Anti-butterfly effect enables new benchmarking of quantum-computer performance: Running a quantum system backward, then forward in time distinguishes information leaks from the desired information scrambling
Research drawing on the quantum “anti-butterfly effect” solves a longstanding experimental problem in physics and establishes a method for benchmarking the performance of quantum computers. “Using the simple, robust protocol we developed, we can determine the degree to which quantum computers can effectively process information, and it applies to information loss in other complex quantum […]
Quantum sensor can detect electromagnetic signals of any frequency: Engineers expand the capabilities of these ultrasensitive nanoscale detectors, with potential uses for quantum computing and biological sensing.
Quantum sensors, which detect the most minute variations in magnetic or electrical fields, have enabled precision measurements in materials science and fundamental physics. But these sensors have only been capable of detecting a few specific frequencies of these fields, limiting their usefulness. Now, researchers at MIT have developed a method to enable such sensors to […]
Quantum computer programming basics
For would-be quantum programmers scratching their heads over how to jump into the game as quantum computers proliferate and become publicly accessible, a new beginner’s guide provides a thorough introduction to quantum algorithms and their implementation on existing hardware. “Writing quantum algorithms is radically different from writing classical computing programs and requires some understanding of […]
Computational sleuthing confirms first 3D quantum spin liquid: Numerical detective work verifies liquidlike magnetic order in prior experiments
Computational detective work by U.S. and German physicists has confirmed cerium zirconium pyrochlore is a 3D quantum spin liquid. Despite the name, quantum spin liquids are solid materials in which quantum entanglement and the geometric arrangement of atoms frustrate the natural tendency of electrons to magnetically order themselves in relation to one another. The geometric […]
Event horizons are tunable factories of quantum entanglement: Physicists’ research findings open a promising avenue for confirming the quantum origin of the Hawking radiation
LSU physicists have leveraged quantum information theory techniques to reveal a mechanism for amplifying, or “stimulating,” the production of entanglement in the Hawking effect in a controlled manner. Furthermore, these scientists propose a protocol for testing this idea in the laboratory using artificially produced event horizons. These results have been recently published in Physical Review […]
Exotic quantum particles — less magnetic field required: Research paves the way for future quantum devices and applications
Exotic quantum particles and phenomena are like the world’s most daring elite athletes. Like the free solo climbers who scale impossibly steep cliff faces without a rope or harness, only the most extreme conditions will entice them to show up. For exotic phenomena like superconductivity or particles that carry a fraction of the charge of […]
‘Back to basics’ approach helps unravel new phase of matter
A new phase of matter, thought to be understandable only using quantum physics, can be studied with far simpler classical methods. Researchers from the University of Cambridge used computer modelling to study potential new phases of matter known as prethermal discrete time crystals (DTCs). It was thought that the properties of prethermal DTCs were reliant […]