Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
27,548
This Month
1,041
Today
0
Research Volume
12,907 papers in 12 months (-5% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Towards Efficient Ansatz Architecture for Variational Quantum Algorithms
Anbang Wu, Gushu Li, Yuke Wang +3 more·Nov 26, 2021
Variational quantum algorithms are expected to demonstrate the advantage of quantum computing on near-term noisy quantum computers. However, training such variational quantum algorithms suffers from gradient vanishing as the size of the algorithm inc...
Mitigating Noise-Induced Gradient Vanishing in Variational Quantum Algorithm Training
Anbang Wu, Gushu Li, Yufei Ding +1 more·Nov 25, 2021
Variational quantum algorithms are expected to demonstrate the advantage of quantum computing on near-term noisy quantum computers. However, training such variational quantum algorithms suffers from gradient vanishing as the size of the algorithm inc...
Bridging the reality gap in quantum devices with physics-aware machine learning
D. L. Craig, H. Moon, F. Fedele +9 more·Nov 22, 2021
The discrepancies between reality and simulation impede the optimisation and scalability of solid-state quantum devices. Disorder induced by the unpredictable distribution of material defects is one of the major contributions to the reality gap. We b...
Spin Relaxation in Quasi-1D GaAs Mesowires: Control via Electric Field and Aspect Ratio
S. Castelletto, ChanJu You, Deborah L. Gater +1 more·Nov 17, 2021
We report on the measurements of spin relaxation in GaAs quasi-onedimensional mesowires, relying on spin noise spectroscopy, thus adding to the existing body of spin relaxation studies in bulk, two-dimensional and zero dimensional systems. In additio...
Dissipative entanglement generation between two driven qubits in circuit quantum electrodynamics
Sebasti'an Luciano Gallardo, D. Domínguez, M. J. S'anchez·Nov 16, 2021
An entangled state generation protocol for a system of two qubits driven with an ac signal and coupled through a resonator is introduced. We explain the mechanism of entanglement generation in terms of an interplay between unitary Landau-Zener-Stücke...
Crystalline Formations of NbN/4H-SiC Heterostructure Interfaces
M. Katz, Chieh-I. Liu, A. Rigosi +4 more·Nov 16, 2021
Given the importance of incorporating various superconducting materials to device fabrication or substrate development, studying the interface for possible interactions is warranted. In this work, NbN films sputter-deposited on 4H-SiC were heat-treat...
Measurement-induced entanglement phase transitions in variational quantum circuits
R. Wiersema, Cunlu Zhou, J. Carrasquilla +1 more·Nov 15, 2021
Variational quantum algorithms (VQAs), which classically optimize a parametrized quantum circuit to solve a computational task, promise to advance our understanding of quantum many-body systems and improve machine learning algorithms using near-term ...
A Systematic Methodology to Compute the Quantum Vulnerability Factors for Quantum Circuits
Daniel Oliveira, Edoardo Giusto, Betis Baheri +3 more·Nov 13, 2021
Quantum computing is one of the most promising technology advances of the latest years. Qubits are highly sensitive to noise, which can make the output useless. Lately, it has been shown that superconducting qubits are extremely susceptible to extern...
Quality factor for zero-bias conductance peaks in Majorana nanowire
Y. Lai, S. Das Sarma, J. Sau·Nov 1, 2021
Despite recent experimental progress towards observing large zero-bias conductance peaks (ZBCPs) as signatures of Majorana modes, confusion remains about whether Majorana modes have been observed. This is in part due to the theoretical prediction of ...
Subtleties in the trainability of quantum machine learning models
Supanut Thanasilp, Samson Wang, Nhat A. Nghiem +2 more·Oct 27, 2021
A new paradigm for data science has emerged, with quantum data, quantum models, and quantum computational devices. This field, called quantum machine learning (QML), aims to achieve a speedup over traditional machine learning for data analysis. Howev...
Quantum Chaos and Universal Trotterisation Behaviours in Digital Quantum Simulations
C. Kargi, A. Manatuly, L. M. Sieberer +7 more·Oct 21, 2021
Digital quantum simulation (DQS) is one of the most promising paths for achieving first useful real-world applications for quantum processors. Yet even assuming rapid progress in device engineering and development of fault-tolerant quantum processors...
Measurement-induced criticality in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="double-struck">Z</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> -symmetric quantum automaton circuits
Yi-Fan Han, Xiao Chen·Oct 20, 2021
We study entanglement dynamics in hybrid $\mathbb{Z}_2$-symmetric quantum automaton circuits subject to local composite measurements. We show that there exists an entanglement phase transition from a volume law phase to a critical phase by varying th...
A Logarithmic Bayesian Approach to Quantum Error Detection
Ian Convy, K. B. Whaley·Oct 20, 2021
We consider the problem of continuous quantum error correction from a Bayesian perspective, proposing a pair of digital filters using logarithmic probabilities that are able to achieve near-optimal performance on a three-qubit bit-flip code, while st...
Near optimal sample complexity for matrix and tensor normal models via geodesic convexity
Cole Franks, Rafael Oliveira, Akshay Ramachandran +1 more·Oct 14, 2021
The matrix normal model, i.e., the family of Gaussian matrix-variate distributions whose covariance matrices are the Kronecker product of two lower dimensional factors, is frequently used to model matrix-variate data. The tensor normal model generali...
Controlling the dynamics of ultracold polar molecules in optical tweezers
Marta Sroczy'nska, Anna Dawid, M. Tomza +3 more·Oct 11, 2021
Ultracold molecules trapped in optical tweezers show great promise for the implementation of quantum technologies and precision measurements. We study a prototypical scenario where two interacting polar molecules placed in separate traps are controll...
First steps towards the quantum simulation of jet quenching
J. Barata, C. Salgado·Oct 6, 2021
The leading order $\alpha_s$ effect in jet quenching corresponds to the broadening of the jet's transverse momentum, due to the multiple interactions with the underlying medium. A complete understanding of momentum broadening is critical for the succ...
Designing the Quantum Channels Induced by Diagonal Gates
Jingzhen Hu, Q. Liang, R. Calderbank·Sep 28, 2021
The challenge of quantum computing is to combine error resilience with universal computation. Diagonal gates such as the transversal T gate play an important role in implementing a universal set of quantum operations. This paper introduces a framewor...
SU(2) hyper-clocks: Quantum engineering of spinor interferences for time and frequency metrology
T. Zanon-Willette, D. Wilkowski, R. Lefevre +2 more·Sep 28, 2021
In 1949, Ramsey’s method of separated oscillating fields was elaborated boosting over many decades metrological performances of atomic clocks and becoming the standard technique for very high precision spectroscopic measurements. A generalization of t...
Investigation of photon emitters in Ce-implanted hexagonal boron nitride
Gabriel I. L'opez-Morales, Mingxing Li, A. Hampel +9 more·Sep 17, 2021
Color centers in hexagonal boron nitride (hBN) are presently attracting broad interest as a novel platform for nanoscale sensing and quantum information processing. Unfortunately, their atomic structures remain largely elusive and only a small percen...
Formal Methods for Quantum Programs: A Survey
Christophe Chareton, Sébastien Bardin, Dongho Lee +3 more·Sep 14, 2021
While recent progress in quantum hardware open the door for significant speedup in certain key areas (cryptography, biology, chemistry, optimization, machine learning, etc), quantum algorithms are still hard to implement right, and the validation of ...