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Primeur weekly 2018-02-19

Exascale supercomputing

Ready for Exascale: researchers find algorithm for large-scale brain simulations on next-generation supercomputers ...

Quantum computing

Researchers demonstrate promising method for improving quantum information processing ...

Fingerprints of quantum entanglement ...

Focus on Europe

Karel Luyben appointed Dutch National Coordinator for Open Science ...

Middleware

An OLCF-developed visualization tool offers customization and faster rendering ...

Hardware

Dell EMC next generation converged infrastructure makes data centre modernization even simpler ...

Cray reports 2017 full year and fourth quarter financial results ...

Michael Levine and Ralph Roskies Day proclaimed in Pittsburgh and Allegheny County ...

MACH-2 put into operation at 77 trillion operations/second ...

Applications

CENIC recognizes technology projects to combat California wildfires ...

3D-e-Chem team develops building blocks and recipes for computer-aided drug discovery ...

Researchers find blood pressure drug holds promise for preventing onset of Type 1 diabetes ...

NCSA allocates over $2.4 million in new Blue Waters supercomputer awards to Illinois researchers ...

NCSA researchers create one of the most reliable tools for long-term crop prediction in the U.S. Corn Belt ...

Embracing complexity in biological systems ...

Particle interactions calculated on Titan support the search for new physics discoveries ...

GM revs up diesel combustion modeling on Titan supercomputer ...

NEC and Tohoku University succeed in AI-based new material development ...

Physics data processing at NERSC dramatically cuts reconstruction time ...

Advanced computing and water management at the AAAS Meeting 2018 ...

Neural networks everywhere ...

Supermassive black hole model predicts characteristic light signals at cusp of collision ...

New turbulent transport modelling shows multiscale fluctuations in heated plasma ...

TACC and DOD engage in four-year transformational design project ...

The Cloud

Atos signs key contract with the European Space Agency to enable new services with satellite data ...

Oracle buys Zenedge ...

NEC contributes to ecosystem for enhancing virtualized network orchestration ...

Fingerprints of quantum entanglement


Entangled qubits are sent to measurement devices which output a sequence of zeroes and ones. This pattern heavily depends on the type of measurements performed on individual qubits. If we pick the set of measurements in a peculiar way, entanglement will leave unique fingerprints in the measurement patterns. Credit: Juan Palomino.
15 Feb 2018 Vienna - The ultimate goal of quantum information science is to develop a quantum computer, a fully-fledged controllable device which makes use of the quantum states of subatomic particles to store information. As with all quantum technologies, quantum computing is based on a peculiar feature of quantum mechanics, quantum entanglement. The basic units of quantum information, the qubits, need to correlate in this particular way in order for the quantum computer to achieve its full potential.

One of the main challenges is to make sure that a fully functional quantum computer is working as anticipated. In particular, scientists need to show that the large number of qubits are reliably entangled. Conventional methods require a large number of repeated measurements on the qubits for reliable verification. The more often a measurement run is repeated the more certain one can be about the presence of entanglement. Therefore, if one wants to benchmark entanglement in large quantum systems it will require a lot of resources and time, which is practically difficult or simply impossible. The main question arises: can we prove entanglement with only a low number of measurement trials?

Now researchers from the University of Belgrade, the University of Vienna and the Austrian Academy of Sciences have developed a novel verification method which requires significantly fewer resources and, in many cases, even only a single measurement run to prove large-scale entanglement with a high confidence. For Aleksandra Dimic from the University of Belgrade, the best way to understand this phenomenon is to use the following analogy: "Let us consider a machine which simultaneously tosses, say, ten coins. We manufactured the machine such that it should produce correlated coins. We now want to validate whether the machine produces the anticipated result. Imagine a single trial revealing all coins landing on tails. This is a clear signature of correlations, as ten independent coins have 0.01% chance to land on the same side simultaneously. From such an event, we certify the presence of correlations with more than 99.9% confidence. This situation is very similar to quantum correlations captured by entanglement."

Borivoje Dakic stated: "In contrast to classical coins, qubits can be measured in many, many different ways." "The measurement result is still a sequence of zeros and ones, but its structure heavily depends on how we choose to measure individual qubits", he continued. "We realized that, if we pick these measurements in a peculiar way, entanglement will leave unique fingerprints in the measured pattern", he concluded.

The developed method promises a dramatic reduction in time and resources needed for reliable benchmark of future quantum devices.

A. Dimic and B. Dakic are the authors of the paper titled " Single-copy enntaglement detection ". The paper has been published innpj Quantum Information, 2018 - DOI: 10.1038/s41534-017-0055-x.

Source: University of Vienna

Back to Table of contents

Primeur weekly 2018-02-19

Exascale supercomputing

Ready for Exascale: researchers find algorithm for large-scale brain simulations on next-generation supercomputers ...

Quantum computing

Researchers demonstrate promising method for improving quantum information processing ...

Fingerprints of quantum entanglement ...

Focus on Europe

Karel Luyben appointed Dutch National Coordinator for Open Science ...

Middleware

An OLCF-developed visualization tool offers customization and faster rendering ...

Hardware

Dell EMC next generation converged infrastructure makes data centre modernization even simpler ...

Cray reports 2017 full year and fourth quarter financial results ...

Michael Levine and Ralph Roskies Day proclaimed in Pittsburgh and Allegheny County ...

MACH-2 put into operation at 77 trillion operations/second ...

Applications

CENIC recognizes technology projects to combat California wildfires ...

3D-e-Chem team develops building blocks and recipes for computer-aided drug discovery ...

Researchers find blood pressure drug holds promise for preventing onset of Type 1 diabetes ...

NCSA allocates over $2.4 million in new Blue Waters supercomputer awards to Illinois researchers ...

NCSA researchers create one of the most reliable tools for long-term crop prediction in the U.S. Corn Belt ...

Embracing complexity in biological systems ...

Particle interactions calculated on Titan support the search for new physics discoveries ...

GM revs up diesel combustion modeling on Titan supercomputer ...

NEC and Tohoku University succeed in AI-based new material development ...

Physics data processing at NERSC dramatically cuts reconstruction time ...

Advanced computing and water management at the AAAS Meeting 2018 ...

Neural networks everywhere ...

Supermassive black hole model predicts characteristic light signals at cusp of collision ...

New turbulent transport modelling shows multiscale fluctuations in heated plasma ...

TACC and DOD engage in four-year transformational design project ...

The Cloud

Atos signs key contract with the European Space Agency to enable new services with satellite data ...

Oracle buys Zenedge ...

NEC contributes to ecosystem for enhancing virtualized network orchestration ...