Protocol for generating an arbitrary quantum state of the magnetization in cavity magnonics
Journal of Physics Materials, vol. 5, pp. 034006
Abstract
Abstract We propose and numerically evaluate a protocol to generate an arbitrary quantum state of the magnetization in a magnet. The protocol involves repeatedly exciting a frequency-tunable superconducting transmon and transferring the excitations to the magnet via a microwave cavity. To avoid decay, the protocol must be much shorter than magnon lifetime. Speeding up the protocol by simply shortening the pulses leads to non-resonant leakage of excitations to higher levels of the transmon accompanied by higher decoherence. We discuss how to correct for such leakages by applying counter pulses to de-excite these higher levels. In our protocol, states with a maximum magnon occupation of up to ∼9 and average magnon number up to ∼4 can be generated with fidelity > 0.75.
Authors 3
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Sanchar Sharma corresponding
Max Planck Institute for the Science of Light
Affiliation as printed
Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
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Max Planck Institute for the Science of Light
Affiliation as printed
Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
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RWTH Aachen University · Max Planck Institute for the Science of Light
Affiliation as printed
Institute for Theoretical Solid State Physics, RWTH Aachen University, 52074 Aachen, Germany
Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
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