Quantum 5, 479 (2021). https://doi.org/10.22331/q-2021-06-17-479 There is an increasing interest in quantum algorithms for problems of integer programming and combinatorial optimization. Classical solvers for such problems employ relaxations, which replace binary variables with continuous ones, […]
Quantum 5, 478 (2021). https://doi.org/10.22331/q-2021-06-17-478 Quantum entanglement is a form of correlation between quantum particles that cannot be increased via local operations and classical communication. It has therefore been proposed that an increment of quantum […]
Quantum 5, 477 (2021). https://doi.org/10.22331/q-2021-06-17-477 In this paper, we introduce optimal versions of a multi-port based teleportation scheme allowing to send a large amount of quantum information. We fully characterise probabilistic and deterministic case by […]
Quantum 5, 476 (2021). https://doi.org/10.22331/q-2021-06-15-476 One of the basic distinctions between classical and quantum mechanics is the existence of fundamentally incompatible quantities. Such quantities are present on all levels of quantum objects: states, measurements, quantum […]
Quantum 5, 475 (2021). https://doi.org/10.22331/q-2021-06-15-475 A Physical Unclonable Function (PUF) is a device with unique behaviour that is hard to clone hence providing a secure fingerprint. A variety of PUF structures and PUF-based applications have […]
Quantum 5, 474 (2021). https://doi.org/10.22331/q-2021-06-10-474 At the dawn of Quantum Physics, Wigner and Weisskopf obtained a full analytical description (a $textit{photon portrait}$) of the emission of a single photon by a two-level system, using the […]
Quantum 5, 473 (2021). https://doi.org/10.22331/q-2021-06-10-473 Recently a new class of quantum algorithms that are based on the quantum computation of the connected moment expansion has been reported to find the ground and excited state energies. […]
Quantum 5, 472 (2021). https://doi.org/10.22331/q-2021-06-10-472 This work analyzes correlations arising from quantum systems subject to sequential projective measurements to certify that the system in question has a quantum dimension greater than some $d$. We refine […]
Quantum 5, 471 (2021). https://doi.org/10.22331/q-2021-06-08-471 Negativity of the Wigner function is arguably one of the most striking non-classical features of quantum states. Beyond its fundamental relevance, it is also a necessary resource for quantum speedup […]
Quantum 5, 470 (2021). https://doi.org/10.22331/q-2021-06-08-470 Recently, it was shown that when reference frames are associated to quantum systems, the transformation laws between such quantum reference frames need to be modified to take into account the […]
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