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Interfacing spin waves with superconducting quantum circuits for single magnon creation and detection

Interfacing spin waves with superconducting quantum circuits for single magnon creation and detection

Objective

The proposed project will experimentally interface ferromagnets with superconducting quantum circuits to study dynamics within the magnet. To this end, magnonic elements made up by thin, structured magnetic films will be strongly coupled to the qubit. Superconducting qubits are ideal detectors due to their quantum limited back-action on the measured object and energy resolution.

Spectroscopy and coherence measurements on the hybrid system will be made in order to address fundamental aspects such as spin wave generation, detection, coherence, or wave propagation down to mK temperatures and at ultra-low power (atto-watts). Amplitude and phase noise of spin wave resonators will be determined. At the final stage of the project, the quantum limited resolution of qubits will facilitate single magnon creation and detection. Quantum states are swapped between qubit and magnon, and superpositioned and entangled states will be explored. Monitoring the qubit response to its magnetic environment the low and high-frequency flux noise spectrum of spin waves will be inferred.

The research methodology employs junctions, resonators, and qubits as research objects and detectors. The samples will be characterized at cryogenic temperatures by transport, magnetometry, resonator and qubit setups. Magnetic materials will be deposited and structured beneath or ontop the superconducting quantum circuits.

Exploring spin wave dynamics in thin films by coupling to a superconducting qubit complements conventional measurement techniques based on photon, electron or neutron scattering methods, which require highly populated excitations. The project connects to and extends research objects of ground-breaking nature to open up new horizons for quantum, magnon and spin electronics. Magnetic material physics is enhanced by new research concepts such as quantum resolved spectroscopy and coherence measurements on intrinsic dynamic states.
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Host institution

UNIVERSITY OF GLASGOW

Address

University Avenue
G12 8qq Glasgow

United Kingdom

Activity type

Higher or Secondary Education Establishments

EU Contribution

€ 879 337

Beneficiaries (2)

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UNIVERSITY OF GLASGOW

United Kingdom

EU Contribution

€ 879 337

KARLSRUHER INSTITUT FUER TECHNOLOGIE

Germany

EU Contribution

€ 1 117 000

Project information

Grant agreement ID: 648011

Status

Ongoing project

  • Start date

    1 June 2015

  • End date

    31 May 2020

Funded under:

H2020-EU.1.1.

  • Overall budget:

    € 1 996 337

  • EU contribution

    € 1 996 337

Hosted by:

UNIVERSITY OF GLASGOW

United Kingdom