Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
28,494
This Month
224
Today
0
Research Volume
13,591 papers in 12 months (-18% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Exponential suppression of bit-flips in a qubit encoded in an oscillator
R. Lescanne, M. Villiers, T. Peronnin +6 more·Jul 26, 2019
A quantum system interacts with its environment—if ever so slightly—no matter how much care is put into isolating it1. Therefore, quantum bits undergo errors, putting dauntingly difficult constraints on the hardware suitable for quantum computation2....
Always-On Quantum Error Tracking with Continuous Parity Measurements
Razieh Mohseninia, Jing Yang, I. Siddiqi +2 more·Jul 20, 2019
We investigate quantum error correction using continuous parity measurements to correct bit-flip errors with the three-qubit code. Continuous monitoring of errors brings the benefit of a continuous stream of information, which facilitates passive err...
Practical trapped-ion protocols for universal qudit-based quantum computing
Pei Jiang Low, Brendan M. White, Andrew A. Cox +2 more·Jul 19, 2019
The notion of universal quantum computation can be generalized to multi-level qudits, which offer advantages in resource usage and algorithmic efficiencies. Trapped ions, which are pristine and well-controlled quantum systems, offer an ideal platform...
Finite Speed of Quantum Scrambling with Long Range Interactions.
Chi-Fang Chen, A. Lucas·Jul 17, 2019
In a locally interacting many-body system, two isolated qubits, separated by a large distance r, become correlated and entangled with each other at a time t≥r/v. This finite speed v of quantum information scrambling limits quantum information process...
Photonic quantum information processing: A concise review
S. Slussarenko, G. Pryde·Jul 15, 2019
Photons have been a flagship system for studying quantum mechanics, advancing quantum information science, and developing quantum technologies. Quantum entanglement, teleportation, quantum key distribution and early quantum computing demonstrations w...
π-Corrected Heisenberg Limit.
Wojciech Górecki, R. Demkowicz-Dobrzański, H. Wiseman +1 more·Jul 11, 2019
We consider the precision Δφ with which the parameter φ, appearing in the unitary map U_{φ}=e^{iφΛ}, acting on some type of probe system, can be estimated when there is a finite amount of prior information about φ. We show that, if U_{φ} acts n times...
Automated analysis of single-tone spectroscopic data for cQED systems
G. Fedorov, A. Ustinov·Jul 11, 2019
Physical systems for quantum computation require calibration of the control parameters based on their physical characteristics by performing a chain of experiments that gather most precise information about the given device. It follows that there is ...
Quantum Key Distribution Based on the Quantum Eraser
T. Elsayed·Jul 7, 2019
Quantum information and quantum foundations are becoming popular topics for advanced undergraduate courses. Many of the fundamental concepts and applications in these two fields, such as delayed choice experiments and quantum encryption, are comprehe...
Hamiltonian learning for quantum error correction
Agnes Valenti, Evert P L van Nieuwenburg, S. Huber +1 more·Jul 4, 2019
The efficient validation of quantum devices is critical for emerging technological applications. In a wide class of use-cases the precise engineering of a Hamiltonian is required both for the implementation of gate-based quantum information processin...
Resource reduction for distributed quantum information processing using quantum multiplexed photons
N. Piparo, M. Hanks, C. Gravel +2 more·Jul 4, 2019
Distributed quantum information processing is based on the transmission of quantum data over lossy channels between quantum processing nodes. These nodes may be separated by a few microns or on planetary scale distances, but transmission losses due t...
Protecting quantum systems from decoherence with unitary operations
E. Kiktenko, A. Mastiukova, A. Fedorov·Jul 3, 2019
Abstract. Decoherence is a fundamental obstacle to the implementation of large-scale and low-noise quantum information-processing devices. We suggest an approach for suppressing errors by employing preprocessing and postprocessing unitary operations,...
Variational Quantum Circuits for Deep Reinforcement Learning
Samuel Yen-Chi Chen, Chao-Han Huck Yang, Jun Qi +3 more·Jun 30, 2019
The state-of-the-art machine learning approaches are based on classical von Neumann computing architectures and have been widely used in many industrial and academic domains. With the recent development of quantum computing, researchers and tech-gian...
Identification of Time-varying in situ Signals in Quantum Circuits
Xi Cao, Yu-xi Liu, Rebing Wu·Jun 28, 2019
The identification of time-varying in situ signals is crucial for characterizing the dynamics of quantum information processes placed in highly isolated environments. Under certain circumstances, they can be identified from time-resolved measurements...
Resonant shortcuts for adiabatic rapid passage with only z -field control
D. Stefanatos, E. Paspalakis·Jun 27, 2019
In this work we derive ultrafast shortcuts for adiabatic rapid passage for a qubit where the only control variable is the longitudinal $z$ field, while the transverse $x$ field remains constant. This restrictive framework is pertinent to some importa...
Hardware-Efficient Quantum Random Access Memory with Hybrid Quantum Acoustic Systems.
Connor T. Hann, Chang-ling Zou, Yaxing Zhang +4 more·Jun 27, 2019
Hybrid quantum systems in which acoustic resonators couple to superconducting qubits are promising quantum information platforms. High quality factors and small mode volumes make acoustic modes ideal quantum memories, while the qubit-phonon coupling ...
Near-Optimal Error Correcting Code For Ternary Quantum Systems
Ritajit Majumdar, Shridhar Dudam, S. Sur-Kolay +2 more·Jun 26, 2019
Multi-valued quantum systems can store more information than binary ones for a given number of quantum states. For reliable operation of multi-valued quantum systems, error correction is mandated. In this paper, we propose a 6-qutrit quantum error co...
Beyond the Swap Test: Optimal Estimation of Quantum State Overlap.
Marco Fanizza, M. Rosati, M. Skotiniotis +2 more·Jun 25, 2019
We study the estimation of the overlap between two unknown pure quantum states of a finite-dimensional system, given M and N copies of each type. This is a fundamental primitive in quantum information processing that is commonly accomplished from the...
Deterministic generation of a two-dimensional cluster state
M. V. Larsen, Xueshi Guo, Casper R. Breum +2 more·Jun 20, 2019
Generating large-scale cluster states The development of a practical quantum computer requires universality, scalability, and fault tolerance. Although much progress is being made in circuit platforms in which arrays of qubits are addressed and manip...
Ergodicity probes: using time-fluctuations to measure the Hilbert space dimension
C. Nation, D. Porras·Jun 14, 2019
Quantum devices, such as quantum simulators, quantum annealers, and quantum computers, may be exploited to solve problems beyond what is tractable with classical computers. This may be achieved as the Hilbert space available to perform such `calculat...
Observation of information flow in the anti-𝒫𝒯-symmetric system with nuclear spins
Jingwei Wen, Guo-qing Qin, Chao Zheng +4 more·Jun 12, 2019
The recently theoretical and experimental researches on PT\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\od...