Quantum 7, 948 (2023). https://doi.org/10.22331/q-2023-03-16-948 In the framework of ontological models, the inherently nonclassical features of quantum theory always seem to involve properties that are fine tuned, i.e. properties that hold at the operational level […]
Quantum 7, 947 (2023). https://doi.org/10.22331/q-2023-03-16-947 In the minimal scenario of quantum correlations, two parties can choose from two observables with two possible outcomes each. Probabilities are specified by four marginals and four correlations. The resulting […]
Quantum 7, 946 (2023). https://doi.org/10.22331/q-2023-03-13-946 Atomic clock interferometers are a valuable tool to test the interface between quantum theory and gravity, in particular via the measurement of gravitational time dilation in the quantum regime. Here, […]
Quantum 7, 945 (2023). https://doi.org/10.22331/q-2023-03-09-945 The quantum switch is a quantum computational primitive that provides computational advantage by applying operations in a superposition of orders. In particular, it can reduce the number of gate queries […]
Quantum 7, 944 (2023). https://doi.org/10.22331/q-2023-03-09-944 A proof of work (PoW) is an important cryptographic construct enabling a party to convince others that they invested some effort in solving a computational task. Arguably, its main impact […]
Quantum 7, 943 (2023). https://doi.org/10.22331/q-2023-03-09-943 We consider a nonlinearly coupled electromechanical system, and develop a quantitative theory for two-phonon cooling. In the presence of two-phonon cooling, the mechanical Hilbert space is effectively reduced to its […]
Quantum 7, 942 (2023). https://doi.org/10.22331/q-2023-03-09-942 Active quantum error correction is a central ingredient to achieve robust quantum processors. In this paper we investigate the potential of quantum machine learning for quantum error correction in a […]
Quantum 7, 941 (2023). https://doi.org/10.22331/q-2023-03-09-941 A simple scheme is presented for realizing robust optically controlled quantum gates for scalable atomic quantum processors by driving the qubits with optical standing waves. Atoms localized close to the […]
Quantum 7, 940 (2023). https://doi.org/10.22331/q-2023-03-09-940 Self-correcting quantum memories demonstrate robust properties that can be exploited to improve active quantum error-correction protocols. Here we propose a cellular automaton decoder for a variation of the color code […]
Quantum 7, 939 (2023). https://doi.org/10.22331/q-2023-03-06-939 Quantum capacity, as the key figure of merit for a given quantum channel, upper bounds the channel’s ability in transmitting quantum information. Identifying different types of channels, evaluating the corresponding […]
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