Professor and Group Leader
Email: balatsky@kth.se and alexander.balatsky@uconn.edu
Quantum Printing
Hennadii Yerzhakov received his PhD in Physics in 2021 from the University of Alberta, Edmonton, Canada. His PhD thesis was devoted to the study of quantum phase transitions in Dirac electron systems and was supervised by Prof. Joseph Maciejko. After that, Hennadii did his first postdoc at Bar-Ilan University in Ramat Gan, Israel, where he focused on research in superconductivity theory. Since October 2023, he has been a postdoctoral fellow at Nordita in Stockholm, Sweden, exploring novel phenomena arising from the interactions of electromagnetic waves/light with superconductors.
Tien-Tien Yeh is an experimental and computational physicist working on nonequilibrium phenomena in condensed-matter and quantum materials. Her recent research focuses on light–matter interactions, using time-dependent Ginzburg–Landau models and large-scale simulations to study how optical driving reshapes superconducting order, supercurrents, and topological excitations.
A central theme of her work is quantum printing: a non-thermal, non-magnetic approach that uses structured light to imprint phase, angular momentum, and topology into superconducting condensates. Beyond controlled imprinting, these works also reveal that light-induced vortex states exhibit current-assisted confinement–deconfinement dynamics and establish a non-thermal vortex phase diagram.
Originally from Jacksonville, Florida, Evan Wilson is currently pursuing a Ph.D. in Physics at the University of Connecticut. His research focuses on light–matter interactions, using time-dependent Ginzburg–Landau theory to study how optical driving reshapes superconducting order and supercurrents. Currently, he is investigating the superconducting diode effect within a quantum printing framework.
ML and Materials for Qubits
Machine Learning and Materials for Qubits
Email: avinash.pathapti@su.se
Avinash is a graduate student who broadly focuses on the statistical physics and quantum field theory (QFT) foundations of neural networks. I am particularly interested in developing statistical physics and QFT-based approaches to better understand feature learning in neural networks. In parallel, he is interested in applying AI methods to the discovery of novel materials.
Quantum Sensors and Qubits
Patrick is a postdoc in the TQM group who spends time at both Nordita and the UConn. His current research activities are centered around analyzing the effects of gravitation on solid-state condensed matter systems, particularly those which are relevant for quantum information and quantum computation platforms. This research is done from the perspective of fundamental physics, but with an eye towards laying the ground work for developing next-generation quantum sensors. Patrick also contributes to the quantum printing project, where his work demonstrated the printing of large magnetic states in highly excited atoms and doped semiconductors.
Guest Members
Daemo Kang is a PhD student at the University of Tokyo working in condensed matter theory, with research focused on nonequilibrium superconductivity driven by structured light, especially optical vortex beams and related quantum printing concepts for imprinting controllable phase and vortex textures. His work also emphasizes collective-mode physics, including how light can couple to collective modes such as the Higgs mode.
Alumni
Quantum computation is a fast-growing field with applications from the biomedical industry to new technologies. However, one fundamental problem in this field concerns finding the ideal materials for quantum technology. This question is of central importance for the field of superconducting quantum technology, where two-level system defects (TLSs) in amorphous tunnelling junction oxides remain a major source of decoherence. Within the Balatsky group, Joshuah has worked on applying cutting edge materials science to better understand the origin and consequences of TLSs. By treating TLSs as soft (i.e., low-frequency) bosonic modes, we have found that a single TLS at the amorphous-oxide surface will result in a localized "hot spot" of amplified Josephson current [1]. In addition, we have shown that TLSs can enhance the superconducting critical temperature and zero-temperature gap of thin-film aluminum, opening up new avenues for TLS engineering [2].
[1] Heath et al., Phys. Rev. Applied 25, 014022 (2026)
[2] Heath et al., arXiv:2510.23710 (2025)
Originally from California, Alex Tyner completed his PhD in applied physics at Northwestern University, focusing on the discovery and diagnosis of topological quantum matter. He is motivated by both practical problems and abstract mathematical concepts. He enjoys building computational tools to accelerate progress at the intersection of industry and academia, often incorporating AI and density functional theory. He is currently focused on improving superconducting qubits.
Yuefei Liu earned his PhD in Physics from KTH Royal Institute of Technology (Sweden) in July 2024. His doctoral thesis focused on quantum entanglement in magnonics and Landau–Lifshitz dynamics. He then completed a first postdoctoral appointment at Uppsala University (Sweden), where his research centered on quantum Landau–Lifshitz dynamics. Until then, his research was mainly supervised by Prof. Anna Delin, Prof. Erik Sjöqvist, and Prof. Olle Eriksson and collaborated within their joint group.
Since April 2025, Yuefei has been a postdoctoral researcher at Nordita (Sweden), working under the supervision of Prof. A. V. Balatsky on the interaction between Laguerre–Gaussian beams and magnetic systems. In March 2026, he joined the Center for Quantum Spintronics at NTNU (Norway) as a postdoctoral fellow in Sol Jacobsen’s group.