![]() The experimental work in all these projects involves design of the samples and of the measurement setups, cleanroom fabrication, running microwave measurements in dilution refrigerators, and data analysis. In the latter structures, we couple magnons to longitudinal overtone (HBAR) acoustic modes, and to surface acoustic waves. We use vibrating magnetic nanobeams, or multilayer structures consisting of magnetic and piezoelectric layers. ![]() The small footprint of these hybrid devices shows promise for applications in novel signal processing. An alternative scheme with much smaller footprint is provided by magneto acoustics, where the electromagnetic cavity is replaced by a magnet undergoing ferromagnetic resonance, and the optomechanical coupling originates from magnetic shape anisotropy. Owing to the large speed of light, realizing cavity optomechanics in the microwave frequency range requires cavities up to several mm in size, hence making it hard to embed several of them on the same chip. To realize processing of flying quantum phonons on a chip, we will connect standing HBAR modes into phonon waveguides which can be used to connect qubits.īesides electromechanics, we are building hybrid devices that aim on controlling ferromagnetic magnons using acoustic waves. This will allow for creating mechanical entanglement, and is a step towards phononic quantum chips. In ongoing and future work, we are promoting the devices to host several qubits, each coupled one or several HBAR modes. We are working on High-Overtone Bulk Acoustic (HBAR) resonances that extend through the chip, and couple resonantly to transmon qubits. Initially, we will measure the gravitational force between gold particles weighing a milligram, representing a new mass scale showing gravitational forces within a system.įor quantum technology, integrating acoustic modes into superconducting circuits shows great promise for applications as quantum memory elements, bosonic codes, or in frequency conversion. We use mechanical oscillators loaded by milligram masses and bring two such gravitationally interacting oscillators into nonclassical motional states. We aim at detecting gravitational forces for the first time within a quantum system. The interface between these two has remained experimentally elusive, because only the most violent events in the universe have been considered to produce measurable effects due to the plausible quantum behavior of gravity. In this project, the goal is to touch a hundred-year-old mystery of physics: Despite its success at describing phenomena in the low-energy limit, quantum mechanics is incompatible with general relativity that describes gravity and huge energies. Project 1: Gravitational coupling between nonclassical masses In our research, we have demonstrated quantum entanglement between two micromechanical oscillators realized as vibrating aluminum drumheads. In our team, we investigate how mechanical oscillators can be utilized for fundamental research probing quantum mechanics in massive systems, or for usage in quantum information processing. To carry out experimental research on different projects related to quantum micromechanical systems. The Quantum Nanomechanics group at the Department of Applied Physics is looking for outstanding This is why we warmly encourage qualified candidates from all backgrounds to join our community. Diversity is part of who we are, and we actively work to ensure our community’s diversity and inclusiveness in the future as well. Our main campus is located in Espoo, Finland. Aalto has six schools with nearly 11 000 students and a staff of more than 4000, of which 400 are professors. We are committed to identifying and solving grand societal challenges and building an innovative future. ![]() Aalto University is a community of bold thinkers where science and art meet technology and business.
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