Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Performance of five-qubit code for arbitrary error channels
Long Huang, Xiaohua Wu, T. Zhou·Jul 31, 2017
In quantum error correction, it is an important assumption that errors on different qubits are independent. In our previous work [Phys. Rev. A {\bf 92}, 052320 (2015)], the generality of the concatenated five-qubit code has been investgated when nois...
Extreme Quantum Advantage for Rare-Event Sampling
Cina Aghamohammadi, Samuel P. Loomis, J. Mahoney +1 more·Jul 29, 2017
We introduce a quantum algorithm for efficient biased sampling of the rare events generated by classical memoryful stochastic processes. We show that this quantum algorithm gives an extreme advantage over known classical biased sampling algorithms in...
Computationally Efficient Nonlinear Bell Inequalities for Quantum Networks.
M. Luo·Jul 29, 2017
The correlations in quantum networks have attracted strong interest with new types of violations of the locality. The standard Bell inequalities cannot characterize the multipartite correlations that are generated by multiple sources. The main proble...
An Improved Quantum Algorithm for Ridge Regression
Chao-Hua Yu, F. Gao, Q. Wen·Jul 29, 2017
Ridge regression (RR) is an important machine learning technique which introduces a regularization hyperparameter <inline-formula><tex-math notation="LaTeX">$\alpha$</tex-math><alternatives><mml:math><mml:mi>α</mml:mi></mml:math><inline-graphic xlink...
Demonstration of the no-hiding theorem on the 5-Qubit IBM quantum computer in a category-theoretic framework
Amolak Ratan Kalra, Navya Gupta, B. K. Behera +2 more·Jul 29, 2017
The quantum no-hiding theorem, first proposed by Braunstein and Pati (Phys Rev Lett 98:080502, 2007), was verified experimentally by Samal et al. (Phys Rev Lett 186:080401, 2011) using NMR quantum processor. Till then, this fundamental test has not b...
Rewiring stabilizer codes
K. Colladay, E. Mueller·Jul 28, 2017
We present an algorithm for manipulating quantum information via a sequence of projective measurements. We frame this manipulation in the language of stabilizer codes: a quantum computation approach in which errors are prevented and corrected in part...
Arithmetic Circuits for Multilevel Qudits Based on Quantum Fourier Transform
Archimedes Pavlidis, E. Floratos·Jul 27, 2017
We present some basic integer arithmetic quantum circuits, such as adders and multipliers-accumulators of various forms, as well as diagonal operators, which operate on multilevel qudits. The integers to be processed are represented in an alternative...
Quantum error correction using weak measurements
Parveen Kumar, Apoorva D. Patel·Jul 27, 2017
The standard quantum error correction protocols use projective measurements to extract the error syndromes from the encoded states. We consider the more general scenario of weak measurements, where only partial information about the error syndrome ca...
Quantum machine learning: a classical perspective
C. Ciliberto, M. Herbster, Alessandro Davide Ialongo +4 more·Jul 26, 2017
Recently, increased computational power and data availability, as well as algorithmic advances, have led machine learning (ML) techniques to impressive results in regression, classification, data generation and reinforcement learning tasks. Despite t...
Entanglement spectroscopy on a quantum computer
S. Johri, Damian S. Steiger, M. Troyer·Jul 24, 2017
We present a quantum algorithm to compute the entanglement spectrum of arbitrary quantum states. The interesting universal part of the entanglement spectrum is typically contained in the largest eigenvalues of the density matrix which can be obtained...
Experimental demonstration of selective quantum process tomography on an NMR quantum information processor
Akshay Gaikwad, Diksha Rehal, Amandeep Singh +2 more·Jul 21, 2017
We present the NMR implementation of a scheme for selective and efficient quantum process tomography without ancilla. We generalize this scheme such that it can be implemented efficiently using only a set of measurements involving product operators. ...
Global Optimization based on Growth Transform Dynamical Model
Oindrila Chatterjee, S. Chakrabartty·Jul 21, 2017
Conservation principles like conservation of charge or energy provide a natural way to couple and constrain different physical variables. In this letter, we propose a dynamical system model that exploits these constraints for solving non-convex globa...
Geometric phase corrections on a moving particle in front of a dielectric mirror
F. Lombardo, P. I. Villar·Jul 21, 2017
We consider an atom (represented by a two-level system) moving in front of a dielectric plate, and study how traces of dissipation and decoherence (both effects induced by vacuum field fluctuations) can be found in the corrections to the unitary geom...
Blueprint for fault-tolerant quantum computation with Rydberg atoms
J. Auger, S. Bergamini, D. Browne·Jul 20, 2017
We present a blueprint for building a fault-tolerant universal quantum computer with Rydberg atoms. Our scheme, which is based on the surface code, uses individually addressable, optically trapped atoms as qubits and exploits electromagnetically indu...
Computation of Molecular Spectra on a Quantum Processor with an Error-Resilient Algorithm
J. Colless, V. Ramasesh, D. Dahlen +5 more·Jul 20, 2017
© 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of...
Quantum dynamics in transverse-field Ising models from classical networks
M. Schmitt, M. Heyl·Jul 20, 2017
The efficient representation of quantum many-body states with classical resources is a key challenge in quantum many-body theory. In this work we analytically construct classical networks for the description of the quantum dynamics in transverse-fiel...
A quantum algorithm for greatest common divisor problem
Wen Wang, Xu Jiang, Liang-zhu Mu +1 more·Jul 20, 2017
We present a quantum algorithm solving the greatest common divisor (GCD) problem. This quantum algorithm possesses similar computational complexity with classical algorithms, such as the well-known Euclidean algorithm for GCD. This algorithm is an ap...
Use of global interactions in efficient quantum circuit constructions
D. Maslov, Y. Nam·Jul 20, 2017
In this paper we study the ways to use a global entangling operator to efficiently implement circuitry common to a selection of important quantum algorithms. In particular, we focus on the circuits composed with global Ising entangling gates and arbi...
Electro-optic routing of photons from a single quantum dot in photonic integrated circuits
L. Midolo, S. L. Hansen, Weili Zhang +6 more·Jul 20, 2017
Recent breakthroughs in solid-state photonic quantum technologies enable the generation and detection of single photons with near-unity efficiency as required for a range of photonic quantum technologies. The lack of methods to simultaneously generat...
Global multipartite entanglement dynamics in Grover’s search algorithm
Minghua Pan, Daowen Qiu, Shenggen Zheng·Jul 20, 2017
Entanglement is considered to be one of the primary reasons for why quantum algorithms are more efficient than their classical counterparts for certain computational tasks. The global multipartite entanglement of the multiqubit states in Grover’s sea...