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Category: quantum physics – Page 172

Raman quantum memory demonstrates near-unity performance

Over the past decades, quantum physicists and engineers have developed numerous technologies that harness the principles of quantum mechanics to push the boundaries of classical information science. Among these advances, quantum memories stand out as promising devices for storing and retrieving quantum information encoded in light or other physical carriers.

To be viable for real-world applications, quantum memory must deliver both and . In other words, they should be able to store and retrieve most of the input —typically over 90%—and ensure that a recovered state closely matches the original one.

Notably, most previously proposed strategies to develop efficient were found to produce undesired random fluctuations (i.e., noise). These fluctuations could in turn degrade quantum information, reducing the system’s fidelity.

HD⁺ ions cooled to 18 mK yield most precise vibrational-rotational spectra to date

A research team from the Innovation Academy for Precision Measurement Science and Technology (APM) of the Chinese Academy of Sciences has made significant progress in precisely measuring the vibrational-rotational spectra of hydrogen molecular ions (HD⁺).

The researchers prepared a Be⁺-HD⁺ two-component ion Coulomb crystal at millikelvin temperatures in a linear ion trap. They developed an innovative quantum state preparation and spatially resolved fluorescence detection techniques and used these to measure the high-resolution vibrational-rotational transition spectra of HD⁺ molecular ions. Their findings were published in Physical Review A.

HD⁺ is the simplest heteronuclear molecular ion, composed of one proton, one deuteron, and one electron. Its vibrational-rotational transition energies can be precisely calculated, making it an ideal system for testing quantum electrodynamics (QED) theory and determining , such as the proton-electron mass ratio.

Superconducting qubit that lasts for over 1 millisecond is primed for industrial scaling

In a major step toward practical quantum computers, Princeton engineers have built a superconducting qubit that lasts three times longer than today’s best versions.

“The real challenge, the thing that stops us from having useful quantum computers today, is that you build a qubit and the information just doesn’t last very long,” said Andrew Houck, Princeton’s dean of engineering and co-principal investigator. “This is the next big jump forward.”

In an article in the journal Nature, the Princeton team report that their new qubit lasts for over 1 millisecond. This is three times longer than the best ever reported in a lab setting, and nearly 15 times longer than the industry standard for large-scale processors.

Nobel Winners Just Proved the Universe Is Quantum — 2025 Physics Prize Explained

#EverythingSpace #Universe.

Nobel Winners Just Proved the Universe Is Quantum — 2025 Physics Prize Explained.

In this episode of Everything Space, we break down the groundbreaking discoveries that earned this year’s Nobel Prize, and what they mean for the way we understand reality itself. From experiments that challenge Einstein’s idea of locality, to the mysterious phenomenon of quantum entanglement, these results show that the universe behaves in ways once thought impossible.

We’ll explore how scientists finally confirmed that particles can influence each other across vast distances — instantaneously — and why this discovery reshapes our understanding of space, time, and the very nature of existence.

Join us as we unravel the science behind the Nobel-winning breakthrough that proves the universe isn’t just strange — it’s quantum.

#QuantumUniverse #Physics2025 #NobelPrize #EverythingSpace #SpaceMysteries.

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First Ever Programmable DNA Circuit Is a Breakthrough In Biocomputing

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Hello and welcome! My name is Anton and in this video, we will talk about an invention of a DNA bio computer.
Links:
https://www.nature.com/articles/s41586-023-06484-9
https://www.washington.edu/news/2016/04/07/uw-team-stores-di…perfectly/
Other videos:
https://youtu.be/x3jiY8rZAZs.
https://youtu.be/JGWbVENukKc.

#dna #biocomputer #genetics.

0:00 Quantum computer hype.
0:50 Biocomputers?
1:55 Original DNA computers from decades ago.
3:10 Problems with this idea.
3:50 New advances.
5:35 First breakthrough — DNA circuit.
7:30 Huge potential…maybe.

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Physicists unveil system to solve long-standing barrier to new generation of supercomputers

The dream of creating game-changing quantum computers—supermachines that encode information in single atoms rather than conventional bits—has been hampered by the formidable challenge known as quantum error correction.

In a paper published Monday in Nature, Harvard researchers demonstrated a new system capable of detecting and removing errors below a key performance threshold, potentially providing a workable solution to the problem.

“For the first time, we combined all essential elements for a scalable, error-corrected quantum computation in an integrated architecture,” said Mikhail Lukin, co-director of the Quantum Science and Engineering Initiative, Joshua and Beth Friedman University Professor, and senior author of the new paper. “These experiments—by several measures the most advanced that have been done on any quantum platform to date—create the scientific foundation for practical large-scale quantum computation.”

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