669 citations · 4.5k across the 47 of their papers we have counts for
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Multiphonon transitions in a quantum electromechanical system
Alpo Välimaa, Wayne Crump, Mikael Kervinen +1
We investigate a superconducting qubit coupled to a quantum acoustic system in a near resonant configuration. In our system we measure multiphonon transitions, whose spectrum revea…
Magnomechanics in suspended magnetic beams
Kalle S. U. Kansanen, Camillo Tassi, Harshad Mishra +2
Cavity optomechanical systems have become a popular playground for studies of controllable nonlinear interactions between light and motion. Owing to the large speed of light, reali…
Sideband control of a multimode quantum bulk acoustic system
Mikael Kervinen, Alpo Välimaa, Jhon E. Ramírez-Muñoz +1
Multimode bulk acoustic systems show promise for use in superconducting quantum computation. They can serve as a medium term memory storage, with exceptional coherence times demons…
Landau-Zener-Stückelberg interference in a multimode electromechanical system in the quantum regime
Mikael Kervinen, Jhon E. Ramírez-Muñoz, Alpo Välimaa +1
The studies of mechanical resonators in the quantum regime not only provide insight into the fundamental nature of quantum mechanics of massive objects, but also introduce promisin…
Entangled massive mechanical oscillators
C. F. Ockeloen-Korppi, E. Damskagg, J. -M. Pirkkalainen +4
An entangled quantum state of two or more particles or objects exhibits some of the most peculiar features of quantum mechanics. Entangled systems cannot be described independently…
Noiseless quantum measurement and squeezing of microwave fields utilizing mechanical vibrations
C. F. Ockeloen-Korppi, E. Damskägg, J. -M. Pirkkalainen +3
A process which strongly amplifies both quadrature amplitudes of an oscillatory signal necessarily adds noise. Alternatively, if the information in one quadrature is lost in phase-…
Theory of noiseless phase-mixing amplification in a cavity optomechanical system
C. F. Ockeloen-Korppi, T. T. Heikkilä, M. A. Sillanpää +1
The investigation of the ultimate limits imposed by quantum mechanics on amplification represents an important topic both on a fundamental level and from the perspective of potenti…
Dynamically creating tripartite resonance and dark modes in a multimode optomechanical system
E. Damskägg, J. -M. Pirkkalainen, M. A. Sillanpää
We study a multimode optomechanical system where two mechanical oscillators are coupled to an electromagnetic cavity. Previously it has been shown that if the mechanical resonances…
Optomechanical measurement of a millimeter-sized mechanical oscillator near the quantum limit
J. T. Santos, J. Li, J. Ilves +2
Cavity optomechanics is a tool to study the interaction between light and micromechanical motion. Here we observe near-quantum limited optomechanical physics in a truly macroscopic…
Quantum back-action evading measurement of collective mechanical modes
C. F. Ockeloen-Korppi, E. Damskägg, J. -M. Pirkkalainen +3
The standard quantum limit constrains the precision of an oscillator position measurement. It arises from a balance between the imprecision and the quantum back-action of the measu…
Low-noise amplification and frequency conversion with a multiport microwave optomechanical device
C. F. Ockeloen-Korppi, E. Damskägg, J. -M. Pirkkalainen +3
High-gain amplifiers of electromagnetic signals operating near the quantum limit are crucial for quantum information systems and ultrasensitive quantum measurements. However, the e…
Squeezing of quantum noise of motion in a micromechanical resonator
J. -M. Pirkkalainen, E. Damskägg, M. Brandt +2
A pair of conjugate observables, such as the quadrature amplitudes of harmonic motion, have fundamental fluctuations which are bound by the Heisenberg uncertainty relation. However…
Single-photon cavity optomechanics mediated by a quantum two-level system
J. -M. Pirkkalainen, S. U. Cho, F. Massel +4
Coupling electromagnetic waves in a cavity and mechanical vibrations via the radiation pressure of the photons [1,2] is a promising platform for investigations of quantum mechanica…
Graphene optomechanics realized at microwave frequencies
X. Song, M. Oksanen, J. Li +2
Cavity optomechanics has served as a platform for studying the interaction between light and micromechanical motion via radiation pressure. Here we observe such phenomena with a gr…
Simulation of motional averaging using a superconducting circuit
J. Li, M. P. Silveri, K. S. Kumar +8
The possibility of using a quantum system to simulate another one has been recognized for a long time as an important research direction in quantum information and quantum computin…
Enhancing optomechanical coupling via the Josephson effect
Tero T. Heikkilä, Francesco Massel, Jani Tuorila +2
Cavity optomechanics is showing promise for studying quantum mechanics in large systems. However, smallness of the radiation-pressure coupling is a serious hindrance. Here we show…
Charge qubit driven via the Josephson nonlinearity
Jani Tuorila, Matti Silveri, Mika Sillanpää +3
We study the novel nonlinear phenomena that emerge in a charge qubit due to the interplay between a strong microwave flux drive and a periodic Josephson potential. We first analyze…
Micromanipulation transfer of membrane resonators for circuit optomechanics
Maria Berdova, Sung Un Cho, Juha-Matti Pirkkalainen +4
A capacitive coupling between mechanical resonator and a microwave cavity enables readout and manipulation of the vibrations. We present a setup to carry out such experiments with…
Hybrid circuit cavity quantum electrodynamics with a micromechanical resonator
J. M. Pirkkalainen, S. U. Cho, Jian Li +3
Hybrid quantum systems with inherently distinct degrees of freedom play a key role in many physical phenomena. Famous examples include cavity quantum electrodynamics, trapped ions,…
Multimode circuit optomechanics near the quantum limit
Francesco Massel, Sung Un Cho, Juha-Matti Pirkkalainen +3
The coupling of distinct systems underlies nearly all physical phenomena and their applications. A basic instance is that of interacting harmonic oscillators, which gives rise to,…
Motional Averaging in a Superconducting Qubit
Jian Li, M. P. Silveri, K. S. Kumar +8
Superconducting circuits with Josephson junctions are promising candidates for developing future quantum technologies. Of particular interest is to use these circuits to study effe…
Microwave amplification with nanomechanical resonators
F. Massel, T. T. Heikkilä, J. -M. Pirkkalainen +4
Sensitive measurement of electrical signals is at the heart of modern science and technology. According to quantum mechanics, any detector or amplifier is required to add a certain…
Macroscopic quantum tunneling in nanoelectromechanical systems
Mika A. Sillanpaa, Raphael Khan, Tero T. Heikkila +1
The experimental observation of quantum phenomena in mechanical degrees of freedom is difficult, as the systems become linear towards low energies and the quantum limit, and thus r…
Dynamical Autler-Townes control of a phase qubit
Jian Li, G. S. Paraoanu, Katarina Cicak +5
Routers, switches, and repeaters are essential components of modern information-processing systems. Similar devices will be needed in future superconducting quantum computers. In t…