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 […]
Quantum 7, 938 (2023). https://doi.org/10.22331/q-2023-03-02-938 Neural Network Quantum States (NQS) represent quantum wavefunctions by artificial neural networks. Here we study the wavefunction access provided by NQS defined in [Science, 355, 6325, pp. 602-606 (2017)] and […]
Quantum 7, 937 (2023). https://doi.org/10.22331/q-2023-03-02-937 Amplitude estimation algorithms are based on Grover’s algorithm: alternating reflections about the input state and the desired outcome. But what if we are given the ability to perform arbitrary rotations, […]
Quantum 7, 936 (2023). https://doi.org/10.22331/q-2023-03-02-936 The ability to extract relevant information is critical to learning. An ingenious approach as such is the information bottleneck, an optimisation problem whose solution corresponds to a faithful and memory-efficient […]
Quantum 7, 935 (2023). https://doi.org/10.22331/q-2023-03-02-935 Graph states are a family of stabilizer states which can be tailored towards various applications in photonic quantum computing and quantum communication. In this paper, we present a modular design […]
Quantum 7, 934 (2023). https://doi.org/10.22331/q-2023-03-02-934 We propose a new method to extend the size of a quantum computation beyond the number of physical qubits available on a single device. This is accomplished by randomly inserting […]
Quantum 7, 933 (2023). https://doi.org/10.22331/q-2023-03-02-933 A fundamental computational problem is to find a shortest non-zero vector in Euclidean lattices, a problem known as the Shortest Vector Problem (SVP). This problem is believed to be hard […]
Quantum 7, 932 (2023). https://doi.org/10.22331/q-2023-03-02-932 Device-independent quantum key distribution (DI-QKD) is often seen as the ultimate key exchange protocol in terms of security, as it can be performed securely with uncharacterised black-box devices. The advent […]
Quantum 7, 931 (2023). https://doi.org/10.22331/q-2023-02-21-931 We introduce $Perceval$, an open-source software platform for simulating and interfacing with discrete-variable photonic quantum computers, and describe its main features and components. Its Python front-end allows photonic circuits to […]
Quantum 7, 930 (2023). https://doi.org/10.22331/q-2023-02-21-930 Local Hamiltonians of fermionic systems on a lattice can be mapped onto local qubit Hamiltonians. Maintaining the locality of the operators comes at the expense of increasing the Hilbert space […]
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