19 research outputs found
Demonstration of a parity-time symmetry breaking phase transition using superconducting and trapped-ion qutrits
Scalable quantum computers hold the promise to solve hard computational
problems, such as prime factorization, combinatorial optimization, simulation
of many-body physics, and quantum chemistry. While being key to understanding
many real-world phenomena, simulation of non-conservative quantum dynamics
presents a challenge for unitary quantum computation. In this work, we focus on
simulating non-unitary parity-time symmetric systems, which exhibit a
distinctive symmetry-breaking phase transition as well as other unique features
that have no counterpart in closed systems. We show that a qutrit, a
three-level quantum system, is capable of realizing this non-equilibrium phase
transition. By using two physical platforms - an array of trapped ions and a
superconducting transmon - and by controlling their three energy levels in a
digital manner, we experimentally simulate the parity-time symmetry-breaking
phase transition. Our results indicate the potential advantage of multi-level
(qudit) processors in simulating physical effects, where additional accessible
levels can play the role of a controlled environment.Comment: 14 pages, 9 figure
ΠΠΠ ΠΠ«Π ΠΠΠ«Π’ ΠΠ‘ΠΠΠΠ¬ΠΠΠΠΠΠΠ― Β«ΠΠΠΠΠΠΠΠΠΠ ΠΠ’ΠΠΠΒ» ΠΠ Π ΠΠΠΠ ΠΠ¦ΠΠ NORWOOD β SANO
HighlightsThe article presents a unique clinical case of correction of hypoplastic left heart syndrome with Norwood procedure using a βKemAngioprosthesisβ vascular xenograft as a Sano shunt.Β AbstractWe present the first successful clinical case of using the βKemAngioprosthesisβ vascular xenograft in the pulmonary position as the Sano shunt in the Norwood procedure for correction of hypoplastic left heart syndrome. A newborn baby (gestation period of 38 weeks) diagnosed with congenital heart disease, and hypoplastic left heart syndrome was admitted to the Research Institute for Complex Issues of Cardiovascular Diseases. The child survived the first stage of the modified Norwood procedure (Sano shunt) using a biological vascular prosthesis. This clinical case showed that using the βKemAngioprosthesisβ vascular xenograft in Norwood procedure to modify pulmonary blood flow by creating an anastomosis between the right ventricle and bifurcation of the pulmonary artery is effective and safe in the short-term period.ΠΡΠ½ΠΎΠ²Π½ΡΠ΅ ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡΠ ΡΡΠ°ΡΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ ΡΠ½ΠΈΠΊΠ°Π»ΡΠ½ΡΠΉ ΡΠ»ΡΡΠ°ΠΉ Π³Π΅ΠΌΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠΎΡΡΠ΅ΠΊΡΠΈΠΈ ΡΠΈΠ½Π΄ΡΠΎΠΌΠ° Π³ΠΈΠΏΠΎΠΏΠ»Π°Π·ΠΈΠΈ Π»Π΅Π²ΡΡ
ΠΎΡΠ΄Π΅Π»ΠΎΠ² ΡΠ΅ΡΠ΄ΡΠ°. ΠΡΠΈ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ Norwood Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΡΠ½ΡΠ° Sano ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ ΡΠΎΡΡΠ΄ΠΈΡΡΡΠΉ ΠΊΡΠ΅Π½ΠΎΠ³ΡΠ°ΡΡ Β«ΠΠ΅ΠΌΠΠ½Π³ΠΈΠΎΠΏΡΠΎΡΠ΅Π·Β» (ΠΠΠ Β«ΠΠ΅ΠΎΠΠΎΡΒ», ΠΠ΅ΠΌΠ΅ΡΠΎΠ²ΠΎ).Β ΠΠ±ΡΡΡΠ°ΠΊΡΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ ΠΏΠ΅ΡΠ²ΡΠΉ ΡΡΠΏΠ΅ΡΠ½ΡΠΉ ΠΎΠΏΡΡ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ Π°ΡΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π°ΡΡΠΎΠ³ΡΠ°ΡΡΠ° Β«ΠΠ΅ΠΌΠΠ½Π³ΠΈΠΎΠΏΡΠΎΡΠ΅Π·Β» Π² Π»Π΅Π³ΠΎΡΠ½ΠΎΠΉ ΠΏΠΎΠ·ΠΈΡΠΈΠΈ ΠΏΡΠΈ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ Norwood β Sano, Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΠΎΠΉ Π½Π° Π³Π΅ΠΌΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΡΡ ΠΊΠΎΡΡΠ΅ΠΊΡΠΈΡ ΡΠΈΠ½Π΄ΡΠΎΠΌΠ° Π³ΠΈΠΏΠΎΠΏΠ»Π°Π·ΠΈΠΈ Π»Π΅Π²ΠΎΠ³ΠΎ ΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠ°. Π ΠΠΠ ΠΠΠ‘Π‘Π ΠΏΠΎΡΡΡΠΏΠΈΠ» Π½ΠΎΠ²ΠΎΡΠΎΠΆΠ΄Π΅Π½Π½ΡΠΉ ΡΠΎ ΡΡΠΎΠΊΠΎΠΌ Π³Π΅ΡΡΠ°ΡΠΈΠΈ 38 Π½Π΅Π΄. Ρ Π΄ΠΈΠ°Π³Π½ΠΎΠ·ΠΎΠΌ: Π²ΡΠΎΠΆΠ΄Π΅Π½Π½ΡΠΉ ΠΏΠΎΡΠΎΠΊ ΡΠ΅ΡΠ΄ΡΠ°, ΡΠΈΠ½Π΄ΡΠΎΠΌ Π³ΠΈΠΏΠΎΠΏΠ»Π°Π·ΠΈΠΈ Π»Π΅Π²ΡΡ
ΠΎΡΠ΄Π΅Π»ΠΎΠ² ΡΠ΅ΡΠ΄ΡΠ°. Π Π΅Π±Π΅Π½ΠΊΡ ΡΡΠΏΠ΅ΡΠ½ΠΎ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ ΠΏΠ΅ΡΠ²ΡΠΉ ΡΡΠ°ΠΏ Π³Π΅ΠΌΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠΎΡΡΠ΅ΠΊΡΠΈΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Norwood β Sano Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠ΄ΠΈΡΡΠΎΠ³ΠΎ ΠΏΡΠΎΡΠ΅Π·Π°. ΠΠ°Π½Π½ΡΠΉ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠ»ΡΡΠ°ΠΉ ΠΏΠΎΠΊΠ°Π·Π°Π», ΡΡΠΎ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Β«ΠΠ΅ΠΌΠΠ½Π³ΠΈΠΎΠΏΡΠΎΡΠ΅Π·Π°Β» ΠΏΡΠΈ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ Norwood β Sano Π΄Π»Ρ ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ Π»Π΅Π³ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΡΠΎΠ²ΠΎΡΠΎΠΊΠ° ΠΏΡΡΠ΅ΠΌ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ Π°Π½Π°ΡΡΠΎΠΌΠΎΠ·Π° ΠΌΠ΅ΠΆΠ΄Ρ ΠΏΡΠ°Π²ΡΠΌ ΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠΎΠΌ ΠΈ Π±ΠΈΡΡΡΠΊΠ°ΡΠΈΠ΅ΠΉ Π»Π΅Π³ΠΎΡΠ½ΠΎΠΉ Π°ΡΡΠ΅ΡΠΈΠΈ ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΠΌ ΠΈ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΡΠΌ Π² Π³ΠΎΡΠΏΠΈΡΠ°Π»ΡΠ½ΠΎΠΌ ΠΏΠ΅ΡΠΈΠΎΠ΄Π΅
Design and Implementation of an Augmented RFID System
Ultra high frequency (UHF) radio frequency identification (RFID) systems suffer from
issues that limit their widespread deployment and limit the number of applications where
they can be used. These limitations are: lack of a well defined read zone, interference,
and environment sensitivity. To overcome these limitations a novel receiver device is
introduced into the system. The use of such device or devices mitigates the issues by
enabling more "anchor points" in the system. Two such devices exist in industry and
academia: the Astraion Sensatag and the Gen2 Listener. The drawbacks of the Sensatag
is that it offers poor performance in capturing tag signals. The Gen2 Listener is based
on the expensive software defined radio hardware.
The purpose of the thesis was to develop a receiver that will enable several new
RFID applications that are not available with current RFID systems. The receiver,
named ARR (Augmented RFID Receiver), receives tag and reader signals, which are
decoded by an FPGA and the results are reported through Ethernet. This device is
central to the augmented RFID system. To show the suitability of such an approach, the
performance of the implementation was compared to the other two outlined solutions. A
comparison of the read rate and range of the implementations were the defining factors.
The analysis showed that the ARR is capable of receiving tag signals with a read rate of
50% for passive and 66% for semi-passive tags at a one meter distance and is capable of
receiving tag signals at a maximum of 3.25 meters for passive and 5.5 meters for semi-
passive tags, with the reader being within 8 meters of the ARR. Two applications were
implemented to showcase the ARR: an RFID portal and protocol analyzer
Intercepting UHF RFID signals through synchronous detection
Abstract
Recently, augmented ultrahigh frequency radio-frequency identification (UHF RFID) systems have been developed, and they contain additional components that can detect a tagβs backscattered response and use this information for the localization of the tag and other applications. The methods currently employed either have poor performance because the detection of the tagβs response is based on envelope detection or are costly because they are based on software-defined radio. The solution proposed in the paper is to use a method called synchronous detection to intercept tag signals. Using synchronous detection, we were able to use a conventional UHF RFID reader integrated circuit for the method, leading to a cost-effective, high-performance solution. We performed an analysis of its read rate and read range performance. The analysis showed that our receiver is capable of receiving tag signals with a read rate of 50% for passive and 66% for semi-passive tags at a 1-m distance between the tag and the receiver and is capable of receiving tag signals at a maximum distance between the tag and the receiver of 3.25 m for passive and 5.5 m for semi-passive tags, with the reader being within 8 m of the receiver. This augmented RFID system has a potential to facilitate localization and prevent the cross-read problem in RFID-based portals. In addition, it can be used as a protocol analyzer as well as a component of future Internet of Things
Methods of constructing a neural network for detecting abnormalities in data processing in the smart field application system
The modern methods of analytics of user actions are considered; developed an algorithm for processing custom events for the SAP system; developed a neural network algorithm and analyzed its work results; options for improving the model are proposed
Robot for strip spraying of vegetable crops
The article deals with the problem of reducing the use of agrochemicals through the use of strip spraying using robotic tools that increase the uniformity and accuracy of the distribution of pesticides. The proposed design of the strip spraying module is based on the principle of consistent development of unified modular components in order to change the basic characteristics of the robotic complex. The use of a robotic complex for strip spraying of vegetable crops during treatment with pesticides or liquid mineral fertilizers will ensure an improvement in the quality of plant processing, a reduction in the hectare consumption of the working solution and a negative impact on the environment
Explosion and Dynamic Transparency of Low-Density Structured Polymeric Targets Irradiated by a Long-Pulse KrF Laser
The hydrodynamics of plasma formed in the interaction of 100 ns UV KrF laser pulses with foam targets with volume densities from 5 to 500 mg/cm3 was studied. Initial and dynamic transmittance at 248 nm wavelength were measured. At intensities of about 1012 W/cm2, the propagation rates of radiation through foam targets reached 80 km/s, while plasma stream velocities from both the front and rear sides of targets were approximately the same, ~ 75 km/s, which confirms a volumetric absorption of radiation within the target thickness and the explosive nature of the plasma formation and expansion