Results 31 to 40 of about 35,175 (225)

Quantum computers can search rapidly by using almost any transformation [PDF]

, 1997
A quantum computer has a clear advantage over a classical computer for exhaustive search. The quantum mechanical algorithm for exhaustive search was originally derived by using subtle properties of a particular quantum mechanical operation called the ...
C. H. Bennett, C. H. Bennett, D. Deutsch, J. Hopfield, L. K. Grover, L. K. Grover, L. K. Grover, Lov K. Grover, M. Boyer, P. Shor, P. W. Shor, T. M. Liss   +11 more
core   +2 more sources

A Characterization of Generalized Boolean Functions Employed in CDMA Communications [PDF]

International Journal of Mathematical, Engineering and Management Sciences
In design of secure cryptosystems and CDMA communications, the negabent functions play a significant role. The generalized Boolean functions have been extensively studied by Schmidt and established several important results in this setup.
Deep Singh, Anjali Chawla, Pramod Bhogta, Amit Paul   +3 more
doaj   +1 more source

A Fourier-analytic Approach to Counting Partial Hadamard Matrices

, 2010
In this paper, we study a family of lattice walks which are related to the Hadamard conjecture. There is a bijection between paths of these walks which originate and terminate at the origin and equivalence classes of partial Hadamard matrices. Therefore,
de Launey, Warwick, Levin, David A.
core   +1 more source

Hadamard transform imaging [PDF]

, 1992
We have constructed a Hadamard transform Raman microscopic imaging system, and have developed it to a high definition (64K pixel) technique. We have demonstrated multispectral Raman imaging and developed the first three-dimensional (digital confocal) Raman imaging. We have explored the systematic errors in Hadamard multiplexing techniques and developed
openaire   +2 more sources

Using the Hadamard and related transforms for simplifying the spectrum of the quantum baker's map

, 2006
We rationalize the somewhat surprising efficacy of the Hadamard transform in simplifying the eigenstates of the quantum baker's map, a paradigmatic model of quantum chaos.
Allouche J P, Allouche J P, Anantharaman N Nonnenmacher S, Arul Lakshminarayan, Eckhardt B, Ermann L Saraceno M, Godreche C, Keating J P, Knabe S, Lakshminarayan A, Lichtenberg A J, Meenakshisundaram N Lakshminarayan A Lakshmanan M Sahadevan R, N Meenakshisundaram, Nonnenmacher S, Penrose O, Schnirelman A, Schroeder M R, Zaks M A   +17 more
core   +1 more source

Block circulant matrices with circulant blocks, weil sums and mutually unbiased bases, II. The prime power case [PDF]

, 2007
In our previous paper \cite{co1} we have shown that the theory of circulant matrices allows to recover the result that there exists $p+1$ Mutually Unbiased Bases in dimension $p$, $p$ being an arbitrary prime number.
Berndt B. C., Bjšrck G., Davis P. J., Hadamard J., Klappenecker A., Monique Combescure, Schwinger J., Weyl H.   +7 more
core   +5 more sources

Quantum Computing and a Unified Approach to Fast Unitary Transforms

, 2002
A quantum computer directly manipulates information stored in the state of quantum mechanical systems. The available operations have many attractive features but also underly severe restrictions, which complicate the design of quantum algorithms.
Agaian, Sos S., Klappenecker, Andreas
core   +1 more source

Efficient Screening of Organic Singlet Fission Molecules Using Graph Neural Networks

Advanced Science, EarlyView.
A high‐throughput screening framework based on graph neural networks (GNNs) and multi‐level validation facilitates the identification of singlet fission (SF) candidates. By efficiently predicting excitation energies across 20 million molecules, and integrating TDDFT calculations, synthetic accessibility assessments, and GW+BSE calculations, this ...
Li Fu, Longfei Lv, Fan Zhang, Si Zhou, Weiwei Gao, Jijun Zhao   +5 more
wiley   +1 more source

Metaheuristics in the Optimization of Cryptographic Boolean Functions

Entropy, 2020
Generating Boolean Functions (BFs) with high nonlinearity is a complex task that is usually addresses through algebraic constructions. Metaheuristics have also been applied extensively to this task. However, metaheuristics have not been able to attain so
Isaac López-López, Guillermo Sosa-Gómez, Carlos Segura, Diego Oliva, Omar Rojas   +4 more
doaj   +1 more source

Using the discrete hadamard transform to detect moving objects in surveillance video [PDF]

, 2009
In this paper we present an approach to object detection in surveillance video based on detecting moving edges using the Hadamard transform. The proposed method is characterized by robustness to illumination changes and ghosting effects and provides ...
Kim, Chanyul, O'Connor, Noel E.
core   +1 more source