Quantum 7, 1106 (2023). https://doi.org/10.22331/q-2023-09-11-1106 We introduce distance measures between quantum states, measurements, and channels based on their statistical distinguishability in generic experiments. Specifically, we analyze the average Total Variation Distance (TVD) between output statistics […]
Quantum 7, 1105 (2023). https://doi.org/10.22331/q-2023-09-11-1105 We study the problem of testing identity of a collection of unknown quantum states given sample access to this collection, each state appearing with some known probability. We show that […]
Quantum 7, 1104 (2023). https://doi.org/10.22331/q-2023-09-07-1104 A powerful operational paradigm for distributed quantum information processing involves manipulating pre-shared entanglement by local operations and classical communication (LOCC). The LOCC round complexity of a given task describes how […]
Quantum 7, 1103 (2023). https://doi.org/10.22331/q-2023-09-07-1103 We show that the proof of the generalised quantum Stein’s lemma [Brandão & Plenio, Commun. Math. Phys. 295, 791 (2010)] is not correct due to a gap in the argument […]
Quantum 7, 1102 (2023). https://doi.org/10.22331/q-2023-09-07-1102 Integral representations of quantum relative entropy, and of the directional second and higher order derivatives of von Neumann entropy, are established, and used to give simple proofs of fundamental, known […]
Quantum 7, 1101 (2023). https://doi.org/10.22331/q-2023-09-07-1101 An orthogonal set of states in multipartite systems is called to be strong quantum nonlocality if it is locally irreducible under every bipartition of the subsystems [46]. In this work, […]
Quantum 7, 1100 (2023). https://doi.org/10.22331/q-2023-09-07-1100 The Zeno effect, in which repeated observation freezes the dynamics of a quantum system, stands as an iconic oddity of quantum mechanics. When a measurement is unable to distinguish between […]
Quantum 7, 1099 (2023). https://doi.org/10.22331/q-2023-08-31-1099 Spin-photon interfaces (SPIs) are key devices of quantum technologies, aimed at coherently transferring quantum information between spin qubits and propagating pulses of polarized light. We study the potential of a […]
Quantum 7, 1098 (2023). https://doi.org/10.22331/q-2023-08-29-1098 In standard quantum mechanics, reference frames are treated as abstract entities. We can think of them as idealized, infinite-mass subsystems which decouple from the rest of the system. In nature, […]
Quantum 7, 1097 (2023). https://doi.org/10.22331/q-2023-08-29-1097 Linear optical quantum circuits with photon number resolving (PNR) detectors are used for both Gaussian Boson Sampling (GBS) and for the preparation of non-Gaussian states such as Gottesman-Kitaev-Preskill (GKP), cat […]
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