Henri Lyyra
PhD (theoretical physics)
hesaly@utu.fi : 314 |
open quantum systems; quantum information; quantum optics; optical measurements; semiconductor quantum technologies
Luminous Materials and Devices group
I grew up in the small yet mighty village of Mallusjoki. After highschool, I moved to Turku where I completed my studies from Bachelor’s to Ph.D. at the department of Physics and Astronomy. I worked for 4 years at the University of Jyväskylä before returning to Turku where I joined the Luminous Materials and Devices group as a postdoctoral researcher.
Besides research, I’m also interested in public outreach and teaching.
On my free time I like to cook, practice strength sports, and play a little guitar.
My PhD thesis “Controlling Dynamics of Open Quantum Systems” studies how delicate quantum information changes under noisy conditions. The research considers both how the open system dynamics controls the quantum information encoded in the system, and how the dynamics itself can be controlled. Usually, the open system dynamics is seen as detrimental to information, but it can also be a tool for gaining information. We exploited the loss of information to develop a new approach to quantum measurements, which guarantees that you can trust the measurement’s result even if you don’t know its physical mechanism. Later, we demonstrated in an experimental implementation that such measurements can give conclusive information about the revival of quantum information. The thesis contained purely theoretical studies, but also very rewarding experimental collaborations which inspired me to start making experiments.
After defending my thesis, I worked a postdoctoral researcher at the University of Jyväskylä. There, I trained on performing experiments myself while I worked on developing an optomechanical readout for donor spin qubits in silicon at the group of Hybrid Quantum Technologies in Silicon.
Currently, I am working as a postdoctoral researcher in the Luminous Materials and Devices group in the PLAS-OLED project. I am developing a pump-probe measurement setup for transient absorption and transient reflection measurements. I am interested in combining my experience in the theory of open quantum systems with time-resolved optical measurements, possibly leading to quantum enhancement of future technologies such as OLEDs, batteries or solar cells.
I have run the exercise classes of “Fysiikka 3” in 2016 and “Quantum Mechanics I” in 2017-2019 here at University of Turku.
At University of Jyväskylä, I was the teacher at the exercise sessions of “Introduction to Quantum Computing” and gave a couple of lectures on Shor’s algorithm in 2022.
- Experimental quantum probing measurements with no knowledge of the system-probe interaction (2020)
- Physical Review A
- Experimental realization of high-fidelity teleportation via a non-Markovian open quantum system (2020)
- Physical Review A
- Controlling dynamics of open quantum systems (2019) Lyyra Henri
- Obtaining conclusive information from incomplete experimental quantum tomography (2019)
- Physical Review A
- There is no general connection between the quantum speed limit and non-Markovianity (2019)
- New Journal of Physics
- Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities (2018)
- Nature Communications
- Revealing memory effects in phase-covariant quantum master equations (2018)
- New Journal of Physics
- Fidelity of dynamical maps (2017)
- Physical Review A
- Interaction Independent Quantum Probing (2017)
- Acta Physica Polonica A
- Symmetry in the open-system dynamics of quantum correlations (2017)
- Scientific Reports
- Complete positivity, finite-temperature effects, and additivity of noise for time-local qubit dynamics (2016)
- Physical Review A
- Non-Markovian dynamics in two-qubit dephasing channels with an application to superdense coding (2016)
- Physical Review A