Strong Magnetomechanical Coupling and High Single-Photon Cooperativity using a membrane coupled to a SQUID
ORAL
Abstract
For years, electromechanical interaction has been the standard mechanism for coupling mechanical resonators to superconducting LC circuits. When membranes are used as resonators, one portion of them is coated by a conductive material acting as part of the capacitor of the LC circuit [1-3]. However, reducing the parallel plate capacitor gap below 50 nm is extremely challenging, setting an upper-bound limit on the electromechanical single-photon coupling strength at around g0 = 300 Hz.
In this talk, I will build from the recent achievements in magnetomechanics [4] to enhance the coupling strength between a membrane and a superconducting circuit. In our scheme, one portion of the membrane is equipped with a magnetic material that couples to the inductance of the circuit, rather than its capacitance. I will provide experimental evidences of increased coupling strength g0 well above 1 kHz, leading to high single-photon cooperativity in our systems. These preliminary results strongly suggest that our magnetomechanical systems could be a promising candidate to finally achieve the strong-coupling regime in microwave optomechanics.
[1]. Andrews, R.W.; Peterson, R.W.; Purdy, T.P.; Cicak, K.; Simmonds, R.W.; Regal, C.A.; Lehnert, K.W. Bidirectional and Efficient Conversion between Microwave and Optical Light. Nat. Phys. 2014, 10, 321–326.
[2]. Delaney, R.D.; Urmey, M.D.; Mittal, S.; Brubaker, B.M.; Kindem, J.M.; Burns, P.S.; Regal, C.A.; Lehnert, K.W. SuperconductingQubit Readout via Low-Backaction Electro-Optic Transduction. Nature 2022, 606, 489–493
[3]. Brubaker, B.M.; Kindem, J.M.; Urmey, M.D.; Mittal, S.; Delaney, R.D.; Burns, P.S.; Vissers, M.R.; Lehnert, K.W.; Regal, C.A. Optomechanical Ground-State Cooling in a Continuous and Efficient Electro-Optic Transducer. Phys. Rev. X 2022, 12, 021062.
[4]. Zoepfl D, Juan ML, Schneider CMF, Kirchmair G. Single-Photon Cooling in Microwave Magnetomechanics. Phys Rev Lett. 2020 Jul 7;125(2):023601.
In this talk, I will build from the recent achievements in magnetomechanics [4] to enhance the coupling strength between a membrane and a superconducting circuit. In our scheme, one portion of the membrane is equipped with a magnetic material that couples to the inductance of the circuit, rather than its capacitance. I will provide experimental evidences of increased coupling strength g0 well above 1 kHz, leading to high single-photon cooperativity in our systems. These preliminary results strongly suggest that our magnetomechanical systems could be a promising candidate to finally achieve the strong-coupling regime in microwave optomechanics.
[1]. Andrews, R.W.; Peterson, R.W.; Purdy, T.P.; Cicak, K.; Simmonds, R.W.; Regal, C.A.; Lehnert, K.W. Bidirectional and Efficient Conversion between Microwave and Optical Light. Nat. Phys. 2014, 10, 321–326.
[2]. Delaney, R.D.; Urmey, M.D.; Mittal, S.; Brubaker, B.M.; Kindem, J.M.; Burns, P.S.; Regal, C.A.; Lehnert, K.W. SuperconductingQubit Readout via Low-Backaction Electro-Optic Transduction. Nature 2022, 606, 489–493
[3]. Brubaker, B.M.; Kindem, J.M.; Urmey, M.D.; Mittal, S.; Delaney, R.D.; Burns, P.S.; Vissers, M.R.; Lehnert, K.W.; Regal, C.A. Optomechanical Ground-State Cooling in a Continuous and Efficient Electro-Optic Transducer. Phys. Rev. X 2022, 12, 021062.
[4]. Zoepfl D, Juan ML, Schneider CMF, Kirchmair G. Single-Photon Cooling in Microwave Magnetomechanics. Phys Rev Lett. 2020 Jul 7;125(2):023601.
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Presenters
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Olivier-Michel Tardif
Universite de Sherbrooke
Authors
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Olivier-Michel Tardif
Universite de Sherbrooke
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Nicolas-Ivan Gonzalez-Mora
Université de Sherbrooke
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Lukas Felix Deeg
University of Innsbruck
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Christian Dejaco
University of Innsbruck
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Gerhard Kirchmair
University of Innsbruck
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Mathieu L Juan
Université de Sherbrooke, Universite de Sherbrooke