Foundations of quantum interference and quantum communication

We investigate single-particle interference phenomena for quantum information processing. Unlike the standard approach, which explores quantum entanglement as the primary resource for genuine quantum advantage, we have shown that quantum interference (of a single quantum particle) can be a resource to devise genuine protocols that outperform the classical counterparts. By exploring spatial superpositions of quantum particles, we have developed new communication and computation protocols [IC1-IC7], such as two-way communication with a single quantum particle [IC1], a protocol for quantum enhancement to information acquisition speed [IC3], and universal quantum computing by quantum-controlled classical operations [IC7].

References

[IC1] Two-way communication with a single quantum particle, F. del Santo and B. Dakić, Physical Review Letters 120, 060503 (2018), https://doi.org/10.1103/PhysRevLett.120.060503.

[IC2] Interference as an information-theoretic game, S. Horvat and B. Dakić, Quantum 5, 404 (2021), https://doi.org/10.22331/q-2021-03-08-404.

[IC3] Quantum enhancement to information speed acquisition, S. Horvat and B. Dakić, New Journal of Physics 23, 033008 (2021), https://doi.org/10.1088/1367-2630/abe9d4.

[IC4] Coherence Equality and Communication in Quantum Superposition, F. Del Santo and B. Dakić, Physical Review Letters 124, 190501 (2020), https://doi.org/10.1103/PhysRevLett.124.190501.

[IC5] Experimental two-way communication with one photon, F. Massa, A. Moqanaki, F. Del Santo, J. A. Kettlewell, B. Dakić, and P. Walther, Advanced Quantum Technologies 2, 1900050 2019, https://doi.org/10.1002/qute.201900050.

[IC6] Accessing inaccessible information via quantum indistinguishability, S. Horvat and B. Dakić, New Journal of Physics 25, 113008 (2023), https://doi.org/10.48550/arXiv.2203.16592.

[IC7] Universal quantum computation via quantum controlled classical operations, S. Horvat, X. G. Gao, and B. Dakić, Journal of Physics A: Mathematical and Theoretical 55, 075301 (2022), https://doi.org/10.1088/1751-8121/ac4393.