Results 71 to 80 of about 2,036,649 (124)

A Comparative Study of Quantum Haar Wavelet and Quantum Fourier Transforms for Quantum Image Transmission

Information
Quantum communication has achieved significant performance gains compared to classical systems but remains sensitive to channel noise and decoherence.
Udara Jayasinghe, Thanuj Fernando, Anil Fernando   +2 more
doaj   +1 more source

Reducing T-count and T-depth in approximate quantum Fourier transform circuits

Scientific Reports
The quantum Fourier transform (QFT) is a fundamental component in various quantum algorithms, including Shor’s factoring algorithm and the Harrow-Hassidim-Lloyd (HHL) algorithm for solving systems of linear equations.
Byeongyong Park, Doyeol Ahn
doaj   +1 more source

Time-Frequency Analysis Methods: A Comprehensive Review of Techniques, Applications, and Emerging Trends

Anbar Journal of Engineering Sciences
Time-frequency analysis (TFA) bridges the gap between temporal and spectral signal representations, enabling the study of non-stationary phenomena. This paper reviews classical and modern TFA methods, including the Fourier Transform (FT), Short-Time ...
Zaynab N. Abdulhameed, Haraa Raheem Hatem, Jinan N. Shehab, Israa Hazem Ali, Marwa Al-Sultani   +4 more
doaj   +1 more source

(t, n) Threshold d-Level Quantum Secret Sharing

Scientific Reports, 2017
Most of Quantum Secret Sharing(QSS) are (n, n) threshold 2-level schemes, in which the 2-level secret cannot be reconstructed until all n shares are collected.
Xiu-Li Song, Yan-Bing Liu, Hong-Yao Deng, Yong-Gang Xiao   +3 more
doaj   +1 more source

Near-infrared Fourier transform cavity-enhanced optical frequency comb spectroscopy

, 2014
Using Fourier transform-based cavity-enhanced optical frequency comb spectroscopy around 1.57 μm we measure high precision low pressure spectra of the 3v1+ v3 band of CO2 and high temperature H2O and OH spectra in a premixed methane/air flat flame.
Schmidt, Florian,, Maslowski, Piotr,, Foltynowicz, Aleksandra,, Khodabakhsh, Amir,, Rutkowski, Lucile,, Johansson, Alexandra C.,   +5 more
core   +1 more source

Robust Inverse Quantum Fourier Transform Inspired Algorithm for Unsupervised Image Segmentation

IEEE Access
Image segmentation is a crucial task in computer vision. In this study, we propose a method based on inverse quantum Fourier transform (IQFT) and develop a robust IQFT-inspired algorithm for unsupervised image segmentation.
Taoreed A. Akinola, Xiangfang Li, Richard Wilkins, Pamela H. Obiomon, Lijun Qian   +4 more
doaj   +1 more source

Quantum Fourier Transform Using Dynamic Circuits

Physical Review Letters
In dynamic quantum circuits, classical information from mid-circuit measurements is fed forward during circuit execution. This emerging capability of quantum computers confers numerous advantages that can enable more efficient and powerful protocols by drastically reducing the resource requirements for certain core algorithmic primitives. In particular,
Elisa Bäumer, Vinay Tripathi, Alireza Seif, Daniel Lidar, Derek S. Wang   +4 more
openaire   +3 more sources

A Generalised Transform Methodology Using Quantum Computation and Its Application for Electrocardiogram (ECG) Classification

IET Quantum Communication
Transforms play a pivotal role in the study of signals and images. With the advent of quantum systems, analysing signals in the quantum domain is of particular interest. In this work, we aim to build a generalised transform circuit in the quantum domain.
Bidisha Dhara, Monika Agrawal, Sumantra Dutta Roy   +2 more
doaj   +1 more source

QGeo: A Python Package for Calculating Geodesic Control Functions for Quantum Computing

Quantum Reports
We present a new Python package that uses the formalism of geometric quantum complexity to numerically compute metric-dependent geometric cost and control functions associated with preparing a given unitary transformation on a quantum computer.
Sean T. Crowe, Joshua J. Leiter, John P. T. Stenger, Zachary L. Barvian, Joseph A. Diaz, Shoshana Kinzel, Joanna N. Ptasinski, Daniel Gunlycke   +7 more
doaj   +1 more source

Tamper Localisation Using Quantum Fourier Transform Signatures for Medical Image Authentication

IET Quantum Communication
Medical image integrity is critical as telemedicine, cloud PACS and AI‐assisted diagnostics become routine. We present a tamper localisation framework that embeds authentication signatures in the phase domain of blockwise quantum Fourier transform (QFT ...
Kumar Sekhar Roy, Shweta Singh, Ruhul Amin Hazarika, Sk Mahmudul Hassan, Himanshu Ranjan Das   +4 more
doaj   +1 more source