Quantum Mirrors
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Related Articles from SNS
Continuous-Variable Quantum State Tomography Enabled by Quantum Mirrors
Announce Type: cross Abstract: In quantum technologies, continuous-variable systems offer advantages over their discrete counterparts. However, continuous-variable tomography suffers from exponentially growing sample complexity. We propose protocols using quantum mirrors to transfer the complete information of incident photonic states onto a control atomic system.
Photons behave very strangely if you try to cut them
In Greek mythology, cutting one head off the Hydra of Lerna simply resulted in two more heads growing to replace it – and it turns out it’s even worse for photons. If you try to cut a piece off a particle of light, the result is infinitely many more of them being created. Some particles are elementary, which means that they cannot be broken into smaller pieces.
Distant blazar OP 313 emits very high-energy gamma rays above 100 GeV
June 3, 2026 report Distant blazar OP 313 emits very high-energy gamma rays above 100 GeV Tomasz Nowakowski Author Stephanie Baum Scientific Editor Robert Egan Associate Editor An international team of astronomers have employed one of the Large-Sized Telescopes (LSTs) at the Cherenkov Telescope Array Observatory (CTAO) to observe a distant blazar known as OP 313. Results of the observational campaign, published May 26 on the arXiv preprint server, shed more light on the behavior and nature...
Researchers craft a new, simple recipe for highly entangled quantum states
Researchers craft a new, simple recipe for highly entangled quantum states Sadie Harley Scientific Editor Andrew Zinin Lead Editor Building useful quantum technologies—from sensors to computers—requires generating highly complex entangled states, in which the properties of particles are deeply intertwined. Producing such states has traditionally required complex tools and carefully engineered setups with many parts. Now, researchers at the University of Chicago Pritzker School of Molecular...
Scientists found a surprisingly simple way to create powerful quantum states
Scientists found a surprisingly simple way to create powerful quantum states A simple tweak to a common quantum system could unlock powerful new quantum states for ultra-precise sensing and future quantum technologies. - Date: - June 6, 2026 - Source: - University of Chicago - Summary: - A team at the University of Chicago has discovered a surprisingly simple way to create powerful quantum states that are normally difficult to produce.
Observation of resonant doublet and variable finesse in a tabletop meter-scale linear three-mirror cavity
arXiv:2505.03416v2 Announce Type: replace Abstract: Fabry-Perot cavities are widely used in current gravitational-wave detectors. In particular, they play a key role in frequency-dependent squeezing systems, enabling broadband quantum noise reduction. However, their ability to precisely control squeezing properties may be insufficient for the next generation of detectors.
Identifying Quantum Structure in AI Language: Evidence for Evolutionary Convergence of Human and Artificial Cognition
arXiv:2511.21731v2 Announce Type: replace Abstract: We present the results of cognitive tests on conceptual combinations, performed using specific Large Language Models (LLMs) as test subjects. In the first test, performed with ChatGPT and Gemini, we show that Bell's inequalities are significantly violated, which indicates the presence of a 'non-classical probability model' with probabilities that do not satisfy Kolmogorov's axioms. In the second test, also performed using ChatGPT and...
Cutting a photon in two creates an infinite swarm of particles
June 2, 2026 report Cutting a photon in two creates an infinite swarm of particles Sam Jarman Author Gaby Clark Scientific Editor Robert Egan Associate Editor By definition, elementary particles can't be broken into smaller pieces. But in a new theoretical study published in Physical Review Letters, Johannes Skaar and colleagues have revealed what would happen if you tried anyway for a single photon. The answer is deeply strange: attempting to cut a photon in two wouldn't produce two smaller...
A Phase Space Signature of Quantum Roaming in Chesnavich's Model
Announce Type: new Abstract: Roaming reactions occur when a molecule enters a near-dissociation region, avoids immediate separation, and later forms products by a pathway not controlled by the conventional tight transition-state bottleneck. Classical studies have shown that roaming is best understood in phase space: inner and outer transition-state structures, together with their invariant manifolds, organize trapping, return, and dissociation. The corresponding quantum question is less settled.
Coherent Swap Regret and Channel-Proof Learning
arXiv:2606.02655v1 Announce Type: cross Abstract: External regret certifies stability only against replacing one's behavior by a fixed alternative. In a quantum game, this misses a natural physical move: a player can apply a local completely positive trace-preserving (CPTP) map to the state it actually received or prepared.