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Special Topics

EPJ QT Highlight - Teaching quantum entanglement with card games

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Understanding violation to Bell’s Inequality with a card game

Simple interactive activities help non-expert audiences to grasp the core concepts of quantum entanglement and the Nobel Prize-winning experiments that proved how quantum mechanics defies classical physics

Even compared with other fields of cutting-edge research, the underlying principles of quantum mechanics are often deeply complex, and can contradict our everyday intuitions about reality. When communicating these ideas beyond the scientific community, this makes it incredibly challenging for researchers to simplify concepts enough to make them approachable, without sacrificing accuracy.

Through new research published in EPJ Quantum Technology, Valentina De Renzi at the University of Modena and Reggio Emilia, Matteo Paris at the University of Milan, and Maria Bondani at Italy’s Institute for Photonics and Nanotechnologies present a new approach for introducing the concepts of quantum entanglement, and its experimental proof through the violation of Bell's Inequality – whose experimental demonstration earned the 2022 Nobel Prize in Physics.

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EPJ QT Highlight - Exploring the full-stack design space of quantum computing

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Illustration of fidelity vs. connectivity across benchmarks as facets comparing three crosstalk models, thermal relaxation, and depolarisation noise for the heavy-hex back-end topology.

In-depth analysis shows that co-designing hardware and software is essential for optimising quantum performance.

Over the past few years, advances in quantum computing have pushed it steadily closer to practical, real-world applications. But before this goal can be reached, greater standardisation will be needed across the entire quantum ‘stack’ – from user-facing software, all the way down to the underlying hardware.

In new research published in EPJ Quantum Technology, a team led by Hila Safi at the Technical University of Applied Sciences Regensburg investigates how this full-stack design challenge might be addressed. By systematically exploring the interplay between software hardware, the researchers show that improving quantum performance will depend on carefully co-designing both layers together.

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EPJ QT Highlight - Progress in terrestrial very long baseline atom interferometry

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Atom interferometers (here labelled AION, AEDGE and AEDGE+) fill a crucial frequency gap in gravitational wave detection, in the deci-Herz range.

The second of a series of workshops, held in London in April 2024, saw over 250 experts make progress towards a blueprint for a kilometre-long atom interferometer.

Interferometry is a technique that extracts information from the interference patterns of superimposed waves, most typically electromagnetic waves. However, atom interferometry, as its name implies, instead uses atoms that are treated as waves through wave-particle duality. Atom interferometers can make exceptionally precise measurements, for example to test foundational physical principles or detect gravitational waves. This decade, international experts in terrestrial very long baseline atom interferometry (TVLBAI) have met for two workshops; progress reported at the second of these, held in London in April 2024, has recently been published in EPJ Quantum Technology.

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Managing Editors
Sandrine Karpe and Vijala Kiruvanayagam (EDP Sciences) and Sabine Lehr (Springer-Verlag)
ISSN: 1951-6355 (Print Edition)
ISSN: 1951-6401 (Electronic Edition)

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