Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,714
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Research Volume
15,743 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Robustness of Magic and Symmetries of the Stabiliser Polytope
Markus Heinrich, D. Gross·Jul 26, 2018
We give a new algorithm for computing therobustness of magic- a measure of the utility of quantum states as a computational resource. Our work is motivated by themagic state modelof fault-tolerant quantum computation. In this model, all unitaries bel...
Tensor chain and constraints in tensor networks
Yi Ling, Yuxuan Liu, Zhuo-Yu Xian +1 more·Jul 26, 2018
A bstractWe develop our recent work on quantum error correction (QEC) and entanglement spectrum (ES) in tensor networks (arXiv:1806.05007). We propose a general framework for planar tensor network state with tensor constraints as a model for AdS3/CFT...
Network architecture for a topological quantum computer in silicon
B. Buonacorsi, Z. Cai, E. B. Ramirez +7 more·Jul 26, 2018
A design for a large-scale surface code quantum processor based on a node/network approach is introduced for semiconductor quantum dot spin qubits. The minimal node contains only seven quantum dots, and nodes are separated on the micron scale, creati...
Low-cost error mitigation by symmetry verification
X. Bonet-Monroig, R. Sagastizabal, M. Singh +1 more·Jul 26, 2018
We investigate the performance of error mitigation via measurement of conserved symmetries on near-term devices. We present two protocols to measure conserved symmetries during the bulk of an experiment, and develop a third, zero-cost, post-processin...
Toward an optimal quantum algorithm for polynomial factorization over finite fields
Javad Doliskani·Jul 25, 2018
We present a randomized quantum algorithm for polynomial factorization over finite fields. For polynomials of degree n over a finite field F_q, the average-case complexity of our algorithm is an expected O(n^{1 + o(1)} \log^{2 + o(1)}q) bit operation...
Algorithmic simulation of far-from-equilibrium dynamics using quantum computer
A. Zhukov, S. Remizov, W. Pogosov +2 more·Jul 25, 2018
We point out that superconducting quantum computers are prospective for the simulation of the dynamics of spin models far from equilibrium, including nonadiabatic phenomena and quenches. The important advantage of these machines is that they are prog...
Improving quantum parameter estimation by monitoring quantum trajectories
Yao Ma, M. Pang, Libo Chen +1 more·Jul 25, 2018
Quantum-enhanced parameter estimation has widespread applications in many fields. An important issue is to protect the estimation precision against the noise-induced decoherence. Here we develop a general theoretical framework for improving the preci...
Quantum simulation of chemistry with sublinear scaling in basis size
R. Babbush, D. Berry, J. McClean +1 more·Jul 25, 2018
We present a quantum algorithm for simulating quantum chemistry with gate complexity Õ(N1∕3η8∕3)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrs...
Silicon qubit fidelities approaching incoherent noise limits via pulse engineering
C. Yang, K. Chan, R. Harper +12 more·Jul 25, 2018
Spin qubits created from gate-defined silicon metal–oxide–semiconductor quantum dots are a promising architecture for quantum computation. The high single qubit fidelities possible in these systems, combined with quantum error correcting codes, could...
Stabilized Cat in a Driven Nonlinear Cavity: A Fault-Tolerant Error Syndrome Detector
S. Puri, A. Grimm, P. Campagne-Ibarcq +7 more·Jul 24, 2018
In quantum error correction, information is encoded in a high-dimensional system to protect it from the environment. A crucial step is to use natural, low-weight operations with an ancilla to extract information about errors without causing backactio...
Coherent Manipulation of a Molecular Ln-Based Nuclear Qudit Coupled to an Electron Qubit.
R. Hussain, G. Allodi, A. Chiesa +7 more·Jul 24, 2018
We demonstrate that the [Yb(trensal)] molecule is a prototypical coupled electronic qubit-nuclear qudit system. The combination of noise-resilient nuclear degrees of freedom and large reduction of nutation time induced by electron-nuclear mixing enab...
Computational speedups using small quantum devices
V. Dunjko, V. Dunjko, Y. Ge +1 more·Jul 24, 2018
Suppose we have a small quantum computer with only M qubits. Can such a device genuinely speed up certain algorithms, even when the problem size is much larger than M? Here we answer this question to the affirmative. We present a hybrid quantum-class...
Catalogue of topological electronic materials
Tiantian Zhang, Yi Jiang, Zhida Song +5 more·Jul 23, 2018
Topological electronic materials such as bismuth selenide, tantalum arsenide and sodium bismuthide show unconventional linear response in the bulk, as well as anomalous gapless states at their boundaries. They are of both fundamental and applied inte...
Loss-tolerant teleportation on large stabilizer states
S. Morley-Short, Mercedes Gimeno-Segovia, T. Rudolph +1 more·Jul 23, 2018
We present a general method for finding loss-tolerant teleportation on large, entangled stabilizer states using only single-qubit measurements, known as stabilizer pathfinding (SPF). For heralded loss, SPF is shown to generate optimally loss-tolerant...
Scaling laws of the Kondo problem at finite frequency
L. Bruhat, J. Viennot, M. Dartiailh +3 more·Jul 23, 2018
Driving a quantum system at finite frequency allows one to explore its dynamics. This has become a well-mastered resource for controlling the quantum state of two-level systems in the context of quantum information processing. However, this can also ...
A quantum Johnson-Lindenstrauss lemma via unitary t-designs
Pranab Sen·Jul 23, 2018
The famous Johnson-Lindenstrauss lemma states that for any set of n vectors, there is a linear transformation into a space of dimension O(log n) that approximately preserves all their lengths. In fact, a Haar random unitary transformation followed by...
From linear combination of quantum states to Grover's searching algorithm
Changpeng Shao·Jul 22, 2018
Linear combination of unitaries (LCU for short) is one of the most important techniques in designing quantum algorithms. In this paper, we propose a new quantum algorithm in three different forms to achieve LCU. Different from previous algorithms [Ch...
Direct Randomized Benchmarking for Multiqubit Devices.
T. Proctor, Arnaud Carignan-Dugas, K. Rudinger +3 more·Jul 20, 2018
Benchmarking methods that can be adapted to multiqubit systems are essential for assessing the overall or "holistic" performance of nascent quantum processors. The current industry standard is Clifford randomized benchmarking (RB), which measures a s...
Experimental repetitive quantum channel simulation.
Ling Hu, X. Mu, W. Cai +6 more·Jul 20, 2018
Universal control of quantum systems is a major goal to be achieved for quantum information processing, which demands thorough understanding of fundamental quantum mechanics and promises applications of quantum technologies. So far, most studies conc...
Heat-Bath Algorithmic Cooling with optimal thermalization strategies
Álvaro M. Alhambra, M. Lostaglio, Christopher Perry·Jul 20, 2018
Heat-Bath Algorithmic Cooling is a set of techniques for producing highly pure quantum systems by utilizing a surrounding heat-bath and unitary interactions. These techniques originally used the thermal environment only to fully thermalize ancillas a...