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We know that all the other forces governed by quantum mechanics are transmitted by indivisible particles: photons for the electromagnetic force, which governs light and the basic chemistry of matter; gluons for the strong force, which sticks together protons and neutrons inside atoms; and W and Z bosons for the weak force, which enables certain particles to radioactively decay. If gravity has the same underlying theory as these forces, it should also be carried by its own particle: a graviton. Now researchers, including Claudia Du Rham at Imperial in London, are in the hunt for these mysterious and vanishingly weak particles.
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About New Scientist:
New Scientist was founded in 1956 for “all those interested in scientific discovery and its social consequences”. Today our website, videos, newsletters, app, podcast and print magazine cover the world’s most important, exciting and entertaining science news as well as asking the big-picture questions about life, the universe, and what it means to be human.

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https://www.newscientist.com/

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Check out my course about quantum mechanics on Brilliant! First 30 days are free and 20% off the annual premium subscription when you use our link ➜ https://brilliant.org/sabine.

Correction to the screen text at 05:04: It’s in the range of microgram. What I say is correct, the text isn’t. Sorry about that.

This video comes with a quiz which you can take here: https://quizwithit.com/start_thequiz/.… are one of the most sought-after particles in physics. They could help physicists combine quantum physics with gravity to create a theory of “quantum gravity.” We thought until recently they were for all practical purposes impossible to detect, but now scientists are coming up with some ideas for how graviton-detecting experiments could work for real. Let’s take a look. 🤓 Check out my new quiz app ➜ http://quizwithit.com/ 💌 Support me on Donorbox ➜ https://donorbox.org/swtg 📝 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/ 👉 Transcript with links to references on Patreon ➜ / sabine 📩 Free weekly science newsletter ➜ https://sabinehossenfelder.com/newsle… 👂 Audio only podcast ➜ https://open.spotify.com/show/0MkNfXl… 🔗 Join this channel to get access to perks ➜ / @sabinehossenfelder 🖼️ On instagram ➜ / sciencewtg #science #sciencenews #physics #gravity.

Gravitons are one of the most sought-after particles in physics. They could help physicists combine quantum physics with gravity to create a theory of \.

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It has always been interesting and exciting to study quantum physics. One of the most amazing things about it was the idea of quantum transportation, which seemed like something from science fiction. But recent progress has turned this idea from an academic thought into a real-world application, marking a fundamental change in how we think about and communicate.

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While some quantum computing companies push to demonstrate near-term commercial value, Rigetti Computing is taking a different approach. The company has identified specific technical milestones it said must be achieved before quantum systems can deliver meaningful business results, including 99.9% fidelity, 20-nanosecond gate speeds and real-time error correction.

In an interview we conducted at The Economist Commercializing Quantum event, Rigetti CEO Subodh Kulkarni outlined how the company’s novel chiplet-based architecture could help scale systems to 10,000 qubits, while also revealing an intriguing potential role for quantum computing in advancing artificial general intelligence.

Enter Quantum: What’s your take on the debate between return on investment versus technical capability in quantum computing?

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The phenomenon of biological ultraweak photon emission (UPE), that is, extremely low-intensity emission (10 − 103 photons/cm2/sec) in the spectral range of 200 − 1,000 nm, has been observed in all living systems that have been examined. Here we report experiments that exemplify the ability of novel imaging systems to detect variations in UPE for a set of physiologically important scenarios. We use EMCCD and CCD cameras to capture single visible-wavelength photons with low noise and quantum efficiencies higher than 90%. Our investigation reveals significant contrast between the UPE from live vs. dead mice. In plants we observed that an increase in temperature and injuries both caused an increase in UPE intensity. Moreover, chemical treatments modified the UPE emission characteristics of plants, particularly the application of an anesthetic (benzocaine) to injury, which showed the highest emission among the compounds tested. As a result, UPE imaging provides the possibility of non-invasive label-free imaging of vitality in animals and the responses of plants to stress.

The authors have declared no competing interest.

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Researchers at the University of Turku in Finland have developed a simple method to explore a complex area of quantum science. The discovery makes research in this field cheaper and more accessible, which could significantly impact the development of future laser, quantum and high-tech display technologies.

A team of researchers developed a new method for fabricating small structures known as optical microcavities. These structures allow scientists to study how light interacts with matter in a very precise process that can lead to the creation of novel quantum states called polaritons. Polaritons are unusual hybrid particles made from light and matter.

The results have been published in the journal Advanced Optical Materials.

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But such measurements are notoriously challenging: the instruments used are themselves governed by , and their interaction with particles can alter the very properties they are meant to observe.

“The field of quantum measurements is still poorly understood because it has received little attention so far. Until now, research has mainly focused on the states of themselves, which feature properties—like entanglement or superposition—that are more directly applicable to areas such as quantum cryptography or ,” explains Alejandro Pozas Kerstjens, Senior Research and Teaching Assistant in the Department of Applied Physics, Physics Section, at the UNIGE Faculty of Science.

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