Quantum 6, 773 (2022). https://doi.org/10.22331/q-2022-08-04-773 Quantum state preparation is an important ingredient for other higher-level quantum algorithms, such as Hamiltonian simulation, or for loading distributions into a quantum device to be used e.g. in the […]
Quantum 6, 772 (2022). https://doi.org/10.22331/q-2022-08-04-772 We provide a stochastic interpretation of non-commutative Dirichlet forms in the context of quantum filtering. For stochastic processes motivated by quantum optics experiments, we derive an optimal finite time deviation […]
There is a magical, predictable, frustrating, unavoidable pattern that we observe every year at Quantum, and can be found anywhere where research papers are submitted. Twice per year, in late July and early December, authors […]
Quantum 6, 771 (2022). https://doi.org/10.22331/q-2022-07-22-771 Detection-efficiency mismatch is a common problem in practical quantum key distribution (QKD) systems. Current security proofs of QKD with detection-efficiency mismatch rely either on the assumption of the single-photon light […]
Quantum 6, 770 (2022). https://doi.org/10.22331/q-2022-07-20-770 We introduce a quantum algorithm to compute the market risk of financial derivatives. Previous work has shown that quantum amplitude estimation can accelerate derivative pricing quadratically in the target error […]
Quantum 6, 769 (2022). https://doi.org/10.22331/q-2022-07-20-769 We present an algorithm to reliably generate various quantum states critical to quantum error correction and universal continuous-variable (CV) quantum computing, such as Schrödinger cat states and Gottesman-Kitaev-Preskill (GKP) grid […]
Quantum 6, 768 (2022). https://doi.org/10.22331/q-2022-07-20-768 Quantum Phase Estimation is one of the most useful quantum computing algorithms for quantum chemistry and as such, significant effort has been devoted to designing efficient implementations. In this article, […]
Quantum 6, 767 (2022). https://doi.org/10.22331/q-2022-07-20-767 Quantum error correction has recently been shown to benefit greatly from specific physical encodings of the code qubits. In particular, several researchers have considered the individual code qubits being encoded […]
Quantum 6, 766 (2022). https://doi.org/10.22331/q-2022-07-14-766 We study a three-fold variant of the hypergraph product code construction, differing from the standard homological product of three classical codes. When instantiated with 3 classical LDPC codes, this “XYZ […]
Quantum 6, 765 (2022). https://doi.org/10.22331/q-2022-07-14-765 It is well-known that in a Bell experiment, the observed correlation between measurement outcomes – as predicted by quantum theory – can be stronger than that allowed by local causality, […]
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