Quantum 8, 1313 (2024). https://doi.org/10.22331/q-2024-04-09-1313 Variational quantum algorithms (VQAs) represent a promising approach to utilizing current quantum computing infrastructures. VQAs are based on a parameterized quantum circuit optimized in a closed loop via a classical […]
Quantum 8, 1312 (2024). https://doi.org/10.22331/q-2024-04-09-1312 Several classes of quantum circuits have been shown to provide a quantum computational advantage under certain assumptions. The study of ever more restricted classes of quantum circuits capable of quantum […]
Quantum 8, 1311 (2024). https://doi.org/10.22331/q-2024-04-08-1311 We explore the possibility of adding complex absorbing potential at the boundaries when solving the one-dimensional real-time Schrödinger evolution on a grid using a quantum computer with a fully quantum […]
Quantum 8, 1310 (2024). https://doi.org/10.22331/q-2024-04-08-1310 In this paper, I cut the cost of Y basis measurement and initialization in the surface code by nearly an order of magnitude. Fusing twist defects diagonally across the surface […]
Quantum 8, 1309 (2024). https://doi.org/10.22331/q-2024-04-08-1309 Quantum span program algorithms for function evaluation sometimes have reduced query complexity when promised that the input has a certain structure. We design a modified span program algorithm to show […]
For quantum computers to go from research curiosities to practically useful devices, researchers need to get their errors under control. New research from Microsoft and Quantinuum has now taken a major step in that direction. […]
Quantum 8, 1308 (2024). https://doi.org/10.22331/q-2024-04-04-1308 Quantum walks have been used to develop quantum algorithms since their inception, and can be seen as an alternative to the usual circuit model; combining single-particle quantum walks on sparse […]
Quantum 8, 1307 (2024). https://doi.org/10.22331/q-2024-04-04-1307 Qudits with local dimension $d gt 2$ can have unique structure and uses that qubits ($d=2$) cannot. Qudit Pauli operators provide a very useful basis of the space of qudit […]
Quantum 8, 1306 (2024). https://doi.org/10.22331/q-2024-04-04-1306 Monte Carlo (MC) simulations are widely used in financial risk management, from estimating value-at-risk (VaR) to pricing over-the-counter derivatives. However, they come at a significant computational cost due to the […]
Quantum 8, 1305 (2024). https://doi.org/10.22331/q-2024-04-03-1305 Nanodevices exploiting quantum effects are critically important elements of future quantum technologies (QT), but their real-world performance is strongly limited by decoherence arising from local `environmental’ interactions. Compounding this, as […]
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