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ردیف | عنوان | نوع |
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1 |
Design of an Integrated Bell-State Analyzer on a Thin-Film Lithium Niobate Platform
طراحی یک آنالایزر حالت زنگ یکپارچه بر روی بستر نازک لیتیوم نیوبات-2022 Trapped ions are excellent candidates for quantum
computing and quantum networks because of their long coherence
times, ability to generate entangled photons as well as high fidelity
single- and two-qubit gates. To scale up trapped ion quantum
computing, we need a Bell-state analyzer on a reconfigurable platform that can herald high fidelity entanglement between ions. In
this work, we design a photonic Bell-state analyzer on a reconfigurable thin-film lithium niobate platform for polarization-encoded
qubits.We optimize the device to achieve high fidelity entanglement
between two trapped ions and find >99% fidelity. Apart from
that, the directional coupler used in our design can achieve any
polarization-independent power splitting ratio which can have a
rich variety of applications in the integrated photonic technology.
The proposed device can scale up trapped ion quantum computing
as well as other optically active spin qubits, such as color centers
in diamond, quantum dots, and rare-earth ions.
Index Terms: Bell-state analyzer | thin-film lithium niobate | scalable quantum computing | trapped ions | entanglement | polarization qubits | polarization-independent directional coupler. |
مقاله انگلیسی |
2 |
Generation of Truly Random Numbers on a Quantum Annealer
تولید اعداد واقعا تصادفی در یک آنیلر کوانتومی-2022 This study investigates how qubits of modern quantum annealers (QA) such as D-Wave can be
applied for generating truly random numbers. We show how a QA can be initialised and how the annealing
schedule can be set so that after the annealing, thousands of truly random binary numbers are measured in
parallel. Those can then be converted to uniformly distributed natural or real numbers in desired ranges,
either biased or unbiased. We discuss the observed qubits’ properties and their influence on the random
number generation and consider various physical factors that influence the performance of our generator,
i.e., digital-to-analogue quantisation errors, flux errors, temperature errors and spin bath polarisation. The
numbers generated by the proposed algorithm successfully pass various tests on randomness from the NIST
test suite. Our source code and large sets of truly random numbers will be made publicly available on our
project web page.
INDEX TERMS: Random numbers | true randomness test | superconducting flux qubits | quantum annealing | QUBO |
مقاله انگلیسی |
3 |
Quantum Computing: Fundamentals, Implementations and Applications
محاسبات کوانتومی: مبانی، پیاده سازی و کاربردها-2022 Quantum Computing is a technology, which promises to overcome the drawbacks of conventional CMOS technology for high density and high performance applications. Its potential to revolutionize
today’s computing world is attracting more and more researchers towards this field. However, due to the
involvement of quantum properties, many beginners find it difficult to follow the field. Therefore, in this
research note an effort has been made to introduce the various aspects of quantum computing to researchers,
quantum engineers and scientists. The historical background and basic concepts necessary to understand
quantum computation and information processing have been introduced in a lucid manner. Various physical
implementations and potential application areas of quantum computation have also been discussed in this
paper. Recent developments in each realization, in the context of the DiVincenzo criteria, including ion
traps based quantum computing, superconducting quantum computing, nuclear magnetic resonance (NMR)
quantum computing, spintronics and semiconductor based quantum computing have been discussed.
INDEX TERMS: Quantum Computing | Quantum Computer | Qubit | Quantum Gates | Spin transfer torque (STT) | Quantum Cryptography. |
مقاله انگلیسی |
4 |
Quantum Control of Optically Active Artificial Atoms With Surface Acoustic Waves
کنترل کوانتومی اتم های مصنوعی فعال نوری با امواج صوتی سطحی-2022 Surface acoustic waves (SAWs) are a versatile tool for realizing coherent quantum interfaces
between various solid-state qubits spanning microwave to optical frequencies. Through strain, electric, or
magnetic fields associated with acoustic waves, qubit states can be controlled and measured with exquisite
precision for applications in quantum information processing, memory, transduction, and sensing. In this
review, we discuss progress toward quantum control using surface acoustic waves coupled to optically active
artificial atoms, including semiconductor quantum dots (QDs), optically addressable solid-state spins, and
quantum emitters in van der Waals materials. We outline the device, material, and theoretical considerations
for realizing interactions with surface acoustic waves in the quantum regime, summarize the state of the art in
coupling surface acoustic waves to artificial atoms, and provide insight into the current trends and trajectory
of the field.
INDEX TERMS: Quantum dots (QDs) | quantum networking and communications | surface acoustic waves (SAWs). |
مقاله انگلیسی |
5 |
SpinQ Triangulum: A commercial three-qubit desktop quantum computer
SpinQ Triangulum: یک کامپیوتر کوانتومی رومیزی سه کیوبیتی تجاری-2022 SPINQ TRIANGULUM IS THE SEC- ond generation of the desktop quantum computers designed and manufactured by SpinQ Technology. SpinQ’s desk- SpinQ Triangulum
top quantum computer series, based on
a room-temperature nuclear magnetic
resonance (NMR) spectrometer, provides lightweight, cost-effective, and
maintenance-free quantum computing
platforms that aim to provide real-device
experience for quantum computing education for kindergarten through 12th
grade (K–12) and the college level. These
platforms also feature quantum control
design capabilities for studying quantum
control and quantum noise.
|
مقاله انگلیسی |
6 |
Superconducting and Silicon-Based Semiconductor Quantum Computers: A review
کامپیوترهای کوانتومی نیمه هادی ابررسانا و مبتنی بر سیلیکون: مرور-2022 QUA NTUM COMPUTER S A R E
based on the theory of quantum
mechanics, and their powerful parallel
data processing capability is expected
to solve many mathematical problems
that too are difficult to be handled by
classical computers. Especially with the
increase of data processing volume, the
quantum advantage is more obvious.
Among the many physical systems for
quantum computers, superconducting
quantum circuit and semiconductor
quantum dot computers show amazing potential due to their compatibility
with traditional integrated circuit process technology and ultrashort gating
time of nanoseconds. Superconducting
qubits consisting of Josephson junctions
and superconducting coplanar capacitors are easily integrated into a large
scale for their simple circuit structure and conventional semiconductor process compatibility. Semiconductor
qubits made from isotopically purified
silicon (Si)-based materials greatly suppress nuclear spin noise, and decoherence times of ultralong milliseconds can
be achieved. In this article, we systematically describe the challenges faced
by superconducting qubits and semiconductor qubits in hot issues such as
error correction and decoherence and
look into the future development of
superconducting quantum computers and Si-based semiconductor quantum computers.
keywords: |
مقاله انگلیسی |
7 |
Biometric characteristics of Trachinus araneus Cuveir, 1829, Trachinus draco Linnaeus, 1758 and Trachinus radiatus Cuveir, 1829 (Pisces; Trachinidae) from the Egyptian Mediterranean waters
Biometric characteristics of Trachinus araneus Cuveir, 1829, Trachinus draco Linnaeus, 1758 and Trachinus radiatus Cuveir, 1829 (Pisces; Trachinidae) from the Egyptian Mediterranean waters-2021 The biometric characteristics of Trachinus araneus, Trachinus draco and Trachinus radiatus from the Egyptian Mediterranean waters at the West of Alexandria City, were studied. In total, 105, 96 and 55 specimens of these three Fish species were sampled, respectively, by the use of bottom trawls operated in the sectors of El-Dabaa and Sidi Abd El Rahman. The morphological characteristic and related index ratio were determined. The results showed that T. araneus total length varied from 10.9 to 30.0 cm TL with mean length of 19.87 ± 5.43 cm TL and a number of horizontal dots appear to be distributed along the lateral line, T. draco total length was 11.8 to 27.6 cm TL with a mean length of 17.85 ± 4.23 cm TL, and specimens of this Fish species showed yellow vertical oblique lines on the body. On the other hand, T. radiatus is characterized by a total length of 10.6 to 35.0 cm TL with a mean length 18.04 ± 4.87 cm TL, and by circular brown dots spread on the whole body and head. Furthermore, these three Fish species have poisonous spines, one on each operculum, and both spines on the internal border of the dorsal part of each eye orbit. The morphometric regression of each morphometric character showed close agreement between the observed and calculated values.© 2021 National Institute of Oceanography and Fisheries. Hosting by Elsevier B.V. This is an open accessarticle under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Keywords: Biometric | Characteristics | Trachinus araneus | Trachinus draco | Trachinus radiatus | Mediterranean waters | Egypt |
مقاله انگلیسی |
8 |
Optimizing the electrical conductivity of polyacrylonitrile/polyaniline with nickel nanoparticles for the enhanced electrostimulation of Schwann cells proliferation
بهینه سازی رسانایی الکتریکی پلی اکریلونیتریل/پلی آنیلین با نانوذرات نیکل برای تحریک الکتریکی افزایش یافته تکثیر سلول های شوان-2021 Tissue engineering scaffolds made of biocompatible polymers are promising alternatives for nerve reparation. For this application, cell proliferation will be speeded up by electrostimulation, which required
electrically-conductive materials. Here, a biomimicking scaffold with optimized conductivity was developed from electrospun polyacrylonitrile/electrically-conductive polyaniline (PAN/PANI) nanofibers
doped with Ni nanoparticles. PAN/PANI/Ni was biocompatible for Schwann cells and exhibited a suitable
tensile strength and wettability for cell proliferation. When compared with unmodified PAN/PANI, the
electrical conductivity of PAN/PANI/Ni was 6.4 fold higher. Without electrostimulation, PAN/PANI and
PAN/PANI/Ni exhibited similar Schwann cells’ proliferation rates. Upon electrostimulation at
100 mV cm1 for one hour per day over five days, PAN/PANI/Ni accelerated Schwann cells’ proliferation
2.1 times compared to PAN/PANI. These results demonstrate the importance of expanding the electrical
conductivity of the tissue engineering scaffold to ensure optimal electrostimulation of nerve cell growth.
Additionally, this study describes a straightforward approach to modulate the electrical conductivity of
polymeric materials via the addition of Ni nanoparticles that can be applied to different biomimicking
scaffolds for nerve healing.
Keywords: Nerve tissue engineering | Electrospinning | PAN/PANI | Ni nanoparticles | Schwann cells |
مقاله انگلیسی |
9 |
تشخیص BECT اسپایک براساس ویژگیهای توالی EEG Novel و الگوریتم های LSTM
سال انتشار: 2021 - تعداد صفحات فایل pdf انگلیسی: 10 - تعداد صفحات فایل doc فارسی: 35 صرع خوشخیم با امواج spinous در منطقه زمانی ۲ ( BECT ) یکی از شایعترین syndromes مبتلا به صرع در کودکان است که به طور جدی رشد سیستم برای کودکان را تهدید میکند . مشخصترین ویژگی ۵ BECT وجود تعداد زیادی از electroencephalogram ۶ ( EEG ) در ناحیه Rolandic در طول دوره interictal است که یک اساس مهم برای کمک به neurologists در BECT diag8 است . با توجه به این مساله , این مقاله یک الگوریتم تشخیص BECT spike را براساس توالی زمانی سری زمانی EEG ثبت میکند و حافظه کوتاهمدت حافظه بلند مدت ( LSTM ) را نشان میدهد . سه ویژگی متوالی دامنه زمانی , که به وضوح ۱۲ را مشخص میکنند , برای نمایش EEG استخراج میشوند . ۱۳ تکنیک نمونهگیری اقلیت ترکیبی ( smote ) برای ۱۴ سخنرانی در مورد مساله عدم تعادل در EEGs بکار گرفته میشود و ۱۵ - ( BiLSTM ) برای تشخیص سیخ آموزشدیده است . این الگوریتم با استفاده از دادههای EEG ۱۵ BECT ثبتشده از ۱۷ بیمار Hospital ثبتشده از ۱۷ بیمارستان کودکان , دانشکده پزشکی University ۱۸ ( CHZU ) , مورد ارزیابی قرار میگیرد . این آزمایش نشان میدهد که الگوریتم پیشنهادی میتواند به طور متوسط 88.54 % F [ 1] , ۹۲.۰۴ درصد حساسیت , و ۲۰ 85.75 درصد را بدست آورد , که به طور کلی از چندین روش تشخیص استاندارد ویژگی استفاده میکند .
عبارات راهنما: BECT | تشخیص اسپایک | حوزه زمان EEG ویژگی توالی | مدل LSTM
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مقاله ترجمه شده |
10 |
Iron-wu¨stite revisited: A revised calibration accounting for variable stoichiometry and the effects of pressure
Iron-wu¨stite revisited: یک کالیبراسیون تجدید نظر شده برای استوکیومتری متغیر و اثرات فشار-2021 We present thermodynamic and empirical calculations for the iron-wustite (IW) buffer applicable from 100 kPa to 100 GPa
and from 1000 to 3000 K. The thermodynamic calculation self-consistently accounts for changing stoichiometry of ironsaturated wu¨stite as a function of temperature and pressure. In contrast to some previous models for calculating IW at high
pressure, the model incorporates a thermodynamically valid representation of the free energy of stoichiometric FeO at
100 kPa. Earlier high pressure models that relied on the JANAF thermochemical tables (Chase, 1998) were compromised
because JANAF has erroneous values for the properties of FeO. This resulted in predicted oxygen fugacities buffered by
IW that are between 0.2 and 1.1 log units too reducing at 3000 and 1000 K, respectively. The revised thermodynamic calculations indicate that iron-saturated wustite becomes more nearly stoichiometric with increasing pressure, but that this shift
depends on temperature. Near-stoichiometric FeO (y < 0.01, for Fe1-yO) is reached close to 8 GPa at 1000 K and 17 GPa
at 2000 K. An empirical function is presented that accurately reproduces the thermodynamic calculation and facilitates easy
quantification of the fO2 of IW over the full range of temperatures and pressures covered by the model. Some caution is warranted in calculation of IW at high pressures, after FeO undergoes a transition from an insulator to a conductor and where
low spin Fe2+ is stabilized, as the present model does not incorporate the effects of these transitions on the IW buffer.
Keywords: Iron | Wustite | Oxygen fugacity | Buffer | Redox |
مقاله انگلیسی |