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 […]
Quantum 8, 1304 (2024). https://doi.org/10.22331/q-2024-03-28-1304 Multipartite entangled states are an essential resource for sensing, quantum error correction, and cryptography. Color centers in solids are one of the leading platforms for quantum networking due to the […]
Quantum 8, 1303 (2024). https://doi.org/10.22331/q-2024-03-28-1303 We show that it is possible to perform Heisenberg-limited metrology on GHZ-like states, in the presence of generic spatially local, possibly strong interactions during the measurement process. An explicit protocol, […]
Quantum 8, 1302 (2024). https://doi.org/10.22331/q-2024-03-28-1302 We develop an architecture for measurement-based quantum computing using photonic quantum emitters. The architecture exploits spin-photon entanglement as resource states and standard Bell measurements of photons for fusing them into […]
Quantum 8, 1301 (2024). https://doi.org/10.22331/q-2024-03-28-1301 Boundaries of Walker-Wang models have been used to construct commuting projector models which realize chiral unitary modular tensor categories (UMTCs) as boundary excitations. Given a UMTC $mathcal{A}$ representing the Witt […]
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