122,152 research outputs found
From quantum stochastic differential equations to Gisin-Percival state diffusion
No full textStarting from the quantum stochastic differential equations of Hudson and Parthasarathy Commun. Math. Phys. 93, 301 (1984) and exploiting the Wiener-Itô-Segal isomorphism between the boson Fock reservoir space �(L2(�+)�(�n��n)) and the Hilbert space L2(μ), where μ is the Wiener probability measure of a complex n-dimensional vector-valued standard Brownian motion (B(t),t�0), we derive a non-linear stochastic Schrödinger equation describing a classical diffusion of states of a quantum system, driven by the Brownian motion B. Changing this Brownian motion by an appropriate Girsanov transformation, we arrive at the Gisin-Percival state diffusion equation N. Gisin and J. Percival, J. Phys. A 167, 315 (1992). This approach also yields an explicit solution of the Gisin-Percival equation, in terms of the Hudson-Parthasarathy unitary process and a randomized Weyl displacement process. Irreversible dynamics of system density operators described by the well-known Gorini-Kossakowski-Sudarshan-Lindblad master equation is unraveled by coarse-graining over the Gisin-Percival quantum state trajectories. © 2017 Author(s)
Collembolen aus der Sammlung C. Börner des Deutschen Entomologischen Instituts (Apterygota). I. Deutschland und angrenzende Länder.
No full textEs werden 6 Arten als neu für die Wissenschaft beschrieben (Onychiurus raxensis, O. franconianus, O. trinotatus, O. arminiarius, Tomocerus mixtus, Bourletiella setigera) und 17 andere zum ersten Mal aus Deutschland gemeldet (im Text durch vorangestelltes * gekennzeichnet). Ferner liefert der Autor wesentliche Beiträge zur Taxonomie folgender 6 Arten: Hypogastrura tullbergi, H. boldorii, Neanura oniscoides, Onychiurus franzi, Isotoma duodecimoculata, Tomocerus minutus, und stellt ein neues Synonym auf: Orchesella viridilutea Stach, 1960 = O. frontimaculata Gisin, 1946.RésuméSix espèces inédites sont décrites (Onychiurus raxensis, O. franconianus, O. trinotatus, O. arminiarius, Tomocerus mixtus, Bourletiella setigera) et 17 autres sont signalées pour la première fois d\u27Allemagne (celles ci sont marquées d\u27un * dans le texte). Des contributions importantes à la taxonomie concernent six espèces: Hypogastrura tullbergi, H. boldorii, Neanura oniscoides, O. franzi, Isotoma duodecimoculata, Tomocerus minutus. Enfin l\u27auteur établit une nouvelle synonymie: Orchesella viridilutea Stach, 1960 = O. frontimaculata Gisin, 1946.Nomenklatorische Handlungensetiger Gisin, 1961 (Bourletiella (Heterosminthurus)), spec. n.arminiarius Gisin, 1961 (Onychiurus), spec. n.franconianus Gisin, 1961 (Onychiurus), spec. n.raxensis Gisin, 1961 (Onychiurus), spec. n.trinotatus Gisin, 1961 (Onychiurus), spec. n.mixtus Gisin, 1961 (Tomocerus), spec. n.Es werden 6 Arten als neu für die Wissenschaft beschrieben (Onychiurus raxensis, O. franconianus, O. trinotatus, O. arminiarius, Tomocerus mixtus, Bourletiella setigera) und 17 andere zum ersten Mal aus Deutschland gemeldet (im Text durch vorangestelltes * gekennzeichnet). Ferner liefert der Autor wesentliche Beiträge zur Taxonomie folgender 6 Arten: Hypogastrura tullbergi, H. boldorii, Neanura oniscoides, Onychiurus franzi, Isotoma duodecimoculata, Tomocerus minutus, und stellt ein neues Synonym auf: Orchesella viridilutea Stach, 1960 = O. frontimaculata Gisin, 1946.RésuméSix espèces inédites sont décrites (Onychiurus raxensis, O. franconianus, O. trinotatus, O. arminiarius, Tomocerus mixtus, Bourletiella setigera) et 17 autres sont signalées pour la première fois d\u27Allemagne (celles ci sont marquées d\u27un * dans le texte). Des contributions importantes à la taxonomie concernent six espèces: Hypogastrura tullbergi, H. boldorii, Neanura oniscoides, O. franzi, Isotoma duodecimoculata, Tomocerus minutus. Enfin l\u27auteur établit une nouvelle synonymie: Orchesella viridilutea Stach, 1960 = O. frontimaculata Gisin, 1946.Nomenclatural Actssetiger Gisin, 1961 (Bourletiella (Heterosminthurus)), spec. n.arminiarius Gisin, 1961 (Onychiurus), spec. n.franconianus Gisin, 1961 (Onychiurus), spec. n.raxensis Gisin, 1961 (Onychiurus), spec. n.trinotatus Gisin, 1961 (Onychiurus), spec. n.mixtus Gisin, 1961 (Tomocerus), spec. n
Onychiurus cancellatus Gisin 1956
No full text<i>Onychiurus cancellatus</i> Gisin, 1956 <p> <i>Mitteilungen der Schweizerischen Entomologischen Gesellschaft</i>, 29 (4): 338</p> <p> <b>Holotype.</b> Denmark. Eremittagesletten: 1ex. 29.IV.1943 N. Haarløov leg., on slide (NHMD 228947).</p> <p> <b>Current status:</b> Junior synonym of <i>Protaphorura cancellata</i> (Gisin, 1956) (Loksa 1983).</p>Published as part of <i>Eusébio, Rita, Sendra, Alberto, Enghoff, Henrik & Reboleira, Ana Sofia P. S., 2018, Catalogue of the type material in the entomological collection of the Natural History Museum of Denmark: basal hexapods, pp. 201-236 in Zootaxa 4457 (2)</i> on page 226, DOI: 10.11646/zootaxa.4457.2.1, <a href="http://zenodo.org/record/1341991">http://zenodo.org/record/1341991</a>
Improved implementation of the Alicki–Van Ryn nonclassicality test for a single particle using Si detectors
No full textRecently a test of nonclassicality for a single qubit was proposed [R. Alicki and N. Van Ryn, J. Phys. A: Math. Theor. 41, 062001 (2008)]. We present an optimized experimental realization of this test leading to a 46 standard deviation violation of classicality. This factor of 5 improvement over our previous result was achieved by moving from the infrared to the visible where we can take advantage of higher efficiency and lower noise photon detectors
A New Genus and Species of Isotomidae (Collembola), and a Redescription of \u3ci\u3eCryptopygus Exilus\u3c/i\u3e (Gisin) N. Comb
No full textA new genus and species of Collembola in the family lsotomidae are described from Michigan: Micranurophorus musci n. g., n. sp. A redescription of Cryptopygus exilis (Gisin) (= Isotomina exilis Gisin) is also given, based on specimens from Michigan. The new genus is characterized by the lack of a furcula and by abdominal chaetotaxy similar to Isotomodes. It is related to Pseudanurophorus
Ceratophysella engadinensis Gisin 1949
No full text5. Ceratophysella cf. engadinensis (Gisin, 1949) * Name in source. Ceratophysella gr. denticulata in Deharveng et al. (1989), Hypogastrura (Ceratophysella) cf. engadinensis in Bedos (1994). Source: Deharveng et al. (1989), Bedos (1994). Distribution in Thailand. Chiang Mai (N). Habitat: litter at 2500 m. in Doi Inthanon forest. Distribution outside Thailand. C. engadinensis is probably Palaearctic.Published as part of Jantarit, Sopark, Bedos, Anne & Deharveng, Louis, 2016, An annotated checklist of the Collembolan fauna of Thailand, pp. 301-360 in Zootaxa 4169 (2) on page 307, DOI: 10.11646/zootaxa.4169.2.4, http://zenodo.org/record/26580
Protaphorura bicampata Gisin 1956
No full textProtaphorura bicampata (Gisin, 1956) Figs 1–14 Onychiurus bicampata Gisin, 1956: 344 Material examined. 3 males on slides, China: Jiamusi city: Fujin county: Huasheng village (47 ° 16 ’N, 132 °06’E), 0 7 August 2010, litter and soil under Populus davidiana Dode, Wu Donghui et al. leg (LD- 10-499); 1 female on slide, China: Heilongjiang province: Harbin city: Fangzheng county: Demoli (45 ° 52 ’N, 129 °02’E), 0 6 August 2010, litter and soil, Wu Donghui et al. leg. (LD- 10-474); 1 female on slide, China: Heilongjiang province: Linjiang city (48 º04’N, 133 º 32 ’E), litter and soil under Betula costata Trautv., 9 August 2012, Wu Donghui et al. leg. (LD- 10-483); 1 female on slide, China: Inner Mongolia: Hulunbuir: Genhe City (50 ° 44 ’N, 121 ° 30 ’E), 20 September 2013, soil in the mixed coniferous and broad leaved forest, Wu Donghui et al. leg.; 2 males on slides, China: Jilin province: Baishan City: Hunjiang (41 ° 55 ’N, 126 ° 22 ’E), 0 1 September 2009, litter and soil, Wu Donghui leg.; 1 female and 1 male on slides, China: Heilongjiang province: Maoershan National Forest Park (45 ° 24 ’N, 127 ° 40 ’E), litter and soil in the mixed coniferous and broad leaved forest, 0 1 June 2013, Gao Meixiang leg. (GMX-MES- 2013). Remarks. We have described specimens of P. bicampata basing on the material from Heilongjiang (Honghe Farm and Xinqing national forest park) and Jilin (Manjiang) in 2013 (Sun et al. 2013 b). As more and more specimens being checked from northeast China, P. bicampata is found widespread in this area and its characters have some interspecific variations: psx present or absent on the subcoxa 1 of legs; the inner tooth on unguis present or absent and the anal spines shorter (about 0.6 times) or as long as inner edge of unguis. These variations were also found in Poland (Pomorski 1998), Eastern Europe and Tuva Republic (Kaprus’pers. comm.).Published as part of Sun, Xin, Chang, Liang & Wu, Donghui, 2015, New species and new records of Protaphorura species from northeast China (Collembola: Onychiuridae), pp. 381-392 in Zootaxa 3920 (2) on page 382, DOI: 10.11646/zootaxa.3920.2.9, http://zenodo.org/record/23831
Reduced randomness in quantum cryptography with sequences of qubits encoded in the same basis
No full textPolarization mode dispersion for single-mode fibers with polarization dependent losses
No full textBirefringent single-mode fibers with random polarization mode coupling and polarization dependent losses are considered. The effect of these losses on polarization mode dispersion (PMD) is computed. The relevant number is found to be the differential loss between both polarization modes over one coupling length. For polarizing fibers, the coupling length is of several kilometers, the relevant number is thus high, and the PMD is significantly reduced by the differential loss. For standard fibers, on the other hand, the coupling length is of several tens of meters, the relevant number is thus small and polarization dependent losses have a negligible effect on the PMD. © 1993.LPMGroup of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland Bibos, Physik Fakultät, Universität Bielefeld, W-4800 Bielefeld, GermanyCited By (since 1996): 4Export Date: 6 December 2012Source: ScopusCODEN: OPCOBLanguage of Original Document: EnglishCorrespondence Address: Gisin, N.; Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerlan
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
- …
