Quantum 7, 903 (2023). https://doi.org/10.22331/q-2023-01-19-903 Qubit memory that is entangled with photonic qubit is the building block for long distance quantum repeaters. Cavity enhanced and long lived spin wave photon entanglement has been demonstrated by […]
Quantum 7, 902 (2023). https://doi.org/10.22331/q-2023-01-19-902 We introduce a new set of quantum channels: resonant multilevel amplitude damping (ReMAD) channels. Among other instances, they can describe energy dissipation effects in multilevel atomic systems induced by the […]
Quantum 7, 901 (2023). https://doi.org/10.22331/q-2023-01-19-901 The fisherman caught a quantum fish. “Fisherman, please let me go”, begged the fish, “and I will grant you three wishes”. The fisherman agreed. The fish gave the fisherman a […]
Quantum 7, 900 (2023). https://doi.org/10.22331/q-2023-01-19-900 The Kochen–Specker (KS) theorem reveals the nonclassicality of single quantum systems. In contrast, Bell’s theorem and entanglement concern the nonclassicality of composite quantum systems. Accordingly, unlike incompatibility, entanglement and Bell […]
Quantum 7, 899 (2023). https://doi.org/10.22331/q-2023-01-19-899 The variational quantum-classical algorithms are the most promising approach for achieving quantum advantage on near-term quantum simulators. Among these methods, the variational quantum eigensolver has attracted a lot of attention […]
Quantum 7, 898 (2023). https://doi.org/10.22331/q-2023-01-19-898 In this work, we introduce multipartite intrinsic non-locality as a method for quantifying resources in the multipartite scenario of device-independent (DI) conference key agreement. We prove that multipartite intrinsic non-locality […]
Quantum 7, 897 (2023). https://doi.org/10.22331/q-2023-01-13-897 Discarding undesirable measurement results in Bell experiments opens the detection loophole that prevents a conclusive demonstration of nonlocality. As closing the detection loophole represents a major technical challenge for many […]
Quantum 7, 896 (2023). https://doi.org/10.22331/q-2023-01-13-896 Quantum algorithms designed for realistic quantum many-body systems, such as chemistry and materials, usually require a large number of measurements of the Hamiltonian. Exploiting different ideas, such as importance sampling, […]
Quantum 7, 895 (2023). https://doi.org/10.22331/q-2023-01-13-895 We propose a protocol to encode classical bits in the measurement statistics of many-body Pauli observables, leveraging quantum correlations for a random access code. Measurement contexts built with these observables […]
Quantum 7, 894 (2023). https://doi.org/10.22331/q-2023-01-13-894 This paper proposes and proves security of a QKD protocol which uses two-universal hashing instead of random sampling to estimate the number of bit flip and phase flip errors. This […]
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