Demonstration of Quantum Information Delocalization in a Periodically Driven System

A collaborative research team, including Visiting Scientists Yuta Kikuchi and Tomoya Hayata, has demonstrated that a scrambled state—in which quantum information becomes delocalized—can be prepared using a quantum circuit that simulates a periodically driven system. This was achieved with an ion-trap quantum computer.

Scrambled states possess characteristics that are expected to be beneficial for quantum information recovery and many-body quantum system computations. This achievement represents an early-stage application of quantum computing in an academic research domain where physical phenomena and quantum information intersect, and is anticipated to contribute to the promotion of quantum computing utilization in Japan.

In this study, the research team confirmed that a scrambled state—previously typically discussed using random quantum circuits—can also be prepared using periodically driven quantum circuits. This was validated through a combination of practical implementation on a high-fidelity quantum computer, appropriate error mitigation techniques, and theoretical analysis.

For further details, please refer to the press release available via the related link.