Paper Quantum Contextuality Mladen Pavicic, Quantum 7, 953 (2023). Quantum contextual sets have been recognized as resources for universal quantum computation, quantum steering and quantum communication. Therefore, we focus on engineering the sets that supp…
Paper Parity Quantum Optimization: Benchmarks Michael Fellner, Kilian Ender, Roeland ter Hoeven, and Wolfgang Lechner, Quantum 7, 952 (2023). We present benchmarks of the parity transformation for the Quantum Approximate Optimization Algorithm (QAOA). We analyse the gate resources required to implement a single QAOA cycle for real…
Paper Parity Quantum Optimization: Encoding Constraints Maike Drieb-Schön, Kilian Ender, Younes Javanmard, and Wolfgang Lechner, Quantum 7, 951 (2023). Constraints make hard optimization problems even harder to solve on quantum devices because they are implemented with large energy penalties and additional qubit overhead. The parity mapping…
Paper Parity Quantum Optimization: Compiler Kilian Ender, Roeland ter Hoeven, Benjamin E. Niehoff, Maike Drieb-Schön, and Wolfgang Lechner, Quantum 7, 950 (2023). 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…
Paper Latency considerations for stochastic optimizers in variational quantum algorithms Matt Menickelly, Yunsoo Ha, and Matthew Otten, Quantum 7, 949 (2023). 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…
Paper A mathematical framework for operational fine tunings Lorenzo Catani and Matthew Leifer, Quantum 7, 948 (2023). 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 operati…
Paper Quantum Correlations in the Minimal Scenario Thinh P. Le, Chiara Meroni, Bernd Sturmfels, Reinhard F. Werner, and Timo Ziegler, Quantum 7, 947 (2023). 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 correlati…
Paper Gravitational time dilation as a resource in quantum sensing Carlo Cepollaro, Flaminia Giacomini, and Matteo G.A. Paris, Quantum 7, 946 (2023). 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 reg…
Paper Practical computational advantage from the quantum switch on a generalized family of promise problems Jorge Escandón-Monardes, Aldo Delgado, and Stephen P. Walborn, Quantum 7, 945 (2023). 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…
Paper Quantum Multi-Solution Bernoulli Search with Applications to Bitcoin’s Post-Quantum Security Alexandru Cojocaru, Juan Garay, Aggelos Kiayias, Fang Song, and Petros Wallden, Quantum 7, 944 (2023). 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 ha…
Paper Quantum manipulation of a two-level mechanical system Salvatore Chiavazzo, Anders Søndberg Sørensen, Oleksandr Kyriienko, and Luca Dellantonio, Quantum 7, 943 (2023). 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 e…
Paper Quantum Error Correction with Quantum Autoencoders David F. Locher, Lorenzo Cardarelli, and Markus Müller, Quantum 7, 942 (2023). 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 correct…
Paper Robust phase-controlled gates for scalable atomic quantum processors using optical standing waves Shannon Whitlock, Quantum 7, 941 (2023). 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…
Paper A cellular automaton decoder for a noise-bias tailored color code Jonathan F. San Miguel, Dominic J. Williamson, and Benjamin J. Brown, Quantum 7, 940 (2023). 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…
Paper Information transmission with continuous variable quantum erasure channels Changchun Zhong, Changhun Oh, and Liang Jiang, Quantum 7, 939 (2023). 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, eva…
Paper Amplitude Ratios and Neural Network Quantum States Vojtech Havlicek, Quantum 7, 938 (2023). 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. 6…
