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Primeur weekly 2018-08-20

Focus

NVIDIA's Tensor Core GPU offers best of both worlds for HPC and AI with multiple precision ...

Quantum computing

Another step forward on universal quantum computer ...

Quantum material is promising 'ion conductor' for research and new technologies ...

Focus on Europe

Professor Arndt Bode receives highest award for public service in Germany ...

Baycrest co-created Virtual Brain joins flagship neuroscience initiative in Europe ...

Middleware

ShareBackup could keep data in the fast lane ...

Hardware

Asetek to issue Q2 2018 with a record quarterly revenue ...

HPE triples performance and enhances energy efficiency in new supercomputer for National Renewable Energy Laboratory (NREL) ...

NVIDIA reinvents computer graphics with Turing architecture ...

NVIDIA unveils Quadro RTX, world's first ray-tracing GPU ...

CoolIT Systems announces STULZ ANZ as master distributor for liquid cooling products in Australasian region ...

Tachyum touts benefits of universal processor for hyperscale data centres, HPC and AI markets at Hot Chips 2018 ...

"Mission: Green Computing" by Supermicro introduces total cost to the environment (TCE) for leading data centres ...

Rochester Institute of Technology awarded NSF grant to advance high-tech computer architectures ...

Applications

OmniTier's CompStor brings de novo analytics to genomics ...

Deep Learning stretches up to scientific supercomputers ...

More efficient security for Cloud-based machine learning ...

Trailblazer in computational complexity theory to receive Knuth Prize ...

Fellowships recognize tomorrow's supercomputing innovators ...

Magnetic antiparticles offer new horizons for information technologies ...

Low bandwidth? Use more colors at once ...

The Cloud

Tracking down the Big Bang: CERN and Oracle extend research and development partnership ...

Premier Indian Government think tank partners with Perlin Network to advance its national distributed computing infrastructure ...

Another step forward on universal quantum computer

This is a nitrogen-vacancy (NV) centre in diamond with two crossed wires for holonomic quantum gates over the geometric spin qubit with a polarized microwave. Credit: Yokohama National University. 13 Aug 2018 Yokohama - Researchers have demonstrated holonomic quantum gates under zero-magnetic field at room temperature, which will enable the realization of fast and fault-tolerant universal quantum computers. A quantum computer is a powerful machine with the potential to solve complex problems much faster than today's conventional computer can. Researchers are currently working on the next step in quantum computing: building a universal quantum computer.

The paper, published in the journalNature Communications, reports experimental demonstration of non-adiabatic and non-abelian holonomic quantum gates over a geometric spin qubit on an electron or nitrogen nucleus, which paves the way to realizing a universal quantum computer.

The geometric phase is currently a key issue in quantum physics. A holonomic quantum gate manipulating purely the geometric phase in the degenerate ground state system is believed to be an ideal way to build a fault-tolerant universal quantum computer. The geometric phase gate or holonomic quantum gate has been experimentally demonstrated in several quantum systems including nitrogen-vacancy (NV) centres in diamond. However, previous experiments required microwaves or light waves to manipulate the non-degenerate subspace, leading to the degradation of gate fidelity due to unwanted interference of the dynamic phase.

"To avoid unwanted interference, we used a degenerate subspace of the triplet spin qutrit to form an ideal logical qubit, which we call a geometric spin qubit, in an NV centre. This method facilitated fast and precise geometric gates at a temperature below 10 K, and the gate fidelity was limited by radiative relaxation", stated the corresponding author Hideo Kosaka, Professor, Yokohama National University. "Based on this method, in combination with polarized microwaves, we succeeded in manipulation of the geometric phase in an NV centre in diamond under a zero-magnetic field at room temperature."

The group also demonstrated a two-qubit holonomic gate to show universality by manipulating the electron-nucleus entanglement. The scheme renders a purely holonomic gate without requiring an energy gap, which would have induced dynamic phase interference to degrade the gate fidelity, and thus enables precise and fast control over long-lived quantum memories, for realizing quantum repeaters interfacing between universal quantum computers and secure communication networks.

The paper titled " Universal holonomic quantum gates over geometric spin qubits with polarised microwaves " is available online from 13 August 2018. It has been published inNature Communications, with doi: 10.1038/s41467-018-05664-w.

Source: Yokohama National University

Back to Table of contents

Primeur weekly 2018-08-20

Focus

NVIDIA's Tensor Core GPU offers best of both worlds for HPC and AI with multiple precision ...

Quantum computing

Another step forward on universal quantum computer ...

Quantum material is promising 'ion conductor' for research and new technologies ...

Focus on Europe

Professor Arndt Bode receives highest award for public service in Germany ...

Baycrest co-created Virtual Brain joins flagship neuroscience initiative in Europe ...

Middleware

ShareBackup could keep data in the fast lane ...

Hardware

Asetek to issue Q2 2018 with a record quarterly revenue ...

HPE triples performance and enhances energy efficiency in new supercomputer for National Renewable Energy Laboratory (NREL) ...

NVIDIA reinvents computer graphics with Turing architecture ...

NVIDIA unveils Quadro RTX, world's first ray-tracing GPU ...

CoolIT Systems announces STULZ ANZ as master distributor for liquid cooling products in Australasian region ...

Tachyum touts benefits of universal processor for hyperscale data centres, HPC and AI markets at Hot Chips 2018 ...

"Mission: Green Computing" by Supermicro introduces total cost to the environment (TCE) for leading data centres ...

Rochester Institute of Technology awarded NSF grant to advance high-tech computer architectures ...

Applications

OmniTier's CompStor brings de novo analytics to genomics ...

Deep Learning stretches up to scientific supercomputers ...

More efficient security for Cloud-based machine learning ...

Trailblazer in computational complexity theory to receive Knuth Prize ...

Fellowships recognize tomorrow's supercomputing innovators ...

Magnetic antiparticles offer new horizons for information technologies ...

Low bandwidth? Use more colors at once ...

The Cloud

Tracking down the Big Bang: CERN and Oracle extend research and development partnership ...

Premier Indian Government think tank partners with Perlin Network to advance its national distributed computing infrastructure ...