Marie Slodowska-Curies Fellowship - On-chip hybrid quantum magnonics

Starting date: 01/01/2022  

Project Name: On-chip Quantum Magnonics (OMNI)

MSCA FellowDr Sebastian Knauer

Host Institution: University of Vienna, Faculty of Physics, Nanomagnetism and Magnonics Group (Lead: Univ.-Prof. Dr. Andrii Chumak)

To harness the fundamental properties of nature at small scales, quantum solid-state technological fields, such as quantum simulation and computing, quantum communication, and quantum sensing have been widely investigated in previous years. Now, we are entering a decade in which quantum technologies are persistently combined with each other. With the combination and interaction of quantum systems we are starting to overcome scientific and practical limitations of their individual sub-systems. The field of quantum magnonics, dealing with the quanta of collective spin excitations, offers the unique combination of spin-, phonon-, and photon-quantum systems. This novel field promises a path towards hybrid quantum systems, as it vows to combine quantum systems coherently, across a wide frequency range (sub-GHz to sub-THz).

For this aim different building block on magnonic platforms, such as the material system yttrium ion garnet (YIG), have to be investigated and demonstrated. I will use the uniquely existing knowledge in the field of magnonics at the University of Vienna (UV), and combine it with my strong expertise in the fields of quantum optics, quantum electronics and the nanostructuring of semi-conductors and insulators, to build a dynamical on-chip 3-terminal device (3-TD) in YIG.


2023/09 ÖPG conference Basel. I will present the latest propagating spin-wave spectroscopy results in YIG-nanofilms at cryogenic temperatues.
2023/07/11 ÖFG – International Communication Support! I have just received a small grant from the Österreichische Forschungsgemeinschaft (ÖFG) to perform exciting new spin-wave measurements at CEITEC (Brno - University of Technology, Czech Republic). The project is funded under the ÖFG program of “International Communication”. I’m very happy to learn everything about phase-resolved BLS and all-electrical phase-resolved spin-wave measurements. These measurements will be in particular important for phase resolved measurements in the 3TD. More about the program can be found at:
2023/06/30 Great News! The Innsbruck team around S. Casulleras, O. Romero-Isart, and C. Gonzalez-Ballestero published in collaboration with us a fantastic theoretical paper, entitled "Generation of Spin-Wave Pulses by Inverse Design". This is a very important theoretical step to extend the propagation length of single magnons in the YIG 3TD.
2023/04/11 FIRST millikelvin temperatures propagating spin wave paper published! I’m very excited that we were able to publish the first paper, performing propagating spin wave spectroscopy in a thin film Yttrium-Iron-Garnet sample at millikelvin temperatures. Overcoming challenges in fabrication, measurements at cryogenic temperatures and data analysis was a very stimulating process. The first stone towards OMNI (On-chip Quantum Magnonics) has been laid down!
2023/04/07 Success! First sample with sub-50nm dimensions for complex YIG and antenna structures are fabricated.
2023/02/17 IEEE digest paper at the Intermag2023 on "Propagating Spin-Wave Spectroscopy At Millikelvin Temperatures Using Arbitrary Magnetisation Orientations" as been accepted. Follow it on:
2022/11/02 The invited faculty talk at the School of Physics and Astronomy (Cardiff University) about the latest OMNI results and Hybrid Opto-Magnonic Quantum Systems went very well. I'm looking forward to the next time.
2022/10/13 I enjoyed great discussions and hospitality at the Quantum Engineering Technology Labs (University of Bristol) discussing OMNI and hybrid opt-magnonic quantum systems.
2022/06 I have just finished to fabricate the first 3-Terminal-Devices. Measurements are waiting!
2022/03 I have just obtained a NFFA.EU Research Infrastructure grant (called: Uni-YIG), which will allow us to created even larger opt-magnonic quantum circuits.
2022/01/01 I am very excited to finally start my Marie Sklodowska-Curie individual fellowship on the topic of on-chip quantum magnonics (OMNI).
2021/11 The grant agreement and new contract is signed and all is prepared for a successful start of for OMNI. This is a great time to launch the new webpage and present the logo.