Quantum 7, 1176 (2023). https://doi.org/10.22331/q-2023-11-08-1176 The increasing capabilities of quantum computing hardware and the challenge of realizing deep quantum circuits require fully automated and efficient tools for compiling quantum circuits. To express arbitrary circuits in […]
Quantum 7, 1175 (2023). https://doi.org/10.22331/q-2023-11-08-1175 A promising approach for scaling-up trapped-ion quantum computer platforms is by storing multiple trapped-ion qubit sets (‘ion crystals’) in segmented microchip traps and to interconnect these via physical movement of […]
Quantum 7, 1174 (2023). https://doi.org/10.22331/q-2023-11-08-1174 At the interface of machine learning and quantum computing, an important question is what distributions can be learned provably with optimal sample complexities and with quantum-accelerated time complexities. In the […]
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 […]
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