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Wyświetlanie 1-15 z 54
Tytuł:
Thuja ×soeegaardii (Cupressaceae) – a new name for an old hybrid
Autorzy:
Kosinski, P.
Tomaszewski, D.
Zielinski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2130188.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Thuja ‘Green Giant’
Horsholm Arboretum
Bent Søegaard
allopatric hybridization
Opis:
Thuja ×soeegaardii, a hybrid of Th. plicata Donn ex D.Don and Th. standishii (Gordon) Carrière, is described as a new nothospecies from the Kórnik Arboretum, Poland, based on plants obtained in 1988 from the Botanical Garden in Gothenburg, Sweden. The hybrid was found for the first time at the Hørsholm Arboretum, Denmark, in 1938, among seedlings grown from seeds collected from Thuja standishii. Plants grown from rooted scions of this hybrid were planted in several places within the Hørsholm Arboretum. Soon, the hybrid plants were gifted to the Botanical Gardens in Copenhagen and Gothenburg as well to the Poulsen’s Plant Nursery in Kvistgård. In 1967 seedlings were sent from Kvistgård to the National Arboretum in Washington, where one of them developed into a particularly showy, lush and vigorous plant characterized by a dense, narrow, conical crown. The offspring obtained from rooted scions turned out to be very drought and wind-resistant, especially suitable for the formation of tall hedges and windbreak screens. This plant, now very widespread in cultivation, especially in the United States, goes by the name of Thuja ‘Green Giant’. In terms of morphology, many features of Th. ×soeegaardii are intermediate as compared to the parent species. From the Th. plicata, it differs by the following characteristics: leaves not or only weakly shining above, lateral leaves with inwardly curved (not straight) apices, the apical part of lower central leaves thickened and slightly bent from the stem (not appressed), glands on central leaves only weakly visible, central leaves of primary shoots acuminate (not long acuminate) and seed wings sparsely papillose in the upper part (only rarely smooth). From Th. standishii, it can be distinguished by the less glaucous upper leaf surface, the less protruding apical part of lower central leaves, at least faintly visible glands on central leaves, acuminate (not acute) central leaves of primary shoots and less distinctly papillose upper part of seed wings.
Źródło:
Dendrobiology; 2022, 87; 113-121
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fatigue life prediction for acid-resistant steel plate under operating loads
Autorzy:
Tomaszewski, T.
Strzelecki, P.
Wachowski, M.
Stopel, M.
Powiązania:
https://bibliotekanauki.pl/articles/200215.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reliability
macrofractography
finite element analysis
S-N curve
acid-resistant steel
Opis:
The paper evaluates the causes related to the fatigue damage in a conveyor slide plate, exposed to high-frequency cyclic loads. The plate was made of 1.4301 acid-resistant steel. The fractography showed that the plate failure was caused by fatigue crack. A nonlinear analysis of plate deformation was conducted using the finite element method (FEA) in LS-Dyna software. The maximum normal stresses in the plate fracture were used in further analysis. A “fatigue limit” calculated initially using a FITNET procedure was above the maximum stress calculated using FEA. It indicates that the structural features of the plate were selected correctly. The experimental test results for 1.4301 acid-resistant steel were described using a probabilistic Weibull distribution model. Reliability was determined for the obtained S-N curve at 50% and 5% failure probability allowing for the selected coefficients (cycle asymmetry, roughness, variable load) and the history of cyclic loading. Cumulative damage was determined using the Palmgren-Miner hypothesis. The estimated fatigue life was similar to the actual value determined in the operating conditions for the S-N curve at 5% failure probability. For engineering calculations, the S-N curve at max. 5% failure probability is recommended.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 913-921
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical and experimental analysis of balloon angioplasty impact on flow hemodynamics improvement
Autorzy:
Tomaszewski, Michał
Sybilski, Kamil
Małachowski, Jerzy
Wolański, Wojciech
Buszman, Piotr P.
Powiązania:
https://bibliotekanauki.pl/articles/27324133.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
angioplasty
stent
artery
hemodynamics
cfd analysis
PIV method
angioplastyka
tętnica
hemodynamika
analiza CFD
metoda PIV
Opis:
Purpose: The paper focuses on the numerical and experimental evaluation of the fluid flow inside chosen fragments of blood vessels. In the first stage of the study, the experimental tests were conducted using a research test stand, designed to be used in this evaluation. The study evaluated the blood flow through a silicone vessel with an implanted coronary stent. Methods: The PIV method was used in order to visualize the flow vectors inside a silicone vessel. Deformed vessel geometry implemented for computational fluid dynamics purposes was obtained owing to a non-linear simulation of the stent expansion (angioplasty process) in a silicone vessel. Additionally, a vessel model with a statistical 55% area stenosis and an irregular real vessel with an atherosclerotic plaque were also subjected to analysis from the hemodynamic flow point of view. A vessel with a statistical stenosis was also used to simulate the angioplasty process, which resulted in obtaining a flow domain for the vessel with an atherosclerotic plaque after the stent implantation. Results: For each case, distributions of parameters such as OSI or TAWSS were also analyzed and discussed. The areas of low TAWSS values appear close to the stent struts. Conclusions: Stents with increased diameters, compared to the normal vessel diameter, create a higher risk of occurrence of the areas with low WSS values. Excessive stent deformation can cause inflammation by injuring the vessel and can initiate the restenosis and thrombotic phenomena through the increased vessel diameter.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 3; 169--183
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Siedliskowe uwarunkowania występowania wątrobowca Frullania dilatata w Wigierskim Parku Narodowym (północno-wschodnia Polska)
Habitat characteristics which determine liverwort Frullania dilatata occurrence in the Wigry National Park (north-eastern Poland)
Autorzy:
Gorski, P.
Tomaszewski, D.
Powiązania:
https://bibliotekanauki.pl/articles/2118640.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
epiphytes
humidity
temperature
Frullania dilatata
Wigry National Park
Polska
Opis:
The aim of the article was to verify the hypothesis that humidity, temperature and light con- ditions play a fundamental role in the distribution of Frullania dilatata within the forest complexes in the Wigry National Park. 41 monitoring localities were selected in places of epiphytic liverworts occurrence (22 sites with F. dilatata, 19 – without these plant). Humidity and temperature were recorded hourly during one year. Light conditions on the tested sites were determined on the basis of hemispherical photos. Additional parameters were calculated based on the digital terrain model in the SagaGis program. The results indicate that the hypothesis is false.
Źródło:
Steciana; 2019, 23, 4; 41-49
1689-653X
Pojawia się w:
Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania reakcji nitrowania toluenu za pomocą mieszaniny kwas azotowy(V)/dichlorometan
Nitration of toluene by a nitric(V) acid/dichloromethane mixture
Autorzy:
Nastała, A.
Maksimowski, P.
Tomaszewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/92685.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
selektywnie nitrowanie
nitrotoluen
kwas azotowy(V)/dichlorometan
selective nitration
nitrotoluene
nitric(V) acid/dichloromethane
Opis:
W wyniku przeprowadzonych badań zbadany został wpływ różnych czynników na reakcję nitrowania toluenu przy użyciu 100% kwasu azotowego(V) i mieszaniny kwas azotowy(V)/ dichlorometan. Na podstawie otrzymanych wyników stwierdzono, że zawartość izomeru meta maleje wraz z obniżeniem temperatury reakcji. W przypadku zakresu temperatur (25 ÷ –10) °C zawartość tego izomeru w produktach reakcji była niższa niż dla analogicznego zakresu w przypadku 100% kwasu azotowego(V). Z kolei w zakresie (–20 ÷ –30) °C wyniki dla obu czynników nitrujących były podobne i wynosiły około 2,6% m-nitrotoluenu. Przy nitrowaniu mieszaniną kwas azotowy(V)/dichlorometan należy stosować znacznie większy nadmiar kwasu azotowego(V) niż w przypadku 100% kwasu azotowego(V). Reakcja nitrowania mieszaniną kwas azotowy(V)/dichlorometan jest znacznie mniej egzotermiczna i łatwiejsza w kontroli niż nitrowanie 100% kwasem azotowym.
This work has studied the effects on the nitration of toluene by 100% nitric(V) acid and a nitric(V) acid/dichloromethane mixture. The results show that the amount of meta-nitrotoluene decreases with decreases in reaction temperature. From 25 °C to –10 °C the amount of metanitrotoluene was less than for nitrating toluene by a nitric(V)acid/dichloromethane mixture than for nitration by 100% nitric(V) acid. Furthermore, from –20 °C to –30 °C results were similar with 2.6% of meta-nitrotoluene in the reaction products. An excess of nitric(V) acid in the nitration of toluene by the nitric(V) acid/dichloromethane mixture than in nitration by 100% nitric(V) acid. Nitration by the nitric(V) acid/dichloromethane mixture is less exothermic and easier to control than nitration by 100% nitric(V) acid.
Źródło:
Materiały Wysokoenergetyczne; 2018, T. 10; 46-58
2083-0165
Pojawia się w:
Materiały Wysokoenergetyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modyfikowanie HTPB (α,ω-dihydroksypolibutadienu) w reakcjach estryfikacji, silanizacji, epoksydacji i uwodornienia
Modification of HTPB (α,ω-dihydroxypolibutadiene) by esterification, silanization, epoxidation and hydrogenation
Autorzy:
Chmielarek, M.
Maksimowski, P.
Gołofit, T.
Cieślak, K.
Pawłowski, W.
Tomaszewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/92704.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
α, ω-dihydroksypolibutadienu
HTPB
modyfikacje HTPB
pochodne HTPB
hydroxyl-terminated polybutadiene
modification of HTPB
HTPB derivatives
Opis:
α,ω-Dihydroksypolibutadien (HTPB) jest cennym komonomerem do otrzymywania poliuretanów. Dzięki swoich specyficznym właściwościom, nadaje tym tworzywom mrozoodporność i świetne właściwości mechaniczne, szczególnie w niskich temperaturach. Tak otrzymywane poliuretany znajdują zastosowanie w produkcji stałych paliw rakietowych używanych w napędach rakiet kosmicznych i wojskowych, a także są podstawą mrozoodpornych klejów i lepiszcz oraz materiałów izolacyjnych. Współczesne badania nad doborem lepiszcza wskazują na zastosowanie polimerów wysokoenergetycznych lub modyfikacji dotychczas stosowanych polimerów polepszających ich właściwości. W nowoczesnych rakietowych materiałach pędnych polimerowe lepiszcze, może zostać zastąpione odpowiednim wysokoenergetycznym związkiem chemicznym, czyli polimerem z wbudowanymi grupami energetycznymi, takimi jak azydkowa lub nitrowa. W prezentowanym artykule przedstawione zostaną wyniki badań nad takimi sposobami modyfikacji HTPB, które zapewnią jego rozszerzoną aplikację.
HTPB is a valuable comonomer for the preparation of polyurethanes. Thanks to its specific properties, it gives these materials frost resistance and excellent mechanical properties, especially at low temperatures. The polyurethanes thus obtained are used in the production of propellants used in space and military rocket propulsion, and are the basis for frost-resistant adhesives and insulating materials. Research on the selection of binder indicates the use of high energy polymers or modifications of previously used polymers improving their properties. The results of research on ways of changing the properties of HTPB through its modification and thus an increase of application possibilities will be presented.
Źródło:
Materiały Wysokoenergetyczne; 2018, T. 10; 30-45
2083-0165
Pojawia się w:
Materiały Wysokoenergetyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of selected mathematical models of high-cycle S-N characteristics
Autorzy:
Strzelecki, P.
Sempruch, J.
Tomaszewski, T.
Powiązania:
https://bibliotekanauki.pl/articles/298416.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
high-cycle fatigue
S-N curve
fatigue tests
number of specimen
steel strength
Opis:
The paper presents two approaches of determining S-N fatigue characteristics. The first is a commonly used and well-documented approach based on the least squares method and staircase method for limited fatigue life and fatigue limit, accordingly. The other approach employs the maximum likelihood method. The analysis of the parameters obtained through both approaches exhibited minor differences. The analysis was performed for four steel construction materials, i.e. C45+C, 45, SUS630 and AISI 1045. It should be noted that the quantity of samples required in the second approach is significantly smaller than with the first approach, which translates into lower duration and costs of tests.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2017, 20(3); 227-240
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The efficiency of tram articulations compared to vibroacoustic emissions
Autorzy:
Nowakowski, T.
Komorski, P.
Tomaszewski, F.
Powiązania:
https://bibliotekanauki.pl/articles/223827.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tram articulations
sound quality
vibrations
squealing noise
przeguby tramwajowe
jakość dźwięku
wibracje
hałas
Opis:
Human quality of life is constantly increasing, and so does the comfort of travel by various means of public transport, especially rail transport. One of the more crucial criteria for assessment of travel comfort is vibroacoustic comfort. This aspect is also substantial among rail vehicle operators and manufacturers. Sound quality evaluation is related to psychoacoustic indicators, but reducing the levels of acoustic pressure does not always correlate to increased quality of the perceived sound and improvement of human sound perception. Moreover the cause of unpleasant noise has to be taken into consideration. In many examples it is induced by specific vibrations and/or friction forces through components. The following article presents experimental research carried out in the in-situ conditions, testing the quality of work carried out by tram articulations considering vibroacoustic emissions. Several measurements were taken of vibroacoustic signals in several urban rail vehicles of the same type. Two different trams were chosen for analysis and their vibroacoustic emission levels as well as sound quality parameters were compared. One of the more crucial aspects of the research was to determine the dependency between vibrations around the area of articulations and squealing noise. The results indicate a large correlation between signals and deterioration in the work quality of the articulation in the given tram. Moreover, the authors suggest expanding on currently carried out maintenance in order to minimise inconvenient vibroacoustic phenomena during use.
Źródło:
Archives of Transport; 2017, 44, 4; 55-63
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Akademicki Związek Sportowy przy Uniwersytecie Stefana Batorego w Wilnie - zarys działalności
The Student Sports Association of Stephen Bathory University in Vilnius - outline of the activities
Autorzy:
Tomaszewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/4601.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
historia
Akademicki Zwiazek Sportowy
Uniwersytet Stefana Batorego w Wilnie
sport
studenci
lata 1921-1939
dzialalnosc statutowa
Opis:
W artykule przybliżono dzieje Akademickiego Związku Sportowego działającego w Wilnie przy Uniwersytecie Stefana Batorego od 1921 do 1939 r. Tekst przede wszystkim ukazuje historię AZS, jego rozwój i to, na jakie trudności natrafiał. Artykuł ma charakter syntezy porządkującej rozproszoną wiedzę na temat działającego przy USB Akademickiego Związku Sportowego. Przedstawiono historię poszczególnych sekcji AZS i ukazano najważniejsze osiągnięcia sportowe oraz zaprezentowano najważniejszych działaczy i sportowców AZS.
The purpose of this article is to present the activities of the Academic Sports Association in Vilnius, but, above all, to show how it developed between 1920–1939 and what challenges and difficulties their members were facing. The author tries to answer the research question whether the sporting achievements of academic athletes connected with the USB were known and recognized outside the region of Vilnius.
Źródło:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna; 2016, 15, 2
1895-8680
Pojawia się w:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Influence of Silicon Substrate Parameters on a Responsivity of MOSFET-Based Terahertz Detectors
Autorzy:
Kucharski, K.
Zagrajek, P.
Tomaszewski, D.
Panas, A.
Głuszko, G.
Marczewski, J.
Kopyt, P.
Powiązania:
https://bibliotekanauki.pl/articles/1186027.pdf
Data publikacji:
2016-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
85.30.Tv
85.60.Gz
42.79.Pw
Opis:
Silicon n-channel MOS transistors are a promising solution for sub-terahertz radiation detection. Their sensitivity is strongly related to the device construction. A type and thickness of the device substrate are key parameters affecting the responsivity, because the silicon substrate is a medium for the radiation propagation and the radiation energy loss, which degrades the detection efficiency. This work is aimed at analysis of the silicon substrate characteristics effect on operation of the MOSFETs as the terahertz radiation sensors. A manufacturing of the MOSFETs on three different substrate types including changing the substrate thickness is described in the paper. Next, the fabricated devices were exposed to THz radiation and their photoresponses were measured. It may be concluded that MOSFETs on silicon-on-insulator wafers with locally thinned substrates demonstrate the highest photoresponse. However, the experiments with the MOSFETs on high resisivity wafers give also promising results.
Źródło:
Acta Physica Polonica A; 2016, 130, 5; 1193-1195
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palladium Catalyst in the HBIW Hydrodebenzylation Reaction. Deactivation and Spent Catalyst Regeneration Procedure
Autorzy:
Maksimowski, P.
Gołofit, T.
Tomaszewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/358843.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
HBIW hydrodebenzylation
palladium-based catalyst
Pd/C deactivation
spent Pd/C catalyst regeneration
Opis:
The polycyclic nitramine 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12- hexaazaisowurtzitane (HNIW, CL-20) is synthesized via hydrodebenzylation of 2,4,6,8,10,12-hexabenzyl-2,4,6,8,10,12-hexaazaisowurtzitane (HBIW) over a palladium-based catalyst. This process is the key step in the synthesis of CL-20, a compound with unique energetic and explosive characteristics. The use of CL-20 is restricted at present by the high cost of the hydrodebenzylation process, during which the palladium-based catalyst becomes rapidly deactivated. The catalyst deactivation has now been shown to consist of deposition of the reaction products on the carbon support with simultaneous blocking of the active centers by these products. The HBIW decomposition products can permanently combine with palladium, thereby reducing the number of the active centers on the catalyst. Other byproducts clog the pores of the active carbon and reduce both the surface area of the active carbon and the pore volume. The reaction yield is also reduced by aggregation of palladium particles. A palladium catalyst regeneration procedure which has now been developed, consists of heating the catalyst for a specific time at 350 °C in a nitrogen and water vapour stream, and allows partial recovery of the activity of the palladium catalyst in a subsequent HBIW hydrodebenzylation reaction. The specific area and overall pore volume of the regenerated catalyst are also enhanced. The yield from the HBIW hydrodebenzylation reaction using the regenerated catalyst was ca. 42%.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 2; 333-348
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association of socio-economic and demographic factors with physical activity of males and females aged 20–69 years
Autorzy:
Biernat, E.
Tomaszewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/51174.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2015, 22, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dizziness - pathogenesis, diagnosis and treatment
Autorzy:
Tomaszewski, M.
Banakiewicz, K.
Jajko, K.
Szypowski, R.
Zieliński, P.
Zalewski, G.
Olchowik, G.
Powiązania:
https://bibliotekanauki.pl/articles/2052447.pdf
Data publikacji:
2015
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
dizziness
labyrinth
internal ear
Opis:
Dizziness is a symptom of many diseases. Patients very frequently come with such ailment to the hospital emergency department. It is a state which may last a few seconds or minutes and increase or recede with time. Therefore, the admitted patients frequently cannot assess their own illness in a precise and objective way. The dizziness definition is also quite ambiguous. Dizziness is defined as the sensation of one own’s body movement or spinning and movement of the surrounding. It is very important to record the patient’s medical history since the diagnostic procedure may depend on the symptoms’ character. Dizziness may be a symptom of a serious disease, although it is not easy to find its cause. It appears not only in case of the labyrinth and nervous system disorders, but also in the systemic and functional diseases. Dizziness and balance disorder are the direct cause of admitting one in every thirty patients. The symptom indicated the directly life-threatening disease only within the 3-8.5% of patients (cerebral circulation insufficiency - 6%, cardiac dysrhythmia – 1.5%, brain tumour < 1%). Analyzing the data concerning the problem of dizziness occurrence within the general population, it has been noticed that this symptom has been reported two or three times more frequent by women than by men. Dizzinesses are classified pathogenetically and clinically into labyrinthine and non-labyrinthine, paroxysmal and permanent, acute and chronic. Dizziness is hard to diagnose because the symptoms reported by patients are only their own subjective sensations. The data presented in the article implicate the increasing number of patients with such disorders. Apart from dizziness, the patients complain also about the hearing disorders and nausea, which make their proper functioning impossible. It is inappropriate to start the treatment without knowing the cause. Establishing, on the basis of patient’s medical history and physical examination, whether the dizziness is of peripheral or central origin, is essential for the further diagnosis. After establishing the main diagnosis, the casual and symptomatic treatment is implemented, in some cases - there is a vestibular rehabilitation or even a surgical treatment.
Źródło:
Health Problems of Civilization; 2015, 09, 1; 11-17
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Entanglement Detection by Current Measurements in Double Quantum Dot System
Autorzy:
Busz, P.
Rożek, P.
Tomaszewski, D.
Martinek, J.
Powiązania:
https://bibliotekanauki.pl/articles/1386781.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.67.Mn
03.67.Bg
73.23.-b
Opis:
The development of quantum computing in quantum dots systems requires highly efficient and continuous solid-state source of spatially separated spin-entangled electrons. One of the approaches is a use of double quantum dot system connected to superconducting lead, where Cooper pairs provide a source of naturally entangled electrons. Apart from the source, an useful tool for detection of quantum entanglement is needed. We present entanglement detection by the ferromagnetic electrodes using entanglement witness operator method and direct measurement of spin polarized current in the system. We investigate requirements that have to be fulfilled by ferromagnetic detectors.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 490-492
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 54

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