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Live trends in quantum computing research, updated daily from arXiv.
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Effects of Quantum Computing in Security
Abdulrahman AlRaimi, Sandrik Concepcion Das, S. Anis +1 more·Sep 27, 2021
One of the fundamental theories of physics is that of quantum mechanics. Quantum mechanics tries to explain the inconsistencies in the behaviors of systems at the macro and micro scales. Quantum mechanics paved the way for quantum computing based on ...
Quantum computational phase transition in combinatorial problems
Bingzhi Zhang, A. Sone, Quntao Zhuang·Sep 27, 2021
Quantum Approximate Optimization algorithm (QAOA) aims to search for approximate solutions to discrete optimization problems with near-term quantum computers. As there are no algorithmic guarantee possible for QAOA to outperform classical computers, ...
Efficient experimental characterization of quantum processes via compressed sensing on an NMR quantum processor
Akshay Gaikwad, Arvind, K. Dorai·Sep 27, 2021
We employ the compressed sensing (CS) algorithm and a heavily reduced data set to experimentally perform true quantum process tomography (QPT) on an NMR quantum processor. We obtain the estimate of the process matrix χ\documentclass[12pt]{minimal} \u...
Distributed Instrument Simulation with Quantum Side Information in the One-Shot Regime
Igor Bernard, Arun Padakandla·Sep 26, 2021
Three distributed parties, two transmitters (Txs) and a receiver (Rx), hold one component each of a tripartite quantum state \(ρ^{A_1A_2C}\). The goal is to simulate the action of a separable instrument acting on the \(A_1\) and \(A_2\) components, w...
Ionization energies in lithium and boron atoms using the Variational Quantum Eigensolver algorithm
Rene Villela, V. S. Prasannaa, B. Das·Sep 26, 2021
The classical-quantum hybrid Variational Quantum Eigensolver algorithm is the most widely used approach in the Noisy Intermediate Scale Quantum era to obtain ground state energies of atomic and molecular systems. In this work, we extend the scope of ...
Hybrid quantum classical graph neural networks for particle track reconstruction
Cenk Tüysüz, C. Rieger, Kristiane Novotny +6 more·Sep 26, 2021
The Large Hadron Collider (LHC) at the European Organisation for Nuclear Research (CERN) will be upgraded to further increase the instantaneous rate of particle collisions (luminosity) and become the High Luminosity LHC (HL-LHC). This increase in lum...
Quantum Identity-Based Encryption from the Learning with Errors Problem
Wenhua Gao, Li Yang, Daode Zhang +1 more·Sep 26, 2021
To prevent eavesdropping and tampering, network security protocols take advantage of asymmetric ciphers to establish session-specific shared keys with which further communication is encrypted using symmetric ciphers. Commonly used asymmetric algorith...
All-Photonic Architecture for Scalable Quantum Computing with Greenberger-Horne-Zeilinger States
S. Omkar, Seok-Hyung Lee, Yong-Siah Teo +2 more·Sep 25, 2021
Linear optical quantum computing is beset by the lack of deterministic entangling operations besides photon loss. Motivated by advancements at the experimental front in deterministic generation of various kinds of multiphoton entangled states, we pro...
A Quantum-Classical Hybrid Method for Image Classification and Segmentation
Sayantani Pramanik, M. Chandra, C. V. Sridhar +9 more·Sep 25, 2021
Enormous activity in the Quantum Computing area has resulted in it being considered, together with classical computers, for solving different difficult problems - including those of applied nature. An attempt is made in this work to assemble a pipeli...
Variational Quantum-Based Simulation of Waveguide Modes
W. Ewe, Dax Enshan Koh, Siong Thye Goh +2 more·Sep 25, 2021
Variational quantum algorithms (VQAs) are one of the most promising methods that can be implemented on noisy intermediate-scale quantum (NISQ) machines to achieve a quantum advantage over classical computers. This article describes the use of a VQA i...
Quantum State Preparation for the Schwinger Model
Giovanni Pederiva, A. Bazavov, Brandon Henke +4 more·Sep 24, 2021
It is not possible, using standard lattice techniques in Euclidean space, to calculate the complete fermionic spectrum of a quantum field theory. Algorithms running on quantum computers have the potential to access the theory with real-time evolution...
Adaptive variational preparation of the Fermi-Hubbard eigenstates
Gaurav Gyawali, M. Lawler·Sep 24, 2021
Approximating the ground states of strongly interacting electron systems in quantum chemistry and condensed matter physics is expected to be one of the earliest applications of quantum computers. In this paper, we prepare highly accurate ground state...
Multipartite generalization of geometric measure of discord
A. Hassan, P. Joag·Sep 24, 2021
Radhakrishnan et.al [Phys. Rev. Lett. 124, 110401 (2020)] proposed a generalization of quantum discord to multipartite systems, which is consistency with the conventional definition of discord in bipartite systems and derived explicit formulae for an...
Anomalous Loss Reduction Below Two‐Level System Saturation in Aluminum Superconducting Resonators
T. Tai, Jingnan Cai, S. Anlage·Sep 24, 2021
Superconducting resonators are widely used in many applications such as qubit readout for quantum computing, and kinetic inductance detectors. These resonators are susceptible to numerous loss and noise mechanisms, especially the dissipation due to t...
Polynomial T-depth quantum solvability of noisy binary linear problem: from quantum-sample preparation to main computation
Wooyeong Song, Youngrong Lim, Kabgyun Jeong +4 more·Sep 23, 2021
The noisy binary linear problem (NBLP) is known as a computationally hard problem, and therefore, it offers primitives for post-quantum cryptography. An efficient quantum NBLP algorithm that exhibits a polynomial quantum sample and time complexities ...
Quantum algorithms for group convolution, cross-correlation, and equivariant transformations
Grecia Castelazo, Quynh T. Nguyen, G. Palma +3 more·Sep 23, 2021
Group convolutions and cross-correlations, which are equivariant to the actions of group elements, are commonly used in mathematics to analyze or take advantage of symmetries inherent in a given problem setting. Here, we provide efficient quantum alg...
Any-To-Any Connected Cavity-Mediated Architecture for Quantum Computing with Trapped Ions or Rydberg Arrays
Joshua Ramette, Josiah Sinclair, Z. Vendeiro +3 more·Sep 23, 2021
We propose a hardware architecture and protocol for connecting many local quantum processors contained within an optical cavity. The scheme is compatible with trapped ions or Rydberg arrays, and realizes teleported gates between any two qubits by dis...
Progress towards Analytically Optimal Angles in Quantum Approximate Optimisation
D. Rabinovich, R. Sengupta, E. Campos +2 more·Sep 23, 2021
The quantum approximate optimisation algorithm is a p layer, time variable split operator method executed on a quantum processor and driven to convergence by classical outer-loop optimisation. The classical co-processor varies individual application ...
A non-anyonic qudit ZW-calculus
Quanlong Wang·Sep 23, 2021
ZW-calculus is a useful graphical language for pure qubit quantum computing. It is via the translation of the completeness of ZW-calculus that the first proof of completeness of ZX-calculus was obtained. A d-level generalisation of qubit ZW-calculus ...
Quantum criticality using a superconducting quantum processor
M. Dupont, J. Moore·Sep 22, 2021
Quantum criticality emerges from the collective behavior of many interacting quantum particles, often at the transition between different phases of matter. It is one of the cornerstones of condensed matter physics, which we access on noisy intermediat...