Phys.org (Quantum Physics News)

Dynamical Freezing Can Protect Quantum Information for Near-Cosmic Timescales

Cornell physicists have quantified how long dynamical freezing can protect quantum information, showing it can persist for timescales approaching the age of the universe. Using a new Floquet flow‑renormalization framework, they demonstrated that a precisely tuned periodic drive cancels chaotic thermalization processes via instanton mechanisms. The protection, however, is not permanent; rare quantum jumps eventually cause thermalization after exponentially long periods. The findings suggest a viable strategy for maintaining coherence as quantum processors scale to millions of qubits.