Quantum 7, 950 (2023). https://doi.org/10.22331/q-2023-03-17-950 We introduce parity quantum optimization with the aim of solving optimization problems consisting of arbitrary $k$-body interactions and side conditions using planar quantum chip architectures. The method introduces a decomposition […]
Quantum 7, 949 (2023). https://doi.org/10.22331/q-2023-03-16-949 Variational quantum algorithms, which have risen to prominence in the noisy intermediate-scale quantum setting, require the implementation of a stochastic optimizer on classical hardware. To date, most research has employed […]
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 […]
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