Machine learning tackles quantum error correction

first_img Citation: Machine learning tackles quantum error correction (2017, August 15) retrieved 18 August 2019 from https://phys.org/news/2017-08-machine-tackles-quantum-error.html (Phys.org)—Physicists have applied the ability of machine learning algorithms to learn from experience to one of the biggest challenges currently facing quantum computing: quantum error correction, which is used to design noise-tolerant quantum computing protocols. In a new study, they have demonstrated that a type of neural network called a Boltzmann machine can be trained to model the errors in a quantum computing protocol and then devise and implement the best method for correcting the errors. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Explore further Blind quantum computing for everyone © 2017 Phys.orgcenter_img The physicists, Giacomo Torlai and Roger G. Melko at the University of Waterloo and the Perimeter Institute for Theoretical Physics, have published a paper on the new machine learning algorithm in a recent issue of Physical Review Letters.”The idea behind neural decoding is to circumvent the process of constructing a decoding algorithm for a specific code realization (given some approximations on the noise), and let a neural network learn how to perform the recovery directly from raw data, obtained by simple measurements on the code,” Torlai told Phys.org. “With the recent advances in quantum technologies and a wave of quantum devices becoming available in the near term, neural decoders will be able to accommodate the different architectures, as well as different noise sources.”As the researchers explain, a Boltzmann machine is one of the simplest kinds of stochastic artificial neural networks, and it can be used to analyze a wide variety of data. Neural networks typically extract features and patterns from raw data, which in this case is a data set containing the possible errors that can afflict quantum states. Once the new algorithm, which the physicists call a neural decoder, is trained on this data, it is able to construct an accurate model of the probability distribution of the errors. With this information, the neural decoder can generate the appropriate error chains that can then be used to recover the correct quantum states.The researchers tested the neural decoder on quantum topological codes that are commonly used in quantum computing, and demonstrated that the algorithm is relatively simple to implement. Another advantage of the new algorithm is that it does not depend on the specific geometry, structure, or dimension of the data, which allows it to be generalized to a wide variety of problems. In the future, the physicists plan to explore different ways to improve the algorithm’s performance, such as by stacking multiple Boltzmann machines on top of one another to build a network with a deeper structure. The researchers also plan to apply the neural decoder to more complex, realistic codes.”So far, neural decoders have been tested on simple codes typically used for benchmarks,” Torlai said. “A first direction would be to perform error correction on codes for which an efficient decoder is yet to be found, for instance Low Density Parity Check codes. On the long term I believe neural decoding will play an important role when dealing with larger quantum systems (hundreds of qubits). The ability to compress high-dimensional objects into low-dimensional representations, from which stems the success of machine learning, will allow to faithfully capture the complex distribution relating the errors arising in the system with the measurements outcomes.” More information: Giacomo Torlai and Roger G. Melko. “Neural Decoder for Topological Codes.” Physical Review Letters. DOI: 10.1103/PhysRevLett.119.030501. Also at arXiv:1610.04238 [quant-ph] Journal information: Physical Review Letters The neural decoder architecture. Credit: Torlai et al. ©2017 American Physical Societylast_img read more

Base fare of appbased cabs to come down soon

first_imgKolkata: The base fare of the app cabs like Ola and Uber is going to drop in the state soon. Sources said that the base fare will be finalised keeping parity with the regular air-conditioned taxis. It has been learnt that the base fare could come down to Rs 40. The surge fare will also not be more than 45 percent.The app cab operators have given their letter in this connection to the state Transport department on Thursday. There was a high level meeting in this connection between the Transport department authorities and the operators.An Ola spokesperson said: “…We have been and will continue to abide by the directions of the Transport department and the government. We will continue to strengthen the Ola platform and maintain a fair-price policy for the entire ecosystem.”last_img read more

Bagree Market fire brought under control after two days

first_imgKolkata: The massive fire at Bagree Market in Burrabazar area in the business hub of the city has been brought under control after two days, a senior officer of the fire department said Tuesday. At the moment the process of “cooling down” was on at the Bagree Market and 15 fire tenders have been pressed into service for it, Director General (DG) of West Bengal Fire & Emergency Services Jag Mohan said. “The fire has been brought under control. Our officers kept on fighting the blaze and they fought throughout the night. We are continuing our fight as the cooling process is on,” Jag Mohan said. Also Read – Rain batters Kolkata, cripples normal life There was immense heat inside the building and it made things very difficult for fire fighters to continue, he said. No one was injured in the fire, he added. Another fire department officer said cracks were found on the walls of the building and precautionary measures have been taken to avoid any untoward incident. “Shopkeepers and a few residents of adjacent buildings have been evacuated. A few cracks were seen on the walls of the Bagree Market building. We are not taking any chances,” the officer said. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killed The massive fire broke out at Bagree Market around 2.30 am on Sunday, gutting at least 1,000 business establishments inside the G+5 building and causing huge losses to traders ahead of Durga Puja. The state government has directed the police and the fire department to find out the cause of the fire and initiate strict legal action against those found guilty in this mishap. Police have been directed to summon owners of the building.last_img read more

Kolkata Police bring Amalendu Chatterjee on transit remand

first_imgKolkata: Kolkata Police brought arrested RSS leader Amalendu Chatterjee in Kolkata on transit remand, late on Saturday night. He was arrested in Delhi on the charges of alleged molestation and rape after promising to marry a woman BJP worker of Bengal.Chatterjee was arrested from Deshbandhunagar area under Karol Bagh police station on September 17. Following the arrest, he was produced before the Tis Hazari Court. But due to Chatterjee complaining about chest pain, the court ordered the Kolkata Police team to admit him in a state-run hospital there. Also Read – Rain batters Kolkata, cripples normal lifeAfter Chatterjee felt better, police again submitted a request for transit remand three days ago. After the remand was granted, Chatterjee was brought back to Kolkata by flight on Saturday night. ]He was produced before the Alipore Court on Sunday and remanded to police custody till September 27.Chatterjee is a leader of the state RSS unit and an all India Pracharak of the party. Along with Chatterjee, allegations of lewd comments and attempt to molest and rape have been made against Dilip Ghosh, state BJP president, Shivprakash, the party’s all India leader and Subrata Chatterjee and Bidyut Mukherjee, secretaries of the state unit of BJP. The woman had made a complaint with the Behala women police station on August 31.In the FIR, she alleged that taking advantage of her past acquaintance, Chatterjee made advances and she had to terminate pregnancy thrice. From 2014, Chatterjee started visiting her flat and they attended many meetings organised by BJP and RSS in different parts of Bengal and India. Chatterjee also developed a very good relation with her son.last_img read more

Traditions are losing importance

first_imgHome is where the heart is, that’s what you get to learn from Umesh Chowdhary, the Vice Chairman and Managing Director of Titagarh Wagons Ltd. Humble by nature, Chowdhary believes that nothing is impossible if you put your mind to it. Inspired by his father, J P Chowdhary, this 42-year-old business tycoon has achieved success at a very young age by banking on honesty and hard work during trying times. Besides his association with Titagarh Wagons, he is also the Deputy Chairman of the Confederation of Indian Industry (Eastern Region). On the international front, Chowdhary has been knighted by the French President and is the Honorary Consul of Switzerland.  Also Read – ‘Playing Jojo was emotionally exhausting’Titagarh Wagons is one of the leading private sector wagon manufacturers of India. It is also an industry partner to the Defence Research and Development Organisation(DRDO), Ministry of Defence, for which it manufactures special wagons, shelters and other engineering equipment. The company also makes Metro coaches. Chowdhary is in conversation with Shayani Mukherjee: Q.Have you always been a South Calcutta resident?A.I was born in Jamir lane and grew up in Loudon Street. I have changed a lot of houses before finally settling in Alipore.  Also Read – Leslie doing new comedy special with NetflixQ.Do you have siblings? What was your childhood like?A. Yes, I have two elder sisters and both of them reside in Calcutta. I grew up seeing my dad working and it was like any other normal childhood. Q. Tell us about your fondest childhood memory.A. There are many of them but one of the fondest remains my journey way back from school. I used to tell my mother to not walk back home and insisted on taking a rickshaw. Although the distance from Birla High to my place was not too far, I remember repeatedly telling her to take a rickshaw ride till home. Q.Who are you inspired by?A. I have been inspired by a number of people, especially my father who did everything by himself. I have always drawn strength from people like him, who have worked hard and struggled from the beginning. Persistence, perseverance and sincerity are the three things that inspired me.Q. Which factors do you think are imperative to gaining success?A.As I said, there are three aspects that should drive your life. First is hard work, second is discipline and sincerity of approach and third is discipline. In fact last night, while talking to my son, who is fifteen years old and pursuing his studies in Switzerland, I told him that if these three things are there in you, sooner or later, you are going to achieve what you want to.  Q. Apart from your work, are you interested in other activities like singing or painting or playing an instrument ?A. I’m exceedingly fond of music but if I start singing, people might just run away or might even commit suicide. For me, it is as important as food.Q. What kind of music do you listen to?A. I listen to all types of music except for the modern rock and roll. That is definitely not my genre. Q. Has Calcutta changed?A. Calcutta has changed in a lot of ways. It has improved with time, especially in terms of infrastructure. However, culturally, what Calcutta used to be in the past is not there anymore. Somewhere down the line, traditions are losing importance. Q. What is it about the city that you like the most?A.Actually I don’t know what I don’t like. I love the people, the culture and warmth of the people. It’s home. Although I stay out Calcutta about half a month, I look forward to coming back all the time.Q.Do you plan to settle somewhere else in future?  A. No but if I did, I’ll be thrown out of the house. Calcutta is home, so I would not avail any such option.Q.How do you think this city needs to develop?A.The city has suffered from a huge legacy of perception and I’m a firm believer that sometimes perception becomes greater than reality. Although the perception is now changing, it takes a lot of time to change the mindset. People don’t believe something new very easily and to go to the next level of development, economically or socially, perception needs to change. That being the case, I believe this transformation is taking place now. Working in multiple jurisdictions, I have realized how known Bengal today is better than what it used to be. Q.Last year TWL announced its first contract in the Metro market and it is coming up with a factory in West Bengal. Can you give us some details about this venture?A.Sure, production of Metro and Passenger coaches is something that I have been very keen on for a long time now. While we now have a capacity of producing 10,000 wagons a year, we started with just a capacity of 150 wagons a year. The business has grown in the span of 15-16 years. In 2007, on the order of Railways, we started making local passengers trains and last year, we took the first contract for rehabilitating the Metro coaches. It is currently engaged in the refurbishment of 8-10 Kolkata metro trains which will be completed in due time. Although this contract was not very viable commercially, I wanted to do this for two reasons. First and foremost, I wanted to do something that’s going to leave a mark on Kolkata and second it was like an entry point into the Metro business. We have acquired “Firema,” which is the second largest train manufacturer of Italy, from the Government. They have done a series of Metro trains and together we have participated in the first major Metro project earlier this month. We will be making Metro coaches in our passenger coach factory in Uttarpara as it’s been expanded.Q.Titagarh Wagons has joined hands with French firm ‘Matiere’ to take up manufacturing and sale of metallic and modular bridges. How has it benefited your company? How will it benefit India on a broader level?This is under formation now. We are manufacturer of Bailey bridges and currently we have partnered with Matiere, which is into making of advanced modular bridges. This will enable us to make Bugatti range of bridges while also concentrating on the production of Bailey bridges. It’s definitely going to benefit India as the construction time of bridges would come down rapidly and reliability of the bridges will be much higher. Q.TWL, in a partnership with Hitachi Rail, has bagged an order in Italy to supply double decker trains. How fast is the work going? Are we hoping to see them ready by 2017?A. It is already in progress and we have started delivering in accordance with the earlier contract. From November, we will start delivering under a new contract. We are completing the order by April, 2017 for Italy. Q.Tell us about some of your upcoming projects…A. We are concentrating on things that we are already involved in. We have created huge amount of infrastructure. One of the most important things that we are planning to do in the coming years is to start manufacturing Metro coaches in India once we start getting orders. This is going to be the first of its kinds of a project not only in the Eastern India but in the entire India. Q. How well is the state government working?A. I have been a supporter of the State government and I believe that the three qualities that I have talked about earlier are present in our Chief Minister. I can refer her as the epitome of these qualities. The direction needs to be perfect while the pace of the journey can remain debatable. I have always remained completely non-political and I don’t support one particular party. Yes, obviously there are more things that can be done and hindsight makes everyone wiser. Q.What are some of the problems that are faced by wagons-making industries?A.The problem is that there is no work load. Wagon manufacturing capacity in India is close to about 30,000 wagons a year and the average procurement of wagons in the last five years have been 4,500 wagons.Q.Despite wagon procurement programmes, railways face shortage of wagons daily.Why do you think this is happening?A. It is a great irony and this is something I have not been able to fathom because on one side there is market and on the other, there are no wagon procurements. While, the railways say they have wagons, customers report shortage and we sit here without any workload. Now if I put my optimistic cap on, I think that the railways is first concentrating on developing infrastructure, building more capacity and then they would probably think of utilising those capacity. Ideally, both should go hand in hand.Q. Do you think the government should go for complete or partial privatization of railways?  A.Yes, the government could go for partial privatisation of Railways because it should not be at all into manufacturing.Q. What message do you want to leave for young entrepreneurs?A. Life is full of challenges and one should not give up hope. I started working when I was 15 years old and it’s been 27 years of hard work. Life has its ups and downs but both ups and downs teach you a lot. Some of the best lessons have happened during difficult periods. Hence, every experience has something to teach you, so you must learn from it.last_img read more

Kashmakash Dealing with societal taboos

first_imgSaitan Theater group successfully organized a Hindi drama – Kashmakash at the Akshara Theater recently in the national capital. The two-series play is based on the complications of family relations where a son returns after seven years to soothe his parents, with a wish to unite his family as he was the one responsible for all their sufferings because of his own love – and to make the situation more complex, he was in an incest relationship with his sister. Also Read – ‘Playing Jojo was emotionally exhausting’The play, scripted and directed by Rajneesh Gautam, founder of Saitan Theater group, included Anish Sachdeva, Armeen Kaur Ahuja, Rennet Attri, Shashank Rawat and Saket Rateria in the cast. When asked about the choice of subject, Rajneesh said, “This topic is considered as a taboo not only in India but in other countries too, we avoid talking about it.  Medical Science, Psychology and society structure consider it abnormal. However we understand that emotions and feelings don’t follow structure. Love has no boundaries.” The actors did a tremendous job in portraying the characters effortlessly. The romantic shayaris in the play touched the heart and soul of the audience, while the live music of the play served as its USP which was given by Vikas Sagar and Sagar Gautam. The stage designing was done beautifully by Devika Sharma. Saitan Theater group has produced shows including ‘The Deadly Sins’, ‘Murder at the Empress’ and ‘Qaidi No 666’. All the plays were  appreciated for excellent acting and direction. “Actually, the word SAITAN is derived from Saint and Satan, it wants to present before the world the two extremes that exist in every person. Our mission is to prove that we all have our good side and bad- we are our own God and Devil,” said Namita Verma, the co-founder of Saitan.last_img read more

Exploring new horizons of Indian culture

first_imgMinister of State for Culture (I/C), Dr Mahesh Sharma, released three books – ‘Jewellery’ by Dr Gulab Kothari, ‘Ghats of Banaras’ by Pratapanand Jha and Dr Sachidanand Joshi and ‘Untold Story of Broadcasting’ by Dr Gautam Chatterjee at IGNCA, New Delhi. Speaking on the occasion, he congratulated IGNCA for its efforts in encouraging art and culture. “Jewellery making has been a traditional occupation with a finer classification of those who make it in gold, silver, diamond, pearl, artificial etc. But in recent times it is also being studied as a specialized stream of knowledge. This is the most significant book for our upcoming generation,” he said. Also Read – Add new books to your shelfThe second book titled ‘Untold Story of Broadcasting’ – written by Dr Chatterjee – is about behind-the-scenes developments during the Quit India movement. It gives an authentic account of the secret broadcast which took place during the movement led by Ram Manohar Lohia. It has been published in collaboration with Publication Division, Government of India.The Book ‘Ghats of Banaras’ is derived out of the similar documentation conducted recently at Varanasi. These ghats situated at the bank of river Ganga in a semi-circular shape (ardhachandrakar), give a spectacular view of the city. Also Read – Over 2 hours screen time daily will make your kids impulsiveIGNCA Member Secretary Dr Sachchidanand Joshi said, “Under the guidance of our president Ram Bahadur Rai, we are trying to do something new and path-breaking in the field of art and culture. Since decades, culture has been described in a set format, but we – who are new in this field – are opening a new horizon for the scholars to identify something new out of the culture but related to the culture. Also, we have taken the initiative of promoting art via publishing new books and ‘Jewellery’ is one of the books of this initiative.” “Besides, we are also happy to announce two more books today – ‘Untold story of broadcast during Quit India movement – written by Dr Chatterjee. In this book, he digs out archival material to rewrite the history of Quit India with new light and new information. The other book is by Dr P Jha, titled ‘Ghats of Banaras’ – which talks about the ghats of Varanasi. These Ghats situated at the bank of river Ganga in a semi-circular shape (ardhachandrakar), give a spectacular view of the city,” he further added.last_img read more

Knowing the art of advertising

first_imgThe members of FICCI Ladies Organisation (FLO) – the women business wing of apex business body FICCI organised an interactive session with advertisement guru Prahlad Kakkar and one line punch guru known more Amul butter punchlines. Titled ‘Advertising the art of being creative with strategy’, the session was held in New Delhi on December 7.”Advertising can be a massive tool for social change and in advertising, any idea is as good or as bad as your level of determination to make it work. It is having a passion that matters, howsoever illogical it is, you just have to believe in yourself. When you are passionate about something, two and two becomes 22, when you are logical about something two and two becomes four,” said Ad guru and filmmaker Prahlad Kakkar while speaking at the session. Also Read – Add new books to your shelfSpeaking of women in entrepreneurial roles, Kakkar stated, “Women have a built-in strength to go against the odds and prove men wrong. Women are way tougher than men mentally. They are ferocious in their loyalty and value system. Unlike men and institutions that look for Return On Investment in any venture, women focus on value system – a core element that builds a strong enterprise. The one single defining idea about women is their passion. That’s where they have an edge.” Also Read – Over 2 hours screen time daily will make your kids impulsiveBharat Dabholkar – a well-known theatre and ad personality and the man behind Amul billboards said, “People in India are extremely creative. I don’t know how they do it. But I cannot. Advertisements work if it is a simple idea, if you make it very complicated then people won’t like it. To make an ad viral, you have to keep it simple so that people can put their own inputs to it and make it more interesting.” Talking about his journey in the advertisement, Dabholkar recalled his works. He further talked about how he created many memorable campaigns and got awards for brands advertisements like Ceat, Frooti, Appy, BOI, to name a few. But his most memorable was Amul as it gave him intense creative satisfaction and huge recognition. FLO President, Pinky Reddy, who was also present at the event said, “FLO is the most appropriate platform to connect, learn and grow. We, at FLO, recognise the success stories of true achievers and provide a platform for the members to be inspired by them.” Concluding the session Reddy thanked the guests for their interesting session and said, “Both Prahlad and Bharat are exemplary leaders in their own creative domain. They have been successfully harnessing their innate creative abilities and converting them to strategised outputs. It was fascinating to hear about their journey, to learn about their challenges and understand their creative pursuits. The right perspective and the precise skills for an effective brand positioning was key takeaway from the event.”last_img read more

Kids with ADHD take more time to be schoolready

first_imgResearchers have found that pre-schoolers with symptoms of attention deficit hyperactivity disorder (ADHD) are much less likely to be ready for school, compared to other children of the same age. The study, published in the journal Pediatrics, included 93 children — 45 children with ADHD and 48 without the condition. Aged between 4-5 years, nearly all had attended or were currently enrolled in preschool and some were enrolled in kindergarten. It was found that 79 per cent of the children with ADHD had impaired school readiness compared with 13 per cent of children in the control group. Also Read – Add new books to your shelf”We were pretty surprised at the proportion of kids within the ADHD group who were not school-ready, it’s a really high number,” said Irene Loe, Assistant Professor at Stanford University in the US. “A lot of these kids are not identified until they’re really having a lot of trouble in the school setting,” Loe said. For the study, researchers conducted tests and administered parent questionnaires to measure five areas of the children’s functioning: physical well-being and motor development; social and emotional development; approaches to learning; language development; and cognition and general knowledge. Also Read – Over 2 hours screen time daily will make your kids impulsiveAccording to the study, kids with ADHD were not more likely than their peers to show impairment in the area of cognition and general knowledge. But children with ADHD were much more likely than their peers to struggle in all the four other areas measured. They were 73 times more likely than children without ADHD to be impaired in approaches to learning; more than seven times as likely to have impaired social and emotional development; six times as likely to have impaired language development; and three times as likely to have impaired physical well-being and motor development. The findings suggest that identifying and helping kids with significant levels of ADHD symptoms could reduce their struggles in elementary school.last_img read more

Keventer Crosswinds felicitated with Best ­Residential Project award

first_imgKeventer’s premium residential project – Keventer Crosswinds, has been adjudged the Best Residential Project under ‘Ultra Luxury Segment’ for the year 2019 at the CNBC-AWAAZ Real Estate Awards–East Zone. Senior officials from Keventer received the prestigious award at a gala ceremony held in Kolkata.CNBC-AWAAZ Real Estate Awards identifies the best projects and the winning teams behind them. The East Zone winners, under various categories, have been chosen from more than 5000 projects, and were selected by an esteemed jury panel. Keventer Crosswinds – a 10-storey building located in the heart of Alipore, at Hastings Park Road, is one of its kind residential project in India because of its Louvres based multifunctional façade. Each floor of this building has two luxurious apartments with all modern amenities and facilities including a state of the art Concierge service desk.last_img read more