Quantum method of projection

1996 ◽  
Vol 39 (9) ◽  
pp. 893-897
Author(s):  
I. V. Shirokov ◽  
A. A. Drokin
Keyword(s):  
Quantum Method

scholarly journals A nuclear spin and spatial symmetry-adapted full quantum method for light particles inside carbon nanotubes: clusters of 3He, 4He, and para-H2

2021 ◽  
Author(s):  
María Pilar de Lara-Castells ◽  
Alexander O. Mitrushchenkov
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Nuclear Spin ◽  
Spatial Symmetry ◽  
Quantum Method ◽  
Light Particles ◽  
Full Quantum

A new nuclear spin and spatial symmetry-adapted full quantum method for light fermionic and bosonic particles under cylindrical carbon nanotube confinement.

Quantum algorithm for MUSIC-based DOA estimation in hybrid MIMO systems

2021 ◽  
Author(s):  
Fan-Xu Meng ◽  
Ze-Tong Li ◽  
Xutao Yu ◽  
Zaichen Zhang
Keyword(s):  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Quantum Algorithm ◽  
Doa Estimation ◽  
Quantum Circuit ◽  
Music Algorithm ◽  
Quantum Method ◽  
Sample Covariance ◽  
Input Multiple Output ◽  
Eigen Decomposition

Abstract The multiple signal classification (MUSIC) algorithm is a well-established method to evaluate the direction of arrival (DOA) of signals. However, the construction and eigen-decomposition of the sample covariance matrix (SCM) are computationally costly for MUSIC in hybrid multiple input multiple output (MIMO) systems, which limits the application and advancement of the algorithm. In this paper, we present a novel quantum method for MUSIC in hybrid MIMO systems. Our scheme makes the following three contributions. First, the quantum subroutine for constructing the approximate SCM is designed, along with the quantum circuit for the steering vector and a proposal for quantum singular vector transformation. Second, the variational density matrix eigensolver is proposed to determine the signal and noise subspaces utilizing the destructive swap test. As a proof of principle, we conduct two numerical experiments using a quantum simulator. Finally, the quantum labelling procedure is explored to determine the DOA. The proposed quantum method can potentially achieve exponential speedup on certain parameters and polynomial speedup on others under specific moderate circumstances, compared with their classical counterparts.

A quantum method for analysing the free electron laser

1996 ◽  
Vol 43 (3) ◽  
pp. 565-571 ◽  
Author(s):  
Ya Cheng ◽  
Jianwen Chen
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Quantum Method

THE QUANTUM METHOD OF THE INVERSE PROBLEM AND THE HEISENBERG XYZ MODEL

1979 ◽  
Vol 34 (5) ◽  
pp. 11-68 ◽  
Author(s):  
L A Takhtadzhan ◽  
Lyudvig D Faddeev
Keyword(s):  
Inverse Problem ◽  
Quantum Method

A generalized finite-difference time-domain quantum method for the N-body interacting Hamiltonian

2012 ◽  
Vol 183 (11) ◽  
pp. 2434-2440 ◽  
Author(s):  
Frederick Ira Moxley ◽  
Tim Byrnes ◽  
Fumitaka Fujiwara ◽  
Weizhong Dai
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Quantum Method ◽  
Difference Time

A new quantum method for electrostatic solvation energy of protein

2006 ◽  
Vol 125 (9) ◽  
pp. 094906 ◽  
Author(s):  
Ye Mei ◽  
Changge Ji ◽  
John Z. H. Zhang
Keyword(s):  
Solvation Energy ◽  
Quantum Method
Sign in / Sign up

Export Citation Format

Share Document