"Postdoctoral Researcher"

The Quantum Nanomechanics group at the Department of Applied Physics is seeking outstanding candidates for the position of Postdoctoral Researcher to conduct experimental research in projects related to quantum micromechanical systems. Our team investigates how mechanical oscillators can be utilized for fundamental studies probing quantum mechanics in massive systems, as well as for applications in quantum information processing. The measurements are carried out at deep cryogenic temperatures in dilution refrigerators.

Project 1: Gravitational coupling between nonclassical masses. This project aims to address one of the great unresolved challenges in physics: While quantum mechanics successfully describes low-energy phenomena, it is incompatible with general relativity which governs gravity and huge energies. The interface between these two has remained experimentally elusive. We aim at detecting gravitational forces for the first time within a quantum system. We use mechanical oscillators loaded by milligram masses and bring two such gravitationally interacting oscillators into nonclassical motional states. The initial phase focuses on measuring the gravitational force between milligram-scale gold particles. This work is part of the ERC Advanced Grant project "GUANTUM: Probing the limits of quantum mechanics and gravity with micromechanical oscillators".

Project 2: Remote connection and strong coupling in coherent electromechanics. We utilize microwave optomechanical devices, where micromechanical membrane oscillators interact with on-chip microwave cavity resonators. Optomechanical techniques allow for preparing, measuring, and manipulating mechanical quantum states. We aim to extend this to remotely connected electromechanical systems capable of sharing a quantum state. This opens possibilities for fundamental studies in remote entanglement and quantum teleportation, as well as ultra-sensitive detection of weak forces. In this project, two electromechanical quantum chips are connected via superconducting cables at millikelvin temperatures. The vibrating membranes will be realized with a phononic crystal radiation shield. This work is part of the European Union’s Quantera Program project "MQSens: Quantum Sensing with Nonclassical Mechanical Oscillators".

Your role: The experimental work involves design of samples and measurement setups, cleanroom fabrication, performing cryogenic microwave measurements, and data analysis. You are expected to participate in advising and mentoring PhD students.

Your experience and ambitions: We are looking for brilliant and energetic individuals motivated in experimental, low-temperature quantum physics. Candidates must have a proven track record in experimental research with similar topics, cleanroom microfabrication, and strong interest in micromechanical systems. They should be excellent team players. Experience with cryogenics and dilution refrigerators, and skill in theoretical understanding, are assets. Excellent English skills are required; Finnish is not. A PhD degree in a suitable field is necessary.

What we offer: The Quantum Nanomechanics team conducts cutting-edge experimental research. The fixed-term contract is typically for two years and can be extended. The starting salary is approximately 4130 €/month, ranging from 4130 € to 4540 € per month, depending on experience. The contract includes occupational healthcare.

To apply, submit your application including: 1. Letter of motivation, 2. CV including list of publications, 3. Degree certificates, 4. Contact details of at least two referees as one single PDF document in English through our online recruitment system by using the link on Aalto University’s web page.

The deadline for applications is November 30, 2025. For additional information, contact Prof. Mika Sillanpää at Mika.Sillanpaa@aalto.fi.