Perspective Towards real-world implementations of quantum machine learning Junyu Liu, Quantum Views 7, 77 (2023). Quantum machine learning, which involves algorithms akin to machine learning operating on quantum devices, is anticipated to be a flagship application for quantum technologies. In the short…
Paper Quantum Deep Hedging El Amine Cherrat, Snehal Raj, Iordanis Kerenidis, Abhishek Shekhar, Ben Wood, Jon Dee, Shouvanik Chakrabarti, Richard Chen, Dylan Herman, Shaohan Hu, Pierre Minssen, Ruslan Shaydulin, Yue Sun, Romina Yalovetzky, and Marco Pistoia, Quantum 7, 1191 (2023). Quantum machine learning has the potential for a transformative impact across industry sectors and in particular in finance. In our work we look at the problem of hedging where deep reinforc…
Paper Energy measurements remain thermometrically optimal beyond weak coupling Jonas Glatthard, Karen V. Hovhannisyan, Martí Perarnau-Llobet, Luis A. Correa, and Harry J. D. Miller, Quantum 7, 1190 (2023). We develop a general perturbative theory of finite-coupling quantum thermometry up to second order in probe-sample interaction. By assumption, the probe and sample are in thermal equilibrium…
Paper Efficient classical algorithms for simulating symmetric quantum systems Eric R. Anschuetz, Andreas Bauer, Bobak T. Kiani, and Seth Lloyd, Quantum 7, 1189 (2023). In light of recently proposed quantum algorithms that incorporate symmetries in the hope of quantum advantage, we show that with symmetries that are restrictive enough, classical algorithms…
Paper Variational Quantum Linear Solver Carlos Bravo-Prieto, Ryan LaRose, M. Cerezo, Yigit Subasi, Lukasz Cincio, and Patrick J. Coles, Quantum 7, 1188 (2023). Previously proposed quantum algorithms for solving linear systems of equations cannot be implemented in the near term due to the required circuit depth. Here, we propose a hybrid quantum-cla…
Paper Solve single photon detector problems Hao Shu, Quantum 7, 1187 (2023). Single photon detector(SPD) problems arise in most quantum tasks, especially for measuring states going through high-lost channels. They are particularly prominent in quantum key distributio…
Paper NISQ-compatible approximate quantum algorithm for unconstrained and constrained discrete optimization M. R. Perelshtein, A. I. Pakhomchik, Ar. A. Melnikov, M. Podobrii, A. Termanova, I. Kreidich, B. Nuriev, S. Iudin, C. W. Mansell, and V. M. Vinokur, Quantum 7, 1186 (2023). Quantum algorithms are getting extremely popular due to their potential to significantly outperform classical algorithms. Yet, applying quantum algorithms to optimization problems meets chal…
Paper Abstraqt: Analysis of Quantum Circuits via Abstract Stabilizer Simulation Benjamin Bichsel, Anouk Paradis, Maximilian Baader, and Martin Vechev, Quantum 7, 1185 (2023). Stabilizer simulation can efficiently simulate an important class of quantum circuits consisting exclusively of Clifford gates. However, all existing extensions of this simulation to arbitra…
Paper Synergetic quantum error mitigation by randomized compiling and zero-noise extrapolation for the variational quantum eigensolver Tomochika Kurita, Hammam Qassim, Masatoshi Ishii, Hirotaka Oshima, Shintaro Sato, and Joseph Emerson, Quantum 7, 1184 (2023). We propose a quantum error mitigation strategy for the variational quantum eigensolver (VQE) algorithm. We find, via numerical simulation, that very small amounts of coherent noise in VQE ca…
Paper Actis: A Strictly Local Union–Find Decoder Tim Chan and Simon C. Benjamin, Quantum 7, 1183 (2023). Fault-tolerant quantum computing requires classical hardware to perform the decoding necessary for error correction. The Union–Find decoder is one of the best candidates for this. It has rem…
Paper Bounding the Minimum Time of a Quantum Measurement Nathan Shettell, Federico Centrone, and Luis Pedro García-Pintos, Quantum 7, 1182 (2023). Measurements take a singular role in quantum theory. While they are often idealized as an instantaneous process, this is in conflict with all other physical processes in nature. In this Lett…
Paper Composite Quantum Simulations Matthew Hagan and Nathan Wiebe, Quantum 7, 1181 (2023). In this paper we provide a framework for combining multiple quantum simulation methods, such as Trotter-Suzuki formulas and QDrift into a single Composite channel that builds upon older coal…
Paper An Improved Approximation Algorithm for Quantum Max-Cut on Triangle-Free Graphs Robbie King, Quantum 7, 1180 (2023). We give an approximation algorithm for Quantum Max-Cut which works by rounding an SDP relaxation to an entangled quantum state. The SDP is used to choose the parameters of a variational quan…
Paper A relativistic discrete spacetime formulation of 3+1 QED Nathanaël Eon, Giuseppe Di Molfetta, Giuseppe Magnifico, and Pablo Arrighi, Quantum 7, 1179 (2023). This work provides a relativistic, digital quantum simulation scheme for both $2+1$ and $3+1$ dimensional quantum electrodynamics (QED), based on a discrete spacetime formulation of theory. It t…
Paper Tamper Detection against Unitary Operators Naresh Goud Boddu and Upendra Kapshikar, Quantum 7, 1178 (2023). Security of a storage device against a tampering adversary has been a well-studied topic in classical cryptography. Such models give black-box access to an adversary, and the aim is to prote…
Paper Enhanced Gravitational Entanglement via Modulated Optomechanics A. Douglas K. Plato, Dennis Rätzel, and Chuanqi Wan, Quantum 7, 1177 (2023). The role of entanglement in determining the non-classicality of a given interaction has gained significant traction over the last few years. In particular, as the basis for new experimental…
