I am currently a postdoctoral researcher at the RIKEN Cluster for Pioneering Research in Saitama, Japan. Here, I am working in the Theoretical Quantum Physics Laboratory, studying the thermodynamics of quantum systems. My research is supported by the Japan Society for the Promotion of Science and the Alexander von Humboldt foundation.
When we study the behavior of objects as small as a few atoms, we find that they do not follow the same physical laws that we know from our daily experience. Such quantum objects can spontaneously teleport, exist in multiple states at once—like Schrödinger's famous cat—and be correlated with each other over long distances. However, when a large number of quantum objects is brought together, these non-intuitive effects vanish quickly. The quantum systems seemingly conspire to collectively hide their true nature and we are unable to observe any quantum behavior in everyday, macroscopic items.
It is thus not surprising that it has taken almost a century from the discovery of quantum physics until its first direct technological applications. Nowadays, research groups and companies around the world are implementing prototypes of advanced quantum technology. For example, quantum computers will soon be able to perform certain calculations using quantum superposition states more efficiently than their traditional counterparts.
This development motivates us to investigate whether devices such as motors, refrigerators or other thermal machines might also profit from quantum effects. To answer this question, we theoretically study the laws of thermodynamics on the quantum scale, examine bounds on the performance of nanoscopic thermal machines, and try to find optimal control schemes for such devices. The results of these investigations will not only be useful for scientists engineering thermal management for quantum computers, it will also help us better understand the thermodynamics of strongly coupled open quantum systems and shed new light on the border between quantum and classical physics. As first studies of quantum-scale thermal machines are currently being carried out in labs, it is exciting to see how our theory will compare to real-world data.
A Cooper-Pair Box Architecture for Cyclic Quantum Heat Engines
arXiv:2109.03023 [quant-ph] (2021).
Thermodynamic uncertainty relations for coherently driven open quantum systems
J. Phys. A 54, 314002 (2021).
Quantum jump approach to microscopic heat engines
Phys. Rev. Research 2, 033449 (2020).
Thermodynamics of cyclic quantum amplifiers
Phys. Rev. A 101, 052106 (2020).
Limit cycles in periodically driven open quantum systems
J. Phys. A 52, 43LT01 (2019).
Two-stroke optimization scheme for mesoscopic refrigerators
Phys. Rev. B 99, 224306 (2019).
Universal First-Passage-Time Distribution of Non-Gaussian Currents
Phys. Rev. Lett 122, 230602 (2019).
Photon counting statistics of a microwave cavity
Phys. Rev. B 99, 085418 (2019).
Coherent Thermal Machines: Fluctuations and Performance
Doctoral dissertation, Aalto University (2020).
Download • University publication archive • Press release
Model Building in F-Theory Using Hypercharge Fluxes
Master's Thesis, Heidelberg University (2016).
Modellierung von offenen Quantensystemen mit kohärenten Zuständen
Bachelor's Thesis, University of Stuttgart (2012).