Quantum Journal

Quantum And Cybersecurity: A Dual Imperative Of Threat And Opportunity - Forbes

Einstein’s “spooky action” just survived one of physics’ most extreme tests

Physicists have detected strong evidence that heavy, fleeting Z bosons can become quantum entangled during Higgs boson decays at CERN’s Large Hadron Collider. The result shows that Einstein’s “spooky action at a distance” survives even under some of the most extreme conditions ever created in a laboratory.

IBM Research Demonstrates Hybrid Spacetime PEC to Reduce Error-Mitigation Sampling Overhead by 63×

IBM Research has introduced Spacetime Probabilistic Error Cancellation (Spacetime PEC), a hybrid error-handling framework that significantly reduces the sampling overhead in quantum computing. This new protocol combines Probabilistic Error Cancellation (PEC) with post-selected Quantum Error Detection (ED), achieving up to a 63-fold reduction in sampling overhead compared to standard PEC. The approach was experimentally validated on IBM's 27-qubit heavy-hex superconducting processor, demonstra...

University of Pennsylvania Demonstrates Single-Gate Parallel Entanglement on Room-Temperature Diamond Quantum Register

University of Pennsylvania researchers have achieved a breakthrough in quantum computing by demonstrating single-gate, parallelized multipartite entanglement on a room-temperature diamond quantum register. They successfully generated a four-qubit Greenberger–Horne–Zeilinger (GHZ) state in just 14.8 microseconds, a tenfold speedup over traditional methods, with significantly improved fidelity. This new approach, detailed in Nature Nanotechnology, converts inherent crosstalk into parallel condi...