When Google announced its quantum computer had solved a problem beyond the capability of the most powerful supercomputer, it was a landmark for the industry. But Chinese researchers have now shown they can solve the […]
Category: singularityhub
Quantum 6, 775 (2022). https://doi.org/10.22331/q-2022-08-11-775 The task of determining whether a given quantum channel has positive capacity to transmit quantum information is a fundamental open problem in quantum information theory. In general, the coherent information […]
Quantum 6, 774 (2022). https://doi.org/10.22331/q-2022-08-11-774 We introduce Mitiq, a Python package for error mitigation on noisy quantum computers. Error mitigation techniques can reduce the impact of noise on near-term quantum computers with minimal overhead in […]
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 […]
Researchers have been trying to build artificial synapses for years in the hope of getting close to the unrivaled computational performance of the human brain. A new approach has now managed to design ones that […]
Security of quantum key distribution with detection-efficiency mismatch in the multiphoton case0 (0)
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 […]
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