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Physics

1 month agoarXivPhysics

The Map Beats the Magnitude: Quantum Physics Has Been Reading the Wrong Label

Scientists assumed the strength of quantum interactions was what shaped the physics. Turns out the wiring diagram matters just as much, and sometimes more.
1 month agoopenalexPhysics

The Receiver Was Always the Hard Part of Twisted Light

Twisted-light multiplexing has been a credible route to more optical bandwidth for years. The missing piece was a way to read the beam back out without a roomful of optics.
1 month agoarXivPhysics

Stop Fixing Quantum Errors. Ask the Right Question Instead.

A hybrid trick cuts the cost of taming quantum noise from millions of attempts to a handful — not by cleaning up the mess, but by building its cure into the question.
1 month agoopenalexPhysics

The Microscope That Sees What Light Cannot

Infrared light is supposed to be too blurry to see a single molecule. A new technique just proved that wrong, and opened a window into materials that were opaque.
1 month agoarXivPhysics

The Quantum Clock That Was Already Running

Silicon's own electrons can keep its nuclear spins in sync — no microwave hardware required — and that changes what quantum computers have to carry.
1 month agoarXivPhysics

Quantum Machine Learning's Complexity Is Mostly an Illusion

A new proof shows the vast space quantum circuits were built to exploit collapses, for real tasks, into something a classical computer can hold — recasting "quantum advantage," a feat no ordinary machine can match.
1 month agoarXivPhysics

A Fraction-Of-A-Percent Flaw Is All It Takes to Fake Quantum Entanglement

The tests we use to certify quantum entanglement can be fooled by adversarial tweaks far too small to detect — and that may quietly undermine the security of quantum cryptography.
1 month agoarXivPhysics

Quantum Computing Spent Thirty Years Fighting Noise. It May Be the Wrong Enemy.

The machines are built to be sealed off from the world. A fair race between rival methods found that the one that invites the world in wins exactly where the problems get hardest.
1 month agoopenalexPhysics

The 10,000-To-1 Division Ratio Was Always the Wrong Answer

A fiber-ring Brillouin laser just matched the world's best microwave sources with a division ratio three orders of magnitude smaller than the field assumed it needed.
1 month agoarXivPhysics

The Quantum Chemistry Bottleneck May Be Math's Fault, Not Nature's

A molecule that helps feed half the world looked impossibly expensive to simulate. A new proof suggests we'd been doing the arithmetic wrong.
1 month agoarXivPhysics

The Handedness That Hides from Every Test

Physicists thought they had a reliable test for handedness in exotic quantum materials. It turns out they were only looking at three corners of a four-cornered problem.
1 month agoarXivPhysics

The Error-Correction Code That Learned to Fold

The codes that protect quantum computers from their own noise have been unnecessarily simple for a generation — and the fix turns out to be folding the grid like origami.