-polariton systems, and, therefore, will affect their quantum transport, localization and dynamical properties. Using a spatially structured optical pump, we create a chaotic exciton-polariton billiard--a two-dimensional area enclosed by a curved potential barrier. Eigenmodes of this billiard exhibit multiple non-Hermitian spectral degeneracies, known as exceptional points. Such points can cause remarkable wave phenomena, such as unidirectional transport, anomalous lasing/absorption and chiral modes. By varying parameters of the billiard, we observe crossing and anti-crossing of energy levels and reveal the non-trivial topological modal structure exclusive to non-Hermitian systems. We also observe mode switching and a topological Berry phase for a parameter loop encircling the exceptional point. Our findings pave the way to studies of non-Hermitian quantum dynamics of exciton-polaritons, which may uncover novel operating principles for polariton-based devices.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gao, T -- Estrecho, E -- Bliokh, K Y -- Liew, T C H -- Fraser, M D -- Brodbeck, S -- Kamp, M -- Schneider, C -- Hofling, S -- Yamamoto, Y -- Nori, F -- Kivshar, Y S -- Truscott, A G -- Dall, R G -- Ostrovskaya, E A -- England -- Nature. 2015 Oct 22;526(7574):554-8. doi: 10.1038/nature15522. Epub 2015 Oct 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 2601, Australia. ; Center for Emergent Matter Science, RIKEN, Wako-shi, Saitama 351-0198, Japan. ; School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore. ; Technische Physik and Wilhelm-Conrad-Rontgen Research Center for Complex Material Systems, Universitat Wurzburg, Am Hubland, D-97074 Wurzburg, Germany. ; SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UK. ; ImPACT Project, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan. ; Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305-4085, USA. ; Physics Department, University of Michigan, Ann Arbor, Michigan 48109-1040, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26458102" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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