Results 31 to 40 of about 102,454 (262)
Distributional Property Testing in a Quantum World [PDF]
, 2020 A fundamental problem in statistics and learning theory is to test properties of distributions. We show that quantum computers can solve such problems with significant speed-ups.
, Li, Tongyang
core +2 more sources
Optimal frequency measurements with quantum probes
npj Quantum Information, 2021 Precise frequency measurements are important in applications ranging from navigation and imaging to computation and communication. Here we outline the optimal quantum strategies for frequency discrimination and estimation in the context of quantum ...
Simon Schmitt +9 more
doaj +1 more source
Remote State Design for Efficient Quantum Metrology with Separable and Non-Teleporting States
Quantum Reports, 2021 Measurements leading to the collapse of states and the non-local quantum correlations are the key to all applications of quantum mechanics as well as in the studies of quantum foundation.
Rahul Raj +2 more
doaj +1 more source
Quantum-assisted Monte Carlo algorithms for fermions [PDF]
Quantum, 2023 Quantum computing is a promising way to systematically solve the longstanding computational problem, the ground state of a many-body fermion system. Many efforts have been made to realise certain forms of quantum advantage in this problem, for instance ...
Xiaosi Xu, Ying Li
doaj +1 more source
Non-Boolean quantum amplitude amplification and quantum mean estimation
Quantum Information Processing, 2023 This paper generalizes the quantum amplitude amplification and amplitude estimation algorithms to work with non-boolean oracles. The action of a non-boolean oracle $U_φ$ on an eigenstate $|x\rangle$ is to apply a state-dependent phase-shift $φ(x)$. Unlike boolean oracles, the eigenvalues $\exp(iφ(x))$ of a non-boolean oracle are not restricted to be ...
openaire +3 more sources
General noise-resilient quantum amplitude estimation
, 2023 Quantum advantage requires overcoming noise-induced degradation of quantum systems. Conventional methods for reducing noise such as error mitigation face scalability issues in deep circuits. Specifically, noise hampers the extraction of amplitude and observable information from quantum systems.
Ding, Yonglong, Yang, Ruyu
openaire +2 more sources
On thermodynamic and quantum fluctuations of cosmological constant [PDF]
, 2004 We discuss from the condensed-matter point of view the recent idea that the Poisson fluctuations of cosmological constant about zero could be a source of the observed dark energy.
A. G. Riess +6 more
core +3 more sources
Quantum singular value transformation and beyond: exponential improvements for quantum matrix arithmetics [PDF]
, 2018 Quantum computing is powerful because unitary operators describing the time-evolution of a quantum system have exponential size in terms of the number of qubits present in the system.
Berry Dominic W. +11 more
core +3 more sources
Quantum integration of elementary particle processes
Physics Letters B, 2022 We apply quantum integration to elementary particle-physics processes. In particular, we look at scattering processes such as e+e−→qq¯ and e+e−→qq¯′W.
Gabriele Agliardi +3 more
doaj +1 more source
PRX Quantum, 2022 Under suitable assumptions, some recently developed quantum algorithms can estimate the ground-state energy and prepare the ground state of a quantum Hamiltonian with near-optimal query complexities. However, this is based on a block-encoding input model
Yulong Dong, Lin Lin, Yu Tong
doaj +1 more source