Paper Preparing quantum many-body scar states on quantum computers Erik J. Gustafson, Andy C. Y. Li, Abid Khan, Joonho Kim, Doga Murat Kurkcuoglu, M. Sohaib Alam, Peter P. Orth, Armin Rahmani, and Thomas Iadecola, Quantum 7, 1171 (2023). Quantum many-body scar states are highly excited eigenstates of many-body systems that exhibit atypical entanglement and correlation properties relative to typical eigenstates at the same en…
Paper Dissipative phase transitions in $n$-photon driven quantum nonlinear resonators Fabrizio Minganti, Vincenzo Savona, and Alberto Biella, Quantum 7, 1170 (2023). We investigate and characterize the emergence of finite-component dissipative phase transitions (DPTs) in nonlinear photon resonators subject to $n$-photon driving and dissipation. Exploiting…
Paper The quantum switch is uniquely defined by its action on unitary operations Qingxiuxiong Dong, Marco Túlio Quintino, Akihito Soeda, and Mio Murao, Quantum 7, 1169 (2023). The quantum switch is a quantum process that creates a coherent control between different unitary operations, which is often described as a quantum process which transforms a pair of unitary…
Paper Minimum Trotterization Formulas for a Time-Dependent Hamiltonian Tatsuhiko N. Ikeda, Asir Abrar, Isaac L. Chuang, and Sho Sugiura, Quantum 7, 1168 (2023). When a time propagator $e^{\delta t A}$ for duration $\delta t$ consists of two noncommuting parts $A=X+Y$, Trotterization approximately decomposes the propagator into a product of exponentials of…
Paper Quantum algorithm for ground state energy estimation using circuit depth with exponentially improved dependence on precision Guoming Wang, Daniel Stilck França, Ruizhe Zhang, Shuchen Zhu, and Peter D. Johnson, Quantum 7, 1167 (2023). A milestone in the field of quantum computing will be solving problems in quantum chemistry and materials faster than state-of-the-art classical methods. The current understanding is that ac…
Paper Covariant catalysis requires correlations and good quantum reference frames degrade little Lauritz van Luijk, Reinhard F. Werner, and Henrik Wilming, Quantum 7, 1166 (2023). Catalysts are quantum systems that open up dynamical pathways between quantum states which are otherwise inaccessible under a given set of operational restrictions while, at the same time, t…
Paper On low-depth algorithms for quantum phase estimation Hongkang Ni, Haoya Li, and Lexing Ying, Quantum 7, 1165 (2023). Quantum phase estimation is one of the critical building blocks of quantum computing. For early fault-tolerant quantum devices, it is desirable for a quantum phase estimation algorithm to (1…
Paper Fault-tolerant quantum computation of molecular observables Mark Steudtner, Sam Morley-Short, William Pol, Sukin Sim, Cristian L. Cortes, Matthias Loipersberger, Robert M. Parrish, Matthias Degroote, Nikolaj Moll, Raffaele Santagati, and Michael Streif, Quantum 7, 1164 (2023). Over the past three decades significant reductions have been made to the cost of estimating ground-state energies of molecular Hamiltonians with quantum computers. However, comparatively lit…
Paper Robust Extraction of Thermal Observables from State Sampling and Real-Time Dynamics on Quantum Computers Khaldoon Ghanem, Alexander Schuckert, and Henrik Dreyer, Quantum 7, 1163 (2023). Simulating properties of quantum materials is one of the most promising applications of quantum computation, both near- and long-term. While real-time dynamics can be straightforwardly imple…
Paper Operational meanings of a generalized conditional expectation in quantum metrology Mankei Tsang, Quantum 7, 1162 (2023). A unifying formalism of generalized conditional expectations (GCEs) for quantum mechanics has recently emerged, but its physical implications regarding the retrodiction of a quantum observab…
Paper Finite-time Landauer principle beyond weak coupling Alberto Rolandi and Martí Perarnau-Llobet, Quantum 7, 1161 (2023). Landauer's principle gives a fundamental limit to the thermodynamic cost of erasing information. Its saturation requires a reversible isothermal process, and hence infinite time. We develop…
Paper Integrable Quantum Circuits from the Star-Triangle Relation Yuan Miao and Eric Vernier, Quantum 7, 1160 (2023). The star-triangle relation plays an important role in the realm of exactly solvable models, offering exact results for classical two-dimensional statistical mechanical models. In this articl…
Paper Complete extension: the non-signaling analog of quantum purification Marek Winczewski, Tamoghna Das, John H. Selby, Karol Horodecki, Paweł Horodecki, Łukasz Pankowski, Marco Piani, and Ravishankar Ramanathan, Quantum 7, 1159 (2023). Deriving quantum mechanics from information-theoretic postulates is a recent research direction taken, in part, with the view of finding a beyond-quantum theory; once the postulates are clea…
Paper Completely Positive Map for Noisy Driven Quantum Systems Derived by Keldysh Expansion Ziwen Huang, Yunwei Lu, Anna Grassellino, Alexander Romanenko, Jens Koch, and Shaojiang Zhu, Quantum 7, 1158 (2023). Accurate modeling of decoherence errors in quantum processors is crucial for analyzing and improving gate fidelities. To increase the accuracy beyond that of the Lindblad dynamical map, seve…
Paper On tests of the quantum nature of gravitational interactions in presence of non-linear corrections to quantum mechanics Giovanni Spaventa, Ludovico Lami, and Martin B. Plenio, Quantum 7, 1157 (2023). When two particles interact primarily through gravity and follow the laws of quantum mechanics, the generation of entanglement is considered a hallmark of the quantum nature of the gravitati…
Paper A Pair Measurement Surface Code on Pentagons Craig Gidney, Quantum 7, 1156 (2023). In this paper, I present a way to compile the surface code into two-body parity measurements ("pair measurements"), where the pair measurements run along the edges of a Cairo pentagonal tili…
