DESCOM VEGA 2/0183/21

Title: Design of complex quantum measurements
Duration: 01/01/2021 - 31/12/2024
Principal Investigator: Dr. Mario Ziman

Project Goals: Many aspects of quantum measurements are conceptually puzzling. However, their practical implementation is of interest for current development of quantum technologies. Interestingly, it is also a theoretical challenge to develop novel tools and efficiently design desired quantum measurements. The canonical implementations are often very complex and possible only in theory. The goal of this project is to investigate and design measurements in three different conceptual frameworks - system of cloud universal quantum computers, thermodynamic machines, and superconducting qubits. We will develop novel simulations of existing physical systems to learn about their ability to accomplish the considered quantum measurements. As a result, we expect realistic proposals for new quantum measuring apparatuses, tools for implementing complex quantum observables efficiently also on existing quantum infrastructures, and specification of certifiable requirements that such infrastructure should meet.

Publications:

1. Saubhik Sarkar, Chiranjib Mukhopadhyay, Abhijeet Alase, Abolfazl Bayat:
   Free-Fermionic Topological Quantum Sensors | pdf |
   Phys. Rev. Lett. 129, 090503 (2022) [arXiv:2201.07102]
2. David Davalos, Mário Ziman:
   Quantum dynamics is not strictly bidivisible | pdf |
   Phys. Rev. Lett. 130, 080801 (2023) [arXiv:2203.13451]
3. Simon Reinhardt, Tim Ascherl, Andreas Costa, Johanna Berger, Sergei Gronin, Geoffrey C. Gardner, Tyler Lindemann, Michael J. Manfra, Jaroslav Fabian, Denis Kochan, Christoph Strunk, Nicola Paradiso:
   Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry | pdf |
   Nature Communications 15, 4413 (2024) [arXiv:2308.01061]
4. Leevi Leppäjärvi, Ion Nechita, Ritabrata Sengupta:
   Generating random Gaussian states | pdf |
   J. Math. Phys. 65, 082201 (2024), https://doi.org/10.1063/5.0211479 [arXiv:2401.13435]
5. Sanuja D. Mohanty, Ram N. Patro, Pradyut K. Biswal, Biswajit Pradhan, Sk Sazim:
   Trade-off between Bagging and Boosting for quantum separability-entanglement classification | pdf |
   Quantum Information Processing 23, 273 (2024) [arXiv:2401.12041]
6. Teiko Heinosaari, Leevi Leppäjärvi, Martin Plávala,:
   Encoding and decoding of information in general probabilistic theories | pdf |
   Int. J. Quantum Inf. 2440007 (2024), https://doi.org/10.1142/S0219749924400070 [arXiv:2311.17522]
7. Jan Bouda, Daniel Reitzner:
   General Measurements with Limited Resources and Their Application to Quantum Unambiguous State Discrimination | pdf |
   Quantum Information Processing 23, 268 (2024) [arXiv:2009.05276]
8. Isadora Veeren, Martin Plávala, Leevi Leppäjärvi, Roope Uola:
   Semi-device-independent certification of number of measurements | pdf |
   Phys. Rev. A 109, 062203 (2024) [arXiv:2307.13737]
9. Nidhin Sudarsanan Ragini and Mário Ziman:
   Single-shot labeling of quantum observables | pdf |
   Phys. Rev. A 109, 052415 (2024)
10. Teiko Heinosaari, Oskari Kerppo, Leevi Leppäjärvi, Martin Plávala:
    Simple Information Processing Tasks with Unbounded Quantum Advantage | pdf |
    Phys. Rev. A 109, 032627 (2024) [arXiv:2308.07727]
11. Gautam Sharma, Sibasish Ghosh and Sk Sazim:
    Bloch sphere analog of qudits using Heisenberg-Weyl Operators | pdf |
    Physica Scripta 99, 045105 (2024) [arXiv:2101.06408]
12. Giovanni Scala, Seyed Arash Ghoreishi, and Marcin Pawłowski:
    Advantages of quantum communication revealed by the reexamination of hyperbit theory limitations | pdf |
    Phys. Rev. A 109, 022230 (2024) [arXiv:2308.16114]
13. Natália S. Móller, Bruna Sahdo, Nelson Yokomizo:
    Gravitational quantum switch on a superposition of spherical shells | pdf |
    Quantum 8, 1248 (2024) [arXiv:2306.10984]
14. Leevi Leppäjärvi, Michal Sedlák:
    Incompatibility of quantum instruments | pdf |
    Quantum 8, 1246 (2024) [arXiv:2212.11225]
15. Mahdi Rouhbakhsh N., Seyed Arash Ghoreishi:
    Minimum error discrimination of qubit states revisited | pdf |
    Quantum Inf. Process 22, 323 (2023) [arXiv:2108.12299]
16. Jaroslav Pavličko, Mário Ziman:
    Robustness of optimal probabilistic storage and retrieval of unitary channels to noise | pdf |
    Phys. Rev. A 106, 052416 (2022)[arXiv:2211.07079]
17. Mohd Asad Siddiqui, Sk Sazim:
    Mermin and Svetlichny inequalities for non-projective measurement observables | pdf |
    J. Phys. A: Math. Theor. 55 465301 (2022) [arXiv:2203.07103]
18. Jose Alfredo de Leon, Alejandro Fonseca, Francois Leyvraz, David Davalos, Carlos Pineda:
    Pauli component erasing operations | pdf |
    Phys. Rev. A 106, 042604 (2022) [arXiv:2205.05808]
19. Teiko Heinosaari, Leevi Leppäjärvi:
    Random access test as an identifier of nonclassicality | pdf |
    J. Phys. A: Math. Theor. 55, 174003 (2022) [arXiv:2112.03781]