Control of hyperfine interaction in broker-client systems

Abstract

Methods and systems for protecting a quantum state of a client quantum system of a broker-client system are disclosed. The client-broker system comprises the client quantum system and a broker quantum system coupled by a hyperfine interaction. The method comprises suppressing the hyperfine interaction by applying an electromagnetic dressing field to the client-broker system in the presence of a first magnetic field. The electromagnetic dressing field comprises a second magnetic field that oscillates in a direction perpendicular to the first magnetic field. While the hyperfine interaction is suppressed, a quantum state of the broker quantum system may be altered by steps including optically exciting the broker quantum system. The method may be applied to reduce decoherence of the quantum state of the client quantum system while resetting a quantum state of the broker quantum system.

Dependencies are inferred from the claim text.