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Primeur weekly 2018-04-23

Special

Commissioner Mariya Gabriel sees a growing sense of community in EuroHPC exascale initiative ...

Focus

ETAIS and eInfraCentral: a national and a European approach for offering e-Infrastructure services ...

Exascale supercomputing

The Exascale Computing Project (ECP) appoints GE's Brunon (Dave) Kepczynski as Industry Council Chair ...

Quantum computing

Novel thermal phases of topological quantum matter in the lab ...

Focus on Europe

ISC STEM Student Day opens for sign-up, includes free HPC & Machine Learning tutorial ...

Key role for University of Bristol in new supercomputer collaboration ...

e-IRG Open Workshop to focus on EuroHPC and development of e-Infrastructures in South-Eastern European (SEE) and Eastern-Mediterranean (EM) region ...

The JUWELS supercomputer in Juelich ...

KTH Sweden to organize PDC Summer School - Introduction to High Performance Computing ...

Hardware

Memorandum of Understanding on future international collaboration projects ...

New direct link from South Africa enables global science ...

Integrating optical components into existing chip designs ...

Russian RSC Group deployed the world first 100% hot water liquid cooled supercomputer at Joint Institute for Nuclear Research ...

DDN Storage builds major new engineering facility in Colorado focused on solving AI, Cloud and large-scale enterprise data challenges ...

Cray debuts AMD EPYC processors in supercomputer product line ...

Fujitsu upgrades RIKEN's AI research computer RAIDEN; reaches top tier of processing performance in Japan ...

Fujitsu launches new GS21 mainframe models supporting next-generation mission-critical systems ...

Applications

EMBO Practical Course on Integrative modelling of biomolecular interactions at Barcelona Supercomputing Center ...

Your digital twin: closer than you think - How computer models can predict health and help to prevent and cure diseases ...

From insulator to conductor in a flash ...

Oregon scientists decipher the magma bodies under Yellowstone ...

Some superconductors can also carry currents of 'spin' ...

Improving citizen science and big data analysis ...

Diamond-like carbon is formed differently to what was believed - machine learning enables development of new model ...

AI projected to replace thousands of banking jobs ...

The Cloud

UTSA Open Cloud Institute supports Cloud research & launches certificate programme ...

Novel thermal phases of topological quantum matter in the lab

Quantum circuit implemented on the IBM Quantum Experience platform in order to measure the topological Uhlmann phase. Credit: Oscar Oviyuela et alia.17 Apr 2018 Madrid - For the first time in the lab, a group of researchers from Universidad Complutense de Madrid, IBM, ETH Zurich, MIT and Harvard University have observed topological phases of matter of quantum states under the action of temperature or certain types of experimental imperfections. The experiment has been carried out in a platform of superconducting qubits at IBM, also known as quantum simulator.

Quantum simulators were first conjectured by the Nobel Prize in Physics, Richard Feynman, in 1982 since ordinary classical computers that we use nowadays were proved to be inefficient to simulate systems of interacting quantum particles.

These new simulators are genuinely quantum and can be controlled very precisely - for instance, systems of cold atoms trapped with lasers, or superconducting materials coupled to microwave radiation. They replicate other quantum systems that are harder to manipulate and whose physical properties remain very much unknown.

In an article published in the journalQuantum Informationof the Nature Publishing Group, these researchers explain how using a quantum simulator with superconducting qubits at IBM, they were able to replicate materials known as topological insulators at finite temperature, and measure for the first time their topological quantum phases.

Topological phase of matter represent a very exciting and active field of research that is revolutionising our understanding of nature and material science. The study of these novel phases of matter has given rise to new materials such as topological insulators, which behave as regular insulators in the bulk and as metals at the boundaries. These boundary electronic currents have the spin (intrinsic magnetic moment) polarised, thus they are expected to play a very important role in spintronics, a novel alternative to conventional electronic technology.

Since the discovery of topological matter, researchers have looked for innovative ways to maintain their properties at finite temperature. Previous theoretical works of the researchers at Universidad Complutense proposed a new topologial quantum phase, known as Uhmann phase, to characterise these phases of matter in thermal systems. The Uhlmann phase allows to generalise the topological phases of matter to systems with temperature.

The results found in this experiment with quantum simulators represent the first measurement of topological quantum phases with temperature, and advance the synthesis and control of topological matter using quantum technologies. Among other applications, the topological quantum matter could be used as hardware for future quantum computers due to its intrinsic robustness against errors. The experimental results presented in this work show how these topological quantum phases can also be robust against temperature effects.

The paper titled " Observation of topological Uhlmann phases with superconducting qubits " is authored by O. Viyuela, A. Rivas, S. Gasparinetti, A. Wallraff, S. Filipp, and M.A. Martin-Delgado. It has been published inNPJ Quantum Information, Volume 4, Article number: 10 (2018).

Source: QUITEMAD+

Back to Table of contents

Primeur weekly 2018-04-23

Special

Commissioner Mariya Gabriel sees a growing sense of community in EuroHPC exascale initiative ...

Focus

ETAIS and eInfraCentral: a national and a European approach for offering e-Infrastructure services ...

Exascale supercomputing

The Exascale Computing Project (ECP) appoints GE's Brunon (Dave) Kepczynski as Industry Council Chair ...

Quantum computing

Novel thermal phases of topological quantum matter in the lab ...

Focus on Europe

ISC STEM Student Day opens for sign-up, includes free HPC & Machine Learning tutorial ...

Key role for University of Bristol in new supercomputer collaboration ...

e-IRG Open Workshop to focus on EuroHPC and development of e-Infrastructures in South-Eastern European (SEE) and Eastern-Mediterranean (EM) region ...

The JUWELS supercomputer in Juelich ...

KTH Sweden to organize PDC Summer School - Introduction to High Performance Computing ...

Hardware

Memorandum of Understanding on future international collaboration projects ...

New direct link from South Africa enables global science ...

Integrating optical components into existing chip designs ...

Russian RSC Group deployed the world first 100% hot water liquid cooled supercomputer at Joint Institute for Nuclear Research ...

DDN Storage builds major new engineering facility in Colorado focused on solving AI, Cloud and large-scale enterprise data challenges ...

Cray debuts AMD EPYC processors in supercomputer product line ...

Fujitsu upgrades RIKEN's AI research computer RAIDEN; reaches top tier of processing performance in Japan ...

Fujitsu launches new GS21 mainframe models supporting next-generation mission-critical systems ...

Applications

EMBO Practical Course on Integrative modelling of biomolecular interactions at Barcelona Supercomputing Center ...

Your digital twin: closer than you think - How computer models can predict health and help to prevent and cure diseases ...

From insulator to conductor in a flash ...

Oregon scientists decipher the magma bodies under Yellowstone ...

Some superconductors can also carry currents of 'spin' ...

Improving citizen science and big data analysis ...

Diamond-like carbon is formed differently to what was believed - machine learning enables development of new model ...

AI projected to replace thousands of banking jobs ...

The Cloud

UTSA Open Cloud Institute supports Cloud research & launches certificate programme ...