Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
27,881
This Month
1,306
Today
0
Research Volume
13,145 papers in 12 months (+1% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
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 ...
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...
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 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...
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 ...
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...
Error Mitigation for Universal Gates on Encoded Qubits.
C. Piveteau, David Sutter, S. Bravyi +2 more·Mar 8, 2021
The Eastin-Knill theorem states that no quantum error-correcting code can have a universal set of transversal gates. For Calderbank-Shor-Steane codes that can implement Clifford gates transversally, it suffices to provide one additional non-Clifford ...
Rademacher complexity of noisy quantum circuits
Kaifeng Bu, Dax Enshan Koh, Lu Li +2 more·Mar 4, 2021
Noise in quantum systems is a major obstacle to implementing many quantum algorithms on large quantum circuits. In this work, we study the effects of noise on the Rademacher complexity of quantum circuits, which is a measure of statistical complexity...
Filter-function formalism and software package to compute quantum processes of gate sequences for classical non-Markovian noise
Tobias Hangleiter, Pascal Cerfontaine, H. Bluhm·Mar 3, 2021
Correlated, non-Markovian noise is present in many solid-state systems employed as hosts for quantum information technologies, significantly complicating the realistic theoretical description of these systems. In this regime, the effects of noise on ...
Filter Functions for Quantum Processes under Correlated Noise.
Pascal Cerfontaine, Tobias Hangleiter, H. Bluhm·Mar 3, 2021
Many qubit implementations are afflicted by correlated noise not captured by standard theoretical tools that are based on Markov approximations. While independent gate operations are a key concept for quantum computing, it is actually not possible to...
Variational Learning for Quantum Artificial Neural Networks
F. Tacchino, Stefano Mangini, P. Barkoutsos +4 more·Feb 26, 2021
In the past few years, quantum computing and machine learning fostered rapid developments in their respective areas of application, introducing new perspectives on how information processing systems can be realized and programmed. The rapidly growing...
Quantum Circuits for Exact Unitary t -Designs and Applications to Higher-Order Randomized Benchmarking
Y. Nakata, Da Zhao, T. Okuda +9 more·Feb 25, 2021
A unitary $t$-design is a powerful tool in quantum information science and fundamental physics. Despite its usefulness, only approximate implementations were known for general $t$. In this paper, we provide for the first time quantum circuits that ge...
Continuous-variable multipartite vibrational entanglement
M. Abdi·Feb 25, 2021
A compact scheme for the preparation of macroscopic multipartite entanglement is proposed and analyzed. In this scheme the vibrational modes of a mechanical resonator constitute continuous variable (CV) subsystems that entangle to each other as a res...
Binary Subspace Chirps
Tefjol Pllaha, O. Tirkkonen, R. Calderbank·Feb 24, 2021
We describe in detail the interplay between binary symplectic geometry and notions from quantum computation, with the ultimate goal of constructing highly structured codebooks. The Binary Chirps (BCs) are Complex Grassmannian Lines in <inline-formula...
Charge-conserving unitaries typically generate optimal covariant quantum error-correcting codes
Linghang Kong, Zi-Wen Liu·Feb 23, 2021
Quantum error correction and symmetries play central roles in quantum information science and physics. It is known that quantum error-correcting codes covariant with respect to continuous symmetries cannot correct erasure errors perfectly (an importa...
Quantum Entropic Causal Inference
Mohammad Ali Javidian, V. Aggarwal, F. Bao +1 more·Feb 23, 2021
The class of problems in causal inference which seeks to isolate causal correlations solely from observational data even without interventions has come to the forefront of machine learning, neuroscience and social sciences. As new large scale quantum...
Robust Control of Quantum Dynamics under Input and Parameter Uncertainty
Andrew Koswara, Vaibhav Bhutoria, R. Chakrabarti·Feb 23, 2021
Despite significant progress in theoretical and laboratory quantum control, engineering quantum systems remains principally challenging due to manifestation of noise and uncertainties associated with the field and Hamiltonian parameters. In this pape...
Layer VQE: A Variational Approach for Combinatorial Optimization on Noisy Quantum Computers
Xiaoyuan Liu, Anthony Angone, Ruslan Shaydulin +3 more·Feb 10, 2021
Combinatorial optimization on near-term quantum devices is a promising path to demonstrating quantum advantage. However, the capabilities of these devices are constrained by high noise or error rates. In this article, inspired by the variational quan...
Average fidelity and fidelity deviation in noisy quantum teleportation
Wooyeong Song, Junghee Ryu, Kyunghyun Baek +1 more·Feb 10, 2021
We analyze the average fidelity (say, F) and the fidelity deviation (say, D) in noisy-channel quantum teleportation. Here, F represents how well teleportation is performed on average and D quantifies whether the teleportation is performed impartially...
Quantum Algorithm for DOA Estimation in Hybrid Massive MIMO
Fanxu Meng·Feb 8, 2021
The direction of arrival (DOA) estimation in array signal processing is an important research area. The effectiveness of the direction of arrival greatly determines the performance of multi-input multioutput (MIMO) antenna systems. The multiple signa...