Quantum 7, 1173 (2023). https://doi.org/10.22331/q-2023-11-07-1173 We consider the computational task of sampling a bit string $x$ from a distribution $pi(x)=|langle x|psirangle|^2$, where $psi$ is the unique ground state of a local Hamiltonian $H$. Our main […]
Quantum 7, 1172 (2023). https://doi.org/10.22331/q-2023-11-07-1172 The typical time-independent view of quantum error correction (QEC) codes hides significant freedom in the decomposition into circuits that are executable on hardware. Using the concept of detecting regions, we […]
Quantum 7, 1171 (2023). https://doi.org/10.22331/q-2023-11-07-1171 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 energy density. Scar states also […]
Quantum 7, 1170 (2023). https://doi.org/10.22331/q-2023-11-07-1170 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 a semiclassical approach, we derive general results […]
Quantum 7, 1169 (2023). https://doi.org/10.22331/q-2023-11-07-1169 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 […]
Quantum 7, 1168 (2023). https://doi.org/10.22331/q-2023-11-06-1168 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 $X$ and […]
Quantum 7, 1167 (2023). https://doi.org/10.22331/q-2023-11-06-1167 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 achieving quantum advantage […]
Quantum 7, 1166 (2023). https://doi.org/10.22331/q-2023-11-06-1166 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, they do […]
Quantum 7, 1165 (2023). https://doi.org/10.22331/q-2023-11-06-1165 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) use […]
Quantum 7, 1164 (2023). https://doi.org/10.22331/q-2023-11-06-1164 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 little attention has been paid […]
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