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Primeur weekly 2019-03-04

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Belgium to contribute 5 million euro to Finnish led pre-exascale EuroHPC consortium ...

Crowd computing

Crowd computing network delves into protein structure and seeks new disease therapies ...

Quantum computing

Bosch and QuSoft start quantum computing collaboration ...

Faster method to read quantum memory ...

'Immunizing' quantum bits so that they can grow up ...

D-Wave previews next-generation quantum computing platform ...

Intel drives development of quantum cryoprober with Bluefors and Afore to accelerate quantum computing ...

Researchers move closer to practical photonic quantum computing ...

Focus on Europe

ISC 2019 keynotes will reflect challenges and opportunities ahead ...

Middleware

Western Digital uses Univa HPC Cloud solutions on Amazon Web Services to build million core cluster, improving business competitive advantage ...

Univa offers new support services to Open Source Grid Engine users ...

Hardware

Analytics market leaders DDN Storage and SQream partnering to deliver accelerated business decisions ...

Panasas announces new growth investment and additions to its Board of Directors ...

Fujitsu launches industry's first 600G hyperscale optical transport solution, empowering tomorrow's high-speed networks ...

VAST Data unveils its universal storage architecture to bring an end to the enterprise HDD and storage tiering era ...

Global High Performance Computing (HPC) Market 2019-2024 by Component, Infrastructure, Services, Price Band, HPC Applications, and Deployment Type ...

Applications

Stampede2 and Maverick systems at TACC help power visualization of Arctic Ocean data ...

University at Buffalo names Abani Patra to lead Center for Computational Research ...

Supercomputing enables sound prediction model for controlling noise ...

The Cloud

Mellanox propels JD Cloud to new levels of performance and efficiency ...

National Science Foundation funds second round for OSC's Open OnDemand ...

Researchers move closer to practical photonic quantum computing


This illustration represents a new approach for mapping and measuring photonic correlation with direct single-photon imaging called correlation on spatially-mapped photon-level image (COSPLI). This innovative and powerful tool could help boost quantum information processing. Credit: Xian-Min Jin, Shanghai Jiao Tong University.
28 Feb 2019 Washington - For the first time, researchers have demonstrated a way to map and measure large-scale photonic quantum correlation with single-photon sensitivity. The ability to measure thousands of instances of quantum correlation is critical for making photon-based quantum computing practical.

InOptica, The Optical Society's journal for high impact research, a multi-institutional group of researchers reports the new measurement technique, which is called correlation on spatially-mapped photon-level image (COSPLI). They also developed a way to detect signals from single photons and their correlations in tens of millions of images.

"COSPLI has the potential to become a versatile solution for performing quantum particle measurements in large-scale photonic quantum computers", stated the research team leader Xian-Min Jin, from Shanghai Jiao Tong University, China. "This unique approach would also be useful for quantum simulation, quantum communication, quantum sensing and single-photon biomedical imaging."

Quantum computing technology promises to be significantly faster than traditional computing, which reads and writes data encoded as bits that are either a zero or one. Instead of bits, quantum computing uses qubits that can be in two states at the same time and will interact, or correlate, with each other. These qubits, which can be an electron or photon, allow many processes to be performed simultaneously.

One important challenge in the development of quantum computers is finding a way to measure and manipulate the thousands of qubits needed to process extremely large data sets. For photon-based methods, the number of qubits can be increased without using more photons by increasing the number of modes encoded in photonic degrees of freedom - such as polarization, frequency, time and location - measured for each photon. This allows each photon to exhibit more than two modes, or states, simultaneously. The researchers previously used this approach to fabricate the world's largest photonic quantum chips, which could possess a state space equivalent to thousands of qubits.

However, incorporating the new photonic quantum chips into a quantum computer requires measuring all the modes and their photonic correlations at a single-photon level. Until now, the only way to accomplish this would be to use one single-photon detector for each mode exhibited by each photon. This would require thousands of single-photon detectors and cost around 12 million dollars for a single computer.

"It is economically unfeasible and technically challenging to address thousands of modes simultaneously with single-photon detectors", stated Xian-Min Jin. "This problem represents a decisive bottleneck to realizing a large-scale photonic quantum computer."

Although commercially available CCD cameras are sensitive to single photons and much cheaper than single-photon detectors, the signals from individual photons are often obscured by large amounts of noise. After two years of work, the researchers developed methods for suppressing the noise so that single photons could be detected with each pixel of a CCD camera.

The other challenge was to determine a single photon’s polarization, frequency, time and location, each of which requires a different measurement technique. With COSPLI, the photonic correlations from other modes are all mapped onto the spatial mode, which allows correlations of all the modes to be measured with the CCD camera.

To demonstrate COSPLI, the researchers used their approach to measure the joint spectra of correlated photons in ten million image frames. The reconstructed spectra agreed well with theoretical calculations, thus demonstrating the reliability of the measurement and mapping method as well as the single-photon detection. The researchers are now working to improve the imaging speed of the system from tens to millions of frames per second.

"We know it is very hard to build a practical quantum computer, and it isn't clear yet which implementation will be the best", stated Xian-Min Jin. "This work adds confidence that a quantum computer based on photons may be a practical route forward."

K. Sun, J. Gao, M.-M. Cao, Z.-Q. Jiao, Y. Liu, Z.-M. Li, E. Poem, A. Eckstein, R.-J. Ren, X.-L. Pang, H. Tang, I. A. Walmsley, and X.-M. Jin are the authors of the paper titled " Mapping and Measuring Large-scale Photonic Correlation with Single-photon Imaging ", published inOptica, 6, 3, 244-249 (2019).

Source: The Optical Society

Back to Table of contents

Primeur weekly 2019-03-04

Focus

Belgium to contribute 5 million euro to Finnish led pre-exascale EuroHPC consortium ...

Crowd computing

Crowd computing network delves into protein structure and seeks new disease therapies ...

Quantum computing

Bosch and QuSoft start quantum computing collaboration ...

Faster method to read quantum memory ...

'Immunizing' quantum bits so that they can grow up ...

D-Wave previews next-generation quantum computing platform ...

Intel drives development of quantum cryoprober with Bluefors and Afore to accelerate quantum computing ...

Researchers move closer to practical photonic quantum computing ...

Focus on Europe

ISC 2019 keynotes will reflect challenges and opportunities ahead ...

Middleware

Western Digital uses Univa HPC Cloud solutions on Amazon Web Services to build million core cluster, improving business competitive advantage ...

Univa offers new support services to Open Source Grid Engine users ...

Hardware

Analytics market leaders DDN Storage and SQream partnering to deliver accelerated business decisions ...

Panasas announces new growth investment and additions to its Board of Directors ...

Fujitsu launches industry's first 600G hyperscale optical transport solution, empowering tomorrow's high-speed networks ...

VAST Data unveils its universal storage architecture to bring an end to the enterprise HDD and storage tiering era ...

Global High Performance Computing (HPC) Market 2019-2024 by Component, Infrastructure, Services, Price Band, HPC Applications, and Deployment Type ...

Applications

Stampede2 and Maverick systems at TACC help power visualization of Arctic Ocean data ...

University at Buffalo names Abani Patra to lead Center for Computational Research ...

Supercomputing enables sound prediction model for controlling noise ...

The Cloud

Mellanox propels JD Cloud to new levels of performance and efficiency ...

National Science Foundation funds second round for OSC's Open OnDemand ...