STATE REP RACE Judy OConnell To Hold Campaign Kickoff Rally On June 28

first_imgWILMINGTON, MA — The Committee for Judy O’Connell for State Representative is holding a Campaign “Kickoff” Rally on Thursday, June 28, 2018, from 7:30pm to 11pm, at the Tewksbury/Wilmington Elks (777 South Street, Tewksbury).The event will include music, light refreshments, and cash bar. Donations appreciated. For more information, visit http://www.JudyForStateRep.com.Like Wilmington Apple on Facebook. Follow Wilmington Apple on Twitter. Follow Wilmington Apple on Instagram. Subscribe to Wilmington Apple’s daily email newsletter HERE. Got a comment, question, photo, press release, or news tip? Email wilmingtonapple@gmail.com.Share this:TwitterFacebookLike this:Like Loading… RelatedBREAKING NEWS: 19th Middlesex State Rep Election Results Are In — Dave Robertson WinsIn “Government”STATE REP RACE: Judy O’Connell Addresses Allegations Of Federal Tax Liens On Her HomeIn “Government”CAMPAIGN FINANCE: Judy O’Connell Raises $10,000; Spends $4,000 Thus FarIn “Government”last_img read more



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Autonomous quantum error correction method greatly increases qubit coherence times

first_img In order to flip the qubits back to their correct states, physicists have been developing an assortment of quantum error correction techniques. Most of them work by repeatedly making measurements on the system to detect errors and then correct the errors before they can proliferate. These approaches typically have a very large overhead, where a large portion of the computing power goes to correcting errors.In a new paper published in Physical Review Letters, Eliot Kapit, an assistant professor of physics at Tulane University in New Orleans, has proposed a different approach to quantum error correction. His method takes advantage of a recently discovered unexpected benefit of quantum noise: when carefully tuned, quantum noise can actually protect qubits against unwanted noise. Rather than actively measuring the system, the new method passively and autonomously suppresses and corrects errors, using relatively simple devices and relatively little computing power.”The most interesting thing about my work is that it shows just how simple and small a fully error corrected quantum circuit can be, which is why I call the device the ‘Very Small Logical Qubit,'” Kapit told Phys.org. “Also, the error correction is fully passive—unwanted error states are quickly repaired by engineered dissipation, without the need for an external computer to watch the circuit and make decisions. While this paper is a theoretical blueprint, it can be built with current technology and doesn’t require any new insights to make it a reality.”The new passive error correction circuit consists of just two primary qubits, in contrast to the 10 or more qubits required in most active approaches. The two qubits are coupled to each other, and each one is also coupled to a “lossy” object, such as a resonator, that experiences photon loss. “In the absence of any errors, there are a pair of oscillating photon configurations that are the ‘good’ logical states of the device, and they oscillate at a fixed frequency based on the circuit parameters,” Kapit explained. “However, like all qubits, the qubits in the circuit are not perfect and will slowly leak photons into the environment. When a photon randomly escapes from the circuit, the oscillation is broken, at which point a second, passive error correction circuit kicks in and quickly inserts two photons, one which restores the lost photon and reconstructs the oscillating logical state, and the other is dumped to a lossy circuit element and quickly leaks back out of the system. The combination of careful tuning of the resonant frequencies of the circuit and adding photons two at a time to correct losses ensures that the passive error correction circuit can operate continuously but won’t do anything to the two good qubits unless their oscillation has been broken by a photon loss.” Journal information: Physical Review Letters © 2016 Phys.org One possible implementation of the logical qubit. The qubits are in the blue boxes and the resonators are in the red boxes. Credit: Kapit. ©2016 American Physical Society Explore further The new method can correct photon loss errors at rates up to 10 times faster than those achieved by active, measurement-based methods. In addition, the passive method can partially suppress noise, so that there are fewer errors in the first place. In its current version, the method can correct only one error at a time, so if a second photon loss occurs before the correction is complete, the method cannot fix the resulting error.All of this error correction leads to a significant increase in the qubit coherence time. The new method can improve this time by a factor of 40 or more compared to without any error correction, and this improvement is greatly needed in order to construct quantum computers. As Kapit explains, qubit coherence times are currently so short that millions of qubits would be required to build a useful quantum computer. Increasing the coherence times can reduce this number to something more feasible.In the future, Kapit plans to integrate the new passive method with active, measurement-based methods to create a hybrid quantum error correction strategy, and investigate how the two methods might work together.He is also currently working with an experimental team to try to build, test, and optimize the device in the next few years. More information: Eliot Kapit. “Hardware-Efficient and Fully Autonomous Quantum Error Correction in Superconducting Circuits.” Physical Review Letters. DOI: 10.1103/PhysRevLett.116.150501 (Phys.org)—It might be said that the most difficult part of building a quantum computer is not figuring out how to make it compute, but rather finding a way to deal with all of the errors that it inevitably makes. Errors arise because of the constant interaction between the qubits and their environment, which can result in photon loss, which in turn causes the qubits to randomly flip to an incorrect state. Scientists track quantum errors in real time Citation: Autonomous quantum error correction method greatly increases qubit coherence times (2016, April 29) retrieved 18 August 2019 from https://phys.org/news/2016-04-autonomous-quantum-error-method-greatly.html 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.last_img read more



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The global IP video network management market is f

first_imgThe global IP video network management market is forecast to reach US$442.4 million (€320.7 million) in 2017, up from US$217.8 million in 2012, according to new research by business consulting firm Frost & Sullivan.The Global IP Video Network Management Market report says that by 2016, more than 70% of data traffic on mobile devices will be video, and claims that video consumption across non-traditional devices such as tablets, smartphones, PCs and connected PCs is a global phenomenon not restricted to a geographic area.“With cable TV service providers offering more applications and interactive content, the rising adoption of IP by broadcasters and video service providers, and the growing consolidation among operators, the global IP video network management market benefited greatly,” according to the study, which covers Europe, North, Central and South America, the Middle East, Africa, and Asia-Pacific.“As broadcasters all over the world upgrade to digital and high-definition workflows, the deployment of IP networking across the value chain is a certainty. This translates to higher adoption of video network management equipment, such as probes and video analysers, as well as data-mining systems – all of which are critical for analysing quality of service and equipment,” said Frost & Sullivan digital media research director Vidya S. Nath.last_img read more



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