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of 281
pro vyhledávání: '"Barnes, Crispin"'
We present a quantum algorithm for portfolio optimisation. Specifically, We present an end-to-end quantum approximate optimisation algorithm (QAOA) to solve the discrete global minimum variance portfolio (DGMVP) model. This model finds a portfolio of
Externí odkaz:
http://arxiv.org/abs/2410.16265
Autor:
Long, Christopher K., Mayhall, Nicholas J., Economou, Sophia E., Barnes, Edwin, Barnes, Crispin H. W., Martins, Frederico, Arvidsson-Shukur, David R. M., Mertig, Normann
Standing as one of the most significant barriers to reaching quantum advantage, state-preparation fidelities on noisy intermediate-scale quantum processors suffer from quantum-gate errors, which accumulate over time. A potential remedy is pulse-based
Externí odkaz:
http://arxiv.org/abs/2406.10913
We study how to use the surface states in a Bi$_{2}$Se$_{3}$ topological insulator ultra-thin film that are affected by finite size effects for the purpose of quantum computing. We demonstrate that: (i) surface states under the finite size effect can
Externí odkaz:
http://arxiv.org/abs/2311.05166
Autor:
Long, Christopher K., Dalton, Kieran, Barnes, Crispin H. W., Arvidsson-Shukur, David R. M., Mertig, Normann
Adaptive variational quantum eigensolvers (ADAPT-VQEs) are promising candidates for simulations of strongly correlated systems on near-term quantum hardware. To further improve the noise resilience of these algorithms, recent efforts have been direct
Externí odkaz:
http://arxiv.org/abs/2308.11708
In quantum metrology, information about unknown parameters $\mathbf{\theta} = (\theta_1,\ldots,\theta_M)$ is accessed by measuring probe states $\hat{\rho}_{\mathbf{\theta}}$. In experimental settings where copies of $\hat{\rho}_{\mathbf{\theta}}$ ca
Externí odkaz:
http://arxiv.org/abs/2307.08648
We present a numerically-optimized multipulse framework for the quantum control of a single-electron charge qubit. Our framework defines a set of pulse sequences, necessary for the manipulation of the ideal qubit basis, that avoids errors associated
Externí odkaz:
http://arxiv.org/abs/2303.04823
Quantum-phase-estimation algorithms are critical subroutines in many applications for quantum computers and in quantum-metrology protocols. These algorithms estimate the unknown strength of a unitary evolution. By using coherence or entanglement to s
Externí odkaz:
http://arxiv.org/abs/2303.01517
Autor:
Dalton, Kieran, Long, Christopher K., Yordanov, Yordan S., Smith, Charles G., Barnes, Crispin H. W., Mertig, Normann, Arvidsson-Shukur, David R. M.
Publikováno v:
npj Quantum Inf 10, 18 (2024)
Variational quantum eigensolvers (VQEs) are leading candidates to demonstrate near-term quantum advantage. Here, we conduct density-matrix simulations of leading gate-based VQEs for a range of molecules. We numerically quantify their level of tolerab
Externí odkaz:
http://arxiv.org/abs/2211.04505
Given $N_{\textrm{tot}}$ applications of a unitary operation with an unknown phase $\theta$, a large-scale fault-tolerant quantum system can {reduce} an estimate's {error} scaling from $\mathcal{O} \left[ 1 / \sqrt{N_{\textrm{tot}}} \right]$ to $\mat
Externí odkaz:
http://arxiv.org/abs/2206.06392
Autor:
Valladares, Luis De Los Santos, Vargas-Luque, Arquimedes, Borja-Castro, Luis, Valencia-Bedregal, Renato, de Jesús Velazquez-Garcia, José, Barnes, Eustace Peregrine, Dominguez, Angel Bustamante, Byrne, Patrick, Kollu, Pratap, Rodriguez Martínez, Marco, Coaquira, Jose Antonio, Barnes, Crispin Henry William
Publikováno v:
In International Journal of Sediment Research June 2024 39(3):478-494
