The Quantum Advantage in Binary Teams and the Coordination Dilemma: Part I

We have shown that entanglement assisted stochastic strategies allow access to strategic measures beyond the classically correlated measures accessible through passive common randomness, and thus attain a quantum advantage in decentralised control. In this two part series of articles, we investigate the decision theoretic origins of the quantum advantage within a broad superstructure of problem classes. Each class in our binary team superstructure corresponds to a parametric family of cost functions with a distinct algebraic structure. In this part, identify the only problem classes that benefit from quantum strategies. We find that these cost structures admit a special decision-theoretic feature -- `the coordination dilemma'. Our analysis hence reveals some intuition towards the utility of non-local quantum correlations in decentralised control.Comment: 12 pages, 1 figure, journa

The Quantum Advantage in Decentralized Control

It is known in the context of decentralised control that there exist control strategies consistent with the requirements of a given information structure, yet physically unimplementable through any amount of passive common randomness. This imposes a natural set of limitations on what is achievable through common randomness in both cooperative and competitive settings. We show that it is possible to breach these limitations with the use of quantum-physical architectures. In particular, we present a class of stochastic strategies that leverage quantum entanglement to produce strategic distributions which compose a strict superclass of strategies implemented through passive common randomness. We investigate numerically, the `quantum advantage' offered by this new class over a parametric family of cooperative decision problems with static information structure. We demonstrate through variations across the parametric family that fundamental decision theoretic elements such as information and the cost determine the manifestation of quantum advantage in a given control problem. Our work motivates a novel decision and control paradigm with an enlarged space of control policies achievable by means of quantum architectures

The Quantum Advantage in Binary Teams and the Coordination Dilemma: Part II

In our previous work, we have shown that the use of a quantum architecture in decentralised control allows access to a larger space of control strategies beyond what is classically implementable through common randomness, and can lead to an improvement in the cost -- a phenomenon we called the quantum advantage. In the previous part of this two part series, we showed, however, that not all decision problems admit such an advantage. We identified a decision-theoretic property of the cost called the `coordination dilemma' as a necessary condition for the quantum advantage to manifest. In this article, we investigate the impact on the quantum advantage of a scalar parameter that captures the extent of the coordination dilemma. We show that this parameter can be bounded within an open interval for the quantum advantage to exist, and for some classes, we precisely identify this range of values. This range is found to be determined by the information of the agents.Comment: 12 pages, journa

Abnormal uterine bleeding in a woman with caesarean scar defect (isthmocele): a case report

The caesarean scar defect generally is described as a triangular or circular sonographically anechoic area in the myometrium of the anterior lower uterine segment or cervix at the site of a previous caesarean section. Caesarean section is one of the most commonly performed surgeries and the trend is increasing in the recent years. One long-term complication of caesarean delivery which is not often discussed is the presence of a defect within the uterine scar that is directly associated with a type of abnormal uterine bleeding (AUB) referred to as postmenstrual bleeding. In addition to AUB, presented as pelvic pain, dyspareunia, dysmenorrhea, unexplained infertility. Caesarean scar defect is one such cause of AUB which is overlooked as the history of caesarean section will be many years ago. One such case of woman presenting with abnormal uterine bleeding and pain in abdomen with caesarean defect who was managed in our tertiary care centre reported here

Hyperandrogenism-insulin resistance-acanthosis nigricans syndrome with PCOS and Hashimoto’s thyroiditis: case report

Female hyperandrogenism is a frequent motive of consultation. It is revealed by hirsutism, acne or seborrhea, and disorders in menstruation cycle combined or not with virilisation signs. Several etiologies are incriminated but the hyperandrogenism-insulin resistance-acanthosis nigricans syndrome is rare. A 21-year female, having had a three-year-old secondary amenorrhea, known case of hypothyroidism since 4 years on medication. The exam revealed a patient, hypertensive with blood pressure at 170/110 mmHg with a Body Mass Index (BMI) at 40.08 (Obese Class-3, as per WHO 2004) and a waist measurement of 106cm, a severe hirsutism assessed to be 27 according to Ferriman and Gallwey scale, acanthosis nigricans behind the neck and elbows. The assessment carried out revealed testosteronemia at 1.07 ng/mL, which is more than twice the upper normal of the laboratory. Imaging studies revealed enlarged right adrenal gland, hepatomegaly with fatty infiltration of grade-1 also bilateral polycystic ovaries. The retained diagnosis is HAIR-AN syndrome with polycystic ovaries, hypertension, type-II diabetes mellitus, hypothyroidism since last 4-years and dyslipidemia and was provided with metformin 500 mg thrice daily, spironolactone 25 mg twice daily, atorvastatin 20 mg once daily, telmisartan 20 mg once daily with continuation of eltroxin 50 Mcg for hypothyroidism. To our knowledge this is the first case report of HAIR-AN syndrome in 21 year old female associated with Hashimoto’s thyroiditis, dyslipidaemia, hypertension and type-2-diabetes and this case also highlights about early diagnosis and management of HAIR-AN Syndrome with PCOS and Hashimoto’s thyroiditis  which could help prevent long-term sequalae such as cardiovascular disease and endometrial cancer and with the advent of knowledge and availability of health resources we can prevent long-term adverse effects (threefold) on health of women. This woman should be observed for these ailments in later life. 

Cu(In,Ga)S2, Thin-Film Solar Cells Prepared by H2S Sulfurization of CuGa-In Precursor

Thin-film CuInS2 solar cell is the leading candidate for space power because of bandgap near the optimum value for AM0 solar radiation outside the earth's atmosphere, excellent radiation hardness, and freedom from intrinsic degradation mechanisms unlike a-Si:H cells. Ultra-lightweight thin-film solar cells deposited on flexible polyimide plastic substrates such as Kapton(trademark), Upilex(trademark), and Apical(trademark) have a potential for achieving specific power of 1000 W/kg, while the state-of-art specific power of the present day solar cells is 66 W/kg. This paper describes the preparation of Cu-rich CuIn(sub 1-x)Ga(sub x)S(sub 2) (CIGS2) thin films and solar cells by a process of sulfurization of CuGa-In precursor similar to that being used for preparation of large-compact-grain CuIn(sub 1-x)Ga(sub x)Se2 thin films and efficient solar cells at FSEC PV Materials Lab

Total Ionizing Dose Effects on CMOS Image Sensor for the ULTRASAT Space Mission

ULTRASAT (ULtraviolet TRansient Astronomy SATellite) is a wide-angle space telescope that will perform deep time-resolved surveys in the near-ultraviolet spectrum. ULTRASAT is a space mission led by the Weizmann Institute of Science and the Israel Space Agency and is planned for launch in 2025. The camera implements backside-illuminated, stitched pixel sensors. The pixel has a dual-conversion-gain 4T architecture, with a pitch of $9.5$ $\mu m$ and is produced in a $180$ $nm$ process by Tower Semiconductor. Before the final sensor was available for testing, test sensors provided by Tower were used to gain first insights into the pixel's radiation tolerance. One of the main contributions to sensor degradation due to radiation for the ULTRASAT mission is Total Ionizing Dose (TID). TID measurements on the test sensors have been performed with a Co-60 gamma source at Helmholz Zentrum Berlin and CC-60 facility at CERN and preliminary results are presented.Comment: Part of the conference: Frontier Detectors for Frontier Physics: 15th Pisa Meeting on Advanced Detectors, La Biodola - Isola d'Elba Published in: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Available online 15 June 2023, 168463. In Press, Journal Pre-proo

The Model 2.0 and Friends: An Interim Report

Last year, I reported on preliminary results of an anatomically-inspired deep learning model of the visual system and its role in explaining the face inversion effect. This year, I will report on new results and some variations on network architectures that we have explored, mainly as a way to generate discussion and get feedback. This is by no means a polished, final presentation! We look forward to the group’s suggestions for these projects

Metastatic appendiceal adenocarcinoma presenting late as epididymo-orchitis: a case report and review of literature

BACKGROUND: Whereas testicular metastases are in themselves a rare entity, testicular secondaries from an appendiceal carcinoma have not yet been described. The case also illustrates the diagnostic dilemma of a tumour presenting as epididymo-orchitis. CASE PRESENTATION: The authors present a case of an appendiceal carcinoma that, two years after radical therapy, manifested as a secondary in the testis. It was misdiagnosed as an epididymo-orchitis and was only revealed through histology. CONCLUSIONS: Practitioners need to remember that long-standing testicular inflammation may result form secondary tumours. Even "exotic" primary tumours in the medical history of the patient must give rise to an increased suspicion threshold