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

ПЕРВЫЙ ОПЫТ ИСПОЛЬЗОВАНИЯ «КЕМАНГИОПРОТЕЗА» ПРИ ОПЕРАЦИИ NORWOOD – SANO

HighlightsThe article presents a unique clinical case of correction of hypoplastic left heart syndrome with Norwood procedure using a “KemAngioprosthesis” vascular xenograft as a Sano shunt. AbstractWe present the first successful clinical case of using the “KemAngioprosthesis” 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 “KemAngioprosthesis” 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.Основные положенияВ статье представлен уникальный случай гемодинамической коррекции синдрома гипоплазии левых отделов сердца. При операции Norwood в качестве шунта Sano использован сосудистый ксенографт «КемАнгиопротез» (ЗАО «НеоКор», Кемерово). АбстрактПредставлен первый успешный опыт применения артериального аутографта «КемАнгиопротез» в легочной позиции при операции Norwood – Sano, направленной на гемодинамическую коррекцию синдрома гипоплазии левого желудочка. В НИИ КПССЗ поступил новорожденный со сроком гестации 38 нед. с диагнозом: врожденный порок сердца, синдром гипоплазии левых отделов сердца. Ребенку успешно выполнен первый этап гемодинамической коррекции методом Norwood – Sano с использованием биологического сосудистого протеза. Данный клинический случай показал, что применение «КемАнгиопротеза» при операции Norwood – Sano для модификации легочного кровотока путем создания анастомоза между правым желудочком и бифуркацией легочной артерии является эффективным и безопасным в госпитальном периоде

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 tag’s 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 tag’s 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

Using 3D Imaging to Preoperatively Plan Facelift Procedures for the Lower Third of the Face and Neck

The pursuit of youth and attractiveness is a fundamental desire in contemporary society. For many individuals, the appearance of visible signs of aging, such as skin laxity, gravitational changes in facial and neck soft tissues, and loss of harmonious proportions, can be psychologically distressing. The choice of effective methods for addressing these changes depends on their specific characteristics, the patient’s anatomical features, and the type of facial aging. The introduction of 3D imaging to determine the hyoid bone level, the volume of soft tissue structures in the cervico-mental area, ptosis of subplatysmal structures, and the volume of submandibular glands, in addition to ultrasound study of the submental projection at the preoperative stage, are key for making the best decisions regarding preoperative planning. This case report aims to illustrate how modern imaging techniques are a fundamental part of the preoperative assessment of the mid and lower third of the face to ensure the most favorable aesthetic outcomes for each patient