International Conference on Natural Computation (ICNC)

Quantum Complexity of the Approximation on the Classes B(Wrp([0, 1]d)) and B(Hrp([0, 1]d))

Peixin Ye

Published Jan 1, 2008• 0 citations

Abstract

The optimal order of complexity of the approximation of the imbedding from anisotropic Sobolev classes B(Wpr([0, 1]d)) and Holder Nikolskii classes B(Hpr([0, 1]d)) into the Lq([0, 1]d) with q les p quantum computation model is obtained up to logarithmic factors. It shows that the quantum algorithms are not significantly better than the classical ones for this type of problems.

DOI: 10.1109/icnc.2008.221

Related papers

Quantum Approximation Error on Some Sobolev Classes

Peixin Ye

We study the approximation of functions from anisotropic and generalized Sobolev classes under Lq([0, 1]d) norm in the quantum model of computation. Based on the quantum algorithm for approximation of finite imbedding from LNPto LiNQ, we develop a quantum algorithm for approximating the imbedding from anisotropic Sobolev classes B(Wpr(|0, 1|d)) to Lq(|0, 1|d) space for all 1 les q,p les infin and prove their optimality. Our results show that for p < q the quantum model of computation can bring a speedup of roughly squaring the rate of classical deterministic and randomized settings.

International Conference on Natural Computation (ICNC)Jan 1, 20070 citations

Sobolev Approximation in the Quantum Computation Model

Peixin Ye, Yuan Xiuhua

Using a new and elegant reduction approach we derive a lower bound of quantum complexity for the approximation of imbeddings from anisotropic Sobolev classes B(Wpr([0,1]d)) to anisotropic Sobolev space (Wps([0,1]d) for all 1 ≥ p, q ≤ ∞ . When p≥q we show this bound is optimal by deriving the matching upper bound. In this case the quantum algorithms are not significantly better than the classical deterministic or randomized algorithms.

International Conference on Intelligent Computation Technology and AutomationMar 1, 20110 citations

Quantum Approximation on Some Classes of Multivarite Functions

Peixin Ye

We study the quantum query error of approximation of functions from anisotropic Sobolev class B(Wpr([0, 1]d)) and Holder-Nikolskii class B(Hpr([0, 1]d)) in the Lq([0, 1]d) norm for all 1 les p, q les infin. The results show that for the class B(Wpr([0, 1]d)) (r isin Nd) when ppr([0, 1]d)) and B(Wpr([0, 1]d)) (r isin R+d) when p ges q the optimal convergence rate is the same for all three settings.

Jan 1, 20080 citations

Complexity for the approximation of Sobolev imbeddings in the quantum computation model

Jingfan Long, Peixin Ye, Xiuhua Yuan

Using a new and elegant reduction approach we derive a lower bound of quantum complexity for the approximation of imbeddings from anisotropic Sobolev classes B(W p r([0, 1]d)) to anisotropic Sobolev space W p s([0, 1]d) for all 1 ≤ p, q ≤ ∞. When p ≥ q this bound is optimal. In this case the quantum algorithms are not significantly better than the classical deterministic or randomized algorithms. When p ≥ q we conjecture that quantum algorithms bring speed-up over the classical deterministic and randomized ones. This conjecture was confirmed in the situation s = 0.

Chinese Control Conference (CCC)Jan 1, 20110 citations

QUANTUM COMPLEXITY OF THE INTEGRATION PROBLEM FOR ANISOTROPIC CLASSES

Xiao-feiHu, Pei-xinYe

We obtain the optimal order of high-dimensional integration complexity in the quantumcomputation model in anisotropic Sobolev classes W∞^r ([0, 1]^d) and Hǒlder Nikolskii classes H∞^r([0, 1]^d). It is proved that for these classes of functions there is a speed-up of quantum algorithms over deterministic classical algorithms due to factor n^-1 and over randomized classical methods due to factor n^-1/2. Moreover, we give an estimation for optimal query complexity in the class H∞^∧ (D) whose smoothness index is the boundary of some complete set in Z+^d.

Journal of Computational MathematicsJan 1, 20057 citations

Lower Bound for Quantum Integration Error on Some Sobolev Classes

Peixin Ye

We study the approximation of the integration of multivariate functions in the quantum model of computation. Using a new reduction approach we obtain a lower bound of the n-th minimal query error on anisotropic Sobolev classes B(Wpr([0, 1]d)), (r isin R+d). Then combining our previous results we determine the optimal bound of nth minimal query error for anisotropic Holder-Nikolskii class B(Hinfinr([0, 1]d)), (r isin R+d) and Sobolev class B(Wpr([0, 1]d)) (r isin Nd). The results show the quantum algorithms give speed up over classical algorithms.

International Conference on Natural Computation (ICNC)Jan 1, 20080 citations