Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,611
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Research Volume
15,673 papers in 12 months (-39% vs prior quarter)
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Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Floating Tunable Coupler for Scalable Quantum Computing Architectures
E. Sete, Angela Q. Chen, R. Manenti +2 more·Mar 12, 2021
We propose a floating tunable coupler that does not rely on direct qubit-qubit coupling capacitances to achieve the zero-coupling condition. We show that the polarity of the qubit-coupler couplings can be engineered to offset the otherwise constant q...
Error Mitigation and Quantum-Assisted Simulation in the Error Corrected Regime.
M. Lostaglio, A. Ciani·Mar 12, 2021
A standard approach to quantum computing is based on the idea of promoting a classically simulable and fault-tolerant set of operations to a universal set by the addition of "magic" quantum states. In this context, we develop a general framework to d...
A hole spin qubit in a fin field-effect transistor above 4 kelvin
L. Camenzind, S. Geyer, Andreas Fuhrer +3 more·Mar 12, 2021
The greatest challenge in quantum computing is achieving scalability. Classical computing, which previously faced such issues, currently relies on silicon chips hosting billions of fin field-effect transistors. These devices are small enough for quan...
Low-Overhead Fault-Tolerant Quantum Error Correction with the Surface-GKP Code
Kyungjoo Noh, C. Chamberland, F. Brandão·Mar 11, 2021
Fault-tolerant quantum error correction is essential for implementing quantum algorithms of significant practical importance. In this work, we propose a highly effective use of the surface-GKP code, i.e., the surface code consisting of bosonic GKP qu...
A High-Sensitivity Charge Sensor for Silicon Qubits above 1 K.
J. Y. Huang, W. H. Lim, R. Leon +6 more·Mar 11, 2021
Recent studies of silicon spin qubits at temperatures above 1 K are encouraging demonstrations that the cooling requirements for solid-state quantum computing can be considerably relaxed. However, qubit readout mechanisms that rely on charge sensing ...
Simplification Strategies for the Qutrit ZX-Calculus
Alex Townsend-Teague, K. Meichanetzidis·Mar 11, 2021
The ZX-calculus is a graphical language for suitably represented tensor networks, called ZX-diagrams. Calculations are performed by transforming ZX-diagrams with rewrite rules. The ZX-calculus has found applications in reasoning about quantum circuit...
Neural predictor based quantum architecture search
Shi-Xin Zhang, Chang-Yu Hsieh, Shengyu Zhang +1 more·Mar 11, 2021
Variational quantum algorithms (VQAs) are widely speculated to deliver quantum advantages for practical problems under the quantum–classical hybrid computational paradigm in the near term. Both theoretical and practical developments of VQAs share man...
Topologically Protected Valley-Dependent Quantum Photonic Circuits.
Yang Chen, Xin-Tao He, Yujie Cheng +7 more·Mar 11, 2021
Topological photonics has been introduced as a powerful platform for integrated optics, since it can deal with robust light transport, and be further extended to the quantum world. Strikingly, valley-contrasting physics in topological photonic struct...
Resolving correlated states of benzyne with an error-mitigated contracted quantum eigensolver
Scott E. Smart, Jan-Niklas Boyn, D. Mazziotti·Mar 11, 2021
The simulation of strongly correlated many-electron systems is one of the most promising applications for near-term quantum devices. Here we use a class of eigenvalue solvers (presented in Phys. Rev. Lett. 126, 070504 (2021)) in which a contraction o...
Experimental accreditation of outputs of noisy quantum computers
Samuele Ferracin, S. Merkel, D. McKay +1 more·Mar 11, 2021
We provide and experimentally demonstrate an accreditation protocol that upper-bounds the variation distance between noisy and noiseless probability distributions of the outputs of arbitrary quantum computations. We accredit the outputs of twenty-fou...
A semi-agnostic ansatz with variable structure for variational quantum algorithms
Matías Bilkis, M. Cerezo, Guillaume Verdon +2 more·Mar 11, 2021
Quantum machine learning—and specifically Variational Quantum Algorithms (VQAs)—offers a powerful, flexible paradigm for programming near-term quantum computers, with applications in chemistry, metrology, materials science, data science, and mathemat...
Factoring 2048-bit RSA Integers in 177 Days with 13 436 Qubits and a Multimode Memory.
É. Gouzien, N. Sangouard·Mar 10, 2021
We analyze the performance of a quantum computer architecture combining a small processor and a storage unit. By focusing on integer factorization, we show a reduction by several orders of magnitude of the number of processing qubits compared with a ...
Electric-dipole-induced resonance and decoherence of a dressed spin in a quantum dot
Peihao Huang, Xuedong Hu·Mar 10, 2021
Electron spin qubit in a quantum dot has been studied extensively for scalable quantum information processing over the past two decades. Recently, high-fidelity and fast single-spin control and strong spin-photon coupling have been demonstrated using...
Quantum machine learning with differential privacy
William Watkins, Samuel Yen-Chi Chen, Shinjae Yoo·Mar 10, 2021
Quantum machine learning (QML) can complement the growing trend of using learned models for a myriad of classification tasks, from image recognition to natural speech processing. There exists the potential for a quantum advantage due to the intractab...
Quantum Low-Density Parity-Check Codes
N. P. Breuckmann, J. Eberhardt·Mar 10, 2021
Quantum error correction is an indispensable ingredient for scalable quantum computing. In this Perspective we discuss a particular class of quantum codes called low-density parity-check (LDPC) quantum codes. The codes we discuss are alternatives to ...
Optimize quantum simulation using a force-gradient integrator
Y. Zou, Yu-Jiao Bo, Ji-Chong Yang·Mar 10, 2021
Quantum simulation has shown great potential in many fields due to its powerful computational capabilities. However, the limited fidelity can lead to a severe limitation on the number of gate operations, which requires us to find optimized algorithms...
Quantum Algorithms in Cybernetics
Petar Nikolov·Mar 10, 2021
A new method for simulation of a binary homogeneous Markov process using a quantum computer was proposed. This new method allows using the distinguished properties of the quantum mechanical systems -- superposition, entanglement and probability calcu...
A Quantum Algorithm for the Sensitivity Analysis of Business Risks
M. C. Braun, T. Decker, N. Hegemann +2 more·Mar 9, 2021
We present a novel use case for quantum computation: the sensitivity analysis for a risk model used at Deutsche B\"orse Group. Such an analysis is computationally too expensive to perform on classical computers. We show in detail how the risk model a...
Dependence of integrated, instantaneous, and fluctuating entropy production on the initial state in quantum and classical processes.
Artemy Kolchinsky, D. Wolpert·Mar 9, 2021
We consider the additional entropy production (EP) incurred by a fixed quantum or classical process on some initial state ρ, above the minimum EP incurred by the same process on any initial state. We show that this additional EP, which we term the "m...
Fast Simulation of Bosonic Qubits via Gaussian Functions in Phase Space
J. Bourassa, N. Quesada, I. Tzitrin +6 more·Mar 9, 2021
Bosonic qubits are a promising route to building fault-tolerant quantum computers on a variety of physical platforms. Studying the performance of bosonic qubits under realistic gates and measurements is challenging with existing analytical and numeri...