Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,509 papers in 12 months (-19% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Secure Software Leasing from Standard Assumptions
Fuyuki Kitagawa, R. Nishimaki, Takashi Yamakawa·Oct 21, 2020
Secure software leasing (SSL) is a quantum cryptographic primitive that enables users to execute software only during the software is leased. It prevents users from executing leased software after they return the leased software to its owner. SSL can...
Variational quantum algorithm for estimating the quantum Fisher information
J. Beckey, M. Cerezo, A. Sone +1 more·Oct 20, 2020
The Quantum Fisher information (QFI) quantifies the ultimate precision of estimating a parameter from a quantum state, and can be regarded as a reliability measure of a quantum system as a quantum sensor. However, estimation of the QFI for a mixed st...
Bosonic quantum error correction codes in superconducting quantum circuits
W. Cai, Yuwei Ma, Wei Wang +2 more·Oct 17, 2020
Quantum information is vulnerable to environmental noise and experimental imperfections, hindering the reliability of practical quantum information processors. Therefore, quantum error correction (QEC) that can protect quantum information against noi...
Adaptive Circuit Learning for Quantum Metrology
Ziqi Ma, P. Gokhale, Tian-Xing Zheng +5 more·Oct 17, 2020
Quantum sensing is an important application of emerging quantum technologies. We explore whether a hybrid system of quantum sensors and quantum circuits can surpass the classical limit of sensing. In particular, we use optimization techniques to sear...
Quantum simulation of oscillating neutrinos.
Abhishek Kumar Jha, A. Chatla, B. Bambah·Oct 13, 2020
Two and three flavor oscillating neutrinos are shown to exhibit the properties bipartite and tripartite quantum entanglement. The two and three flavor neutrinos are mapped to qubit states used in quantum information theory. Such quantum bits of the n...
Quantum autoencoders with enhanced data encoding
Carlos Bravo-Prieto·Oct 13, 2020
We present the enhanced feature quantum autoencoder, or EF-QAE, a variational quantum algorithm capable of compressing quantum states of different models with higher fidelity. The key idea of the algorithm is to define a parameterized quantum circuit...
Quantum-enhanced barcode decoding and pattern recognition
L. Banchi, Quntao Zhuang, S. Pirandola·Oct 7, 2020
Quantum hypothesis testing is one of the most fundamental problems in quantum information theory, with crucial implications in areas like quantum sensing, where it has been used to prove quantum advantage in a series of binary photonic protocols, e.g...
Scaling up reservoir engineering for error-correcting codes
Vincent Martin, A. Sarlette·Oct 6, 2020
Error-correcting codes are usually envisioned to counter errors by operating unitary corrections depending on the projective measurement results of some syndrome observables. We here propose a way to use them in a more integrated way, where the error...
Optimal State Transfer and Entanglement Generation in Power-Law Interacting Systems
Minh C. Tran, Andrew Y. Guo, A. Deshpande +2 more·Oct 6, 2020
We present an optimal protocol for encoding an unknown qubit state into a multiqubit Greenberger-Horne-Zeilinger-like state and, consequently, transferring quantum information in large systems exhibiting power-law (1/rα) interactions. For all power-l...
Quantum Computing Solution of DC Power Flow
R. Eskandarpour, Kumar Ghosh, A. Khodaei +3 more·Oct 6, 2020
In this paper, we model and solve a fundamental power system problem, i.e., DC power flow, using a practical quantum computer. The Harrow-Hassidim-Lloyd (HHL) quantum algorithm is used to solve the DC power flow problem. The HHL algorithm for the sol...
A quantum encryption design featuring confusion, diffusion, and mode of operation
Zixuan Hu, S. Kais·Oct 6, 2020
Quantum cryptography—the application of quantum information processing and quantum computing techniques to cryptography has been extensively investigated. Two major directions of quantum cryptography are quantum key distribution (QKD) and quantum enc...
Optimal noise estimation from syndrome statistics of quantum codes
Thomas Wagner, H. Kampermann, D. Bruß +1 more·Oct 5, 2020
Quantum error correction allows to actively correct errors occurring in a quantum computation when the noise is weak enough. To make this error correction competitive information about the specific noise is required. Traditionally, this information i...
ZX-Calculus and Extended Hypergraph Rewriting Systems I: A Multiway Approach to Categorical Quantum Information Theory
Jonathan Gorard, Manojna Namuduri, X. Arsiwalla·Oct 5, 2020
Categorical quantum mechanics and the Wolfram model offer distinct but complementary approaches to studying the relationship between diagrammatic rewriting systems over combinatorial structures and the foundations of physics; the objective of the pre...
Rapid characterisation of linear-optical networks via PhaseLift.
D. Suess, N. Maraviglia, R. Kueng +6 more·Oct 1, 2020
Linear-optical circuits are elementary building blocks for classical and quantum information processing with light. In particular, due to its monolithic structure, integrated photonics offers great phase-stability and can rely on the large scale manu...
Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions
M. Grimm, A. Beckert, G. Aeppli +1 more·Sep 29, 2020
We propose a scheme for universal quantum computing based on Kramers rare-earth ions. Their nuclear spins in the presence of a Zeeman-split electronic crystal field ground state act as 'passive' qubits which store quantum information. The qubits can ...
High-fidelity single-shot readout of single electron spin in diamond with spin-to-charge conversion
Qi Zhang, Yuhang Guo, Wentao Ji +8 more·Sep 29, 2020
High fidelity single-shot readout of qubits is a crucial component for fault-tolerant quantum computing and scalable quantum networks. In recent years, the nitrogen-vacancy (NV) center in diamond has risen as a leading platform for the above applicat...
Squeezed comb states
N. Shukla, S. Nimmrichter, B. Sanders·Sep 27, 2020
Continuous-variable codes are an expedient solution for quantum information processing and quantum communication involving optical networks. Here we characterize the squeezed comb, a finite superposition of equidistant squeezed coherent states on a l...
The modified logarithmic Sobolev inequality for quantum spin systems: classical and commuting nearest neighbour interactions
'Angela Capel, Cambyse Rouz'e, Daniel Stilck Francca·Sep 24, 2020
Given a uniform, frustration-free family of local Lindbladians defined on a quantum lattice spin system in any spatial dimension, we prove a strong exponential convergence in relative entropy of the system to equilibrium under a condition of spatial ...
Fault-Tolerant Operation of a Quantum Error-Correction Code
L. Egan, D. Debroy, C. Noel +8 more·Sep 24, 2020
Quantum error correction protects fragile quantum information by encoding it in a larger quantum system whose extra degrees of freedom enable the detection and correction of errors. An encoded logical qubit thus carries increased complexity compared ...
Equivalence of Three Classical Algorithms With Quantum Side Information: Privacy Amplification, Error Correction, and Data Compression
T. Tsurumaru·Sep 18, 2020
Privacy amplification (PA) is an indispensable component in classical and quantum cryptography. Error correction (EC) and data compression (DC) algorithms are also indispensable in classical and quantum information theory. We here study these three a...