I am a physics PhD working as a postdoc in the Laboratory for Quantum Optics and Quantum Foundations at the Faculty of Mathematics and Physics, University of Ljubljana. There, we work with the team on various sources of entangled photons and on quantum communication protocols. Our current main project is SiQUID with the goal of building the first quantum network in Slovenia. I also work as a research associate at the Department of Theoretical Physics, Jožef Stefan Institute. Currently I am studying nonequilibrium interacting topological insulators with doc. Tomaž Rejec and doc. Jernej Mravlje. I have several works published with prof. Anton Ramšak on nonadiabatic quantum computing and quantum decoherence.

Nonequilibrium dynamics of topological insulators

L. Ulčakar

Advisor: doc. Tomaž Rejec, doc. Jernej Mravlje

PhD thesis, Faculty of Mathematics and Physics, University of Ljubljana, Slovenia (2020)

Stability of magic ratios of conductance through small graphene-like structures

L. Ulčakar

Advisor: prof. Anton Ramšak, doc. Tomaž Rejec

Masters thesis, Faculty of Mathematics and Physics, University of Ljubljana, Slovenia (2016)

Spin Hall conductivity in insulators with non-conserved spin

D. Monaco, L. Ulčakar

Kibble-Zurek behavior in disordered Chern insulators

L. Ulčakar, J. Mravlje, T. Rejec

Phys. Rev. Lett. 125, 216601 (2020), arXiv:2003.08439 (2020)

Thermal effects on a nonadiabatic spin-flip protocol of spin-orbit qubits

B. Donvil, L. Ulčakar, T. Rejec, A. Ramšak

Slow quenches in Chern insulator ribbons

L. Ulčakar, J. Mravlje, T. Rejec

On the resilience of magic number theory for conductance ratios of aromatic molecules

L. Ulčakar, T. Rejec, J. Kokalj, S. Sangtarash, H. Sadeghi, A. Ramšak, J. H. Jefferson and C. J. Lambert

Slow quenches in two-dimensional time-reversal symmetric Z2 topological insulators

L. Ulčakar, J. Mravlje, A. Ramšak and T. Rejec

Exact spin-orbit qubit manipulation

A. Ramšak, T. Čadež, A. Kregar and L. Ulčakar

Eur. Phys. J. Special Topics 227, 353–363 (2018), arXiv:1711.02134 (2017)

Effects of noise on fidelity in spin-orbit qubit transformations

L. Ulčakar and A. Ramšak

Int. J. Mod. Phys. B 32, 1840028 (2018), arXiv:1711.01459 (2017)

Exact analysis of gate noise effects on non-adiabatic transformations of spin-orbit qubits

L. Ulčakar and A. Ramšak

Linear conductances of gated graphene structures with selected connectivity

L. Ulčakar, T. Rejec and A. Ramšak