Quantum-inspired cavity-magnon polaritons experiments: From coherence at ultra-low temperatures over multi-tone manipulation to time-resolved control

#Quantum #magnonics #cavity #magnon #polaritons #milli-Kelvin

Integrating spin-wave and superconducting technologies is a promising method
for creating novel hybrid devices for future information processing technologies
to store, manipulate, or convert data in both classical and quantum regimes.
Such hybrid devices can also exhibit interesting properties such as new resonance
spectra features induced by the interchange between superconducting microwave
lines and ferromagnetic resonance dynamics of yttrium iron garnet (Y3Fe5O12, YIG)
films. We will report on a series of microwave experiments with YIG films.
YIG samples were studied from the classical to the quantum regime where
the thermal energy is less than one resonant microwave quanta, i.e. at 
temperatures below 1 K. Limiting effects of the intrinsic magnon linewidth,
representing the coherence time of a quantum memory, at milliKelvin temperatures
are reported. By applying two tones to the cavity and magnon the steering between
level repulsion and attraction has been demonstrated, with a broad tunability
of two-port driven cavity magnon-polaritons. Fast manipulations of the different
CMP modes with independent but coherent pulses to the cavity and magnon system
have been realized. Moving from the cavity to thin-film superconducting resonators,
the strong magnon-photon coupling with chip-integrated YIG in the zero-temperature
limit has been achieved, a crucial step toward fabrication of functional hybrid
quantum devices that advantage from spin-wave and superconducting components.

• Date: 25 Jun 2021
• Time: 11:00 AM to 12:00 PM
• All times are (UTC-06:00) Mountain Time (US & Canada)
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• 1420 Austin Bluffs Pkwy
• Colorado Springs, Colorado
• United States 80918
• Building: Osborne Center for Science and Engineering
• Room Number: A204

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• Co-sponsored by UCCS

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Prof Martin Weides holds a Chair in Quantum Technologies at
the James Watt School of Engineering, University of Glasgow
and is Consultant Technical Director with Oxford Instruments
NanoScience. Martin obtained a PhD in Physics from the
University of Cologne and joined Glasgow in 2018. 
By engineering superconducting resonators, qubits, and
hybrid quantum systems his research group investigates
quantum computing, sensing and magnonic applications.