Quantum Echoes Algorithm:
Google announced that its quantum processor “Willow” has achieved the first-ever verifiable quantum advantage using a new algorithm called Quantum Echoes, running 13,000 times faster than the world’s best supercomputers.Quantum Echoes is an advanced quantum algorithm based on the principle of out-of-time-order correlators (OTOC). It is designed to study how information spreads, scrambles, and reverses in a quantum system — essentially acting as a time-reversal experiment to detect hidden quantum interactions.Created by the Google Quantum AI and Collaborators Team.Aim is to demonstrate a verifiable quantum advantage, where quantum hardware outperforms classical supercomputers in a measurable and repeatable way, to model complex quantum interactions with unprecedented precision for use in physics, chemistry, and materials research.The algorithm sends a quantum signal into a system of qubits, lets it evolve, then reverses time evolution to produce a measurable “echo.” This echo reveals how information was scrambled and restructured during the process. By adding a small “perturbation” midway and observing how the system reacts, scientists can measure interference effects, confirming the quantum nature of the computation.The process, run on the Willow quantum processor, was verified as a true quantum interference phenomenon, impossible for classical systems to replicate efficiently.
