Projects & Preprints

Projects

EU endeavor to build a full-stack quantum computer based on superconducting electronic circuits, with the capability, by 2026, to achieve entanglement of 100+ qubits. UTartu will contribute to the enabling-software stack.
03/2023–08/2026
ETIS: MLTAT23219R
Press announcement in Estonian: Eestikeelne pressiteade

Output of Quantum Computing research at the University of Tartu. This is updated very infrequently, sorry ☹️

arXiv:2207.01587 (Quantum)
“Proper” shift rules for derivatives of perturbed-parametric quantum evolutions
- Dirk Oliver Theis
- ➜ Source code: Notebook with numerical simulations comparing to literature method
- ➜ Patent application US 17/856,357
arXiv:2112.14669
Optimality of finite-support parameter shift rules for derivatives of variational quantum circuits
- Dirk Oliver Theis
- ➜ Source code: Proof-of-concept implementations
arXiv:2103.13319
Fast qubits of optical frequencies on the rare-earth ions in fluoride crystals and color centers in diamond
- Vladimir Hizhnyakov, Vadim Boltrushko, Aleksander Shelkan, Yurii Orlovskii
arXiv:2101.07792 (Optics Communications)
Rare earth ions doped mixed crystals for fast quantum computers with optical frequency qubits
- Vladimir Hizhnyakov, Vadim Boltrushko, Helle Kaasik, Yurii Orlovskii
arXiv:1903.12611
Information content of queries in training parameterized quantum circuits
- Bahman Ghandchi, Dirk Oliver Theis
arXiv:1901.11434 (Frontiers in Physics)
Input redundancy for parameterized quantum circuits
- Javier Gil Vidal, Dirk Oliver Theis
arXiv:1812.06323
Calculus on parameterized quantum circuits
- Javier Gil Vidal, Dirk Oliver Theis
arXiv:1810.10759
Note on (active-)QRAM-style data access as a quantum circuit
- Tore Vincent Carstens, Dirk Oliver Theis

Journal of Luminescence (2019)
Spectroscopic evidence of cooperative (entangled) quantum states of Nd3+ ion pairs in Nd3+: LaF3 crystal
- Yurii Orlovskii, Helge Gross, Elena Vinogradova, Vadim Boltrushko, Vladimir Hizhnyakov