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
Optimizing Clifford gate generation for measurement-only topological quantum computation with Majorana zero modes
Alan Tran, Alex Bocharov, B. Bauer +1 more·Sep 6, 2019
One of the main challenges for quantum computation is that while the number of gates required to perform a non-trivial quantum computation may be very large, decoherence and errors in realistic quantum architectures limit the number of physical gate ...
Analytical Model and Topology Evaluation of Quantum Secure Communication Network
Qiong Li, Yaxing Wang, Haokun Mao +2 more·Sep 5, 2019
Due to the intrinsic point-to-point feature of quantum key distribution system, it is inevitable to study and develop the Quantum Secure Communication Network (QSCN) technology to provide security communication service for a large-scale of nodes over...
Transitionless phonon assisted photon-qubit quantum state transfer in a hybrid optomechanical system
A. Saha, A. Sarma·Sep 5, 2019
Quantum state transfer is crucial for quantum information processing and quantum computation. Here, we propose a hybrid optomechanical system capable of coupling a qubit, an optical mode and a mechanical oscillator. The displacement of the mechanical...
Quantum Natural Gradient
J. Stokes, J. Izaac, N. Killoran +1 more·Sep 4, 2019
A quantum generalization of Natural Gradient Descent is presented as part of a general-purpose optimization framework for variational quantum circuits. The optimization dynamics is interpreted as moving in the steepest descent direction with respect ...
Experimental demonstration of memory-enhanced quantum communication
M. Bhaskar, R. Riedinger, B. Machielse +8 more·Sep 3, 2019
The ability to communicate quantum information over long distances is of central importance in quantum science and engineering1. Although some applications of quantum communication such as secure quantum key distribution2,3 are already being successf...
Area law of noncritical ground states in 1D long-range interacting systems
Tomotaka Kuwahara, Keiji Saito·Aug 30, 2019
The area law for entanglement provides one of the most important connections between information theory and quantum many-body physics. It is not only related to the universality of quantum phases, but also to efficient numerical simulations in the gr...
Classifying single-qubit noise using machine learning
Travis L. Scholten, Yi-Kai Liu, Kevin C. Young +1 more·Aug 30, 2019
Quantum characterization, validation, and verification (QCVV) techniques are used to probe, characterize, diagnose, and detect errors in quantum information processors (QIPs). An important component of any QCVV protocol is a mapping from experimental...
Entropy Gain and Information Loss by Measurements.
Xingrong Wang·Aug 28, 2019
When the von Neumann entropy of a quantum system is increased by measurements, part of its information is lost. To faithfully reflect such a gain-loss relation, we propose the Information Retrievability (IR) and Information Loss (IL), which depend on...
Detecting crosstalk errors in quantum information processors
M. Sarovar, T. Proctor, K. Rudinger +3 more·Aug 26, 2019
Crosstalk occurs in most quantum computing systems with more than one qubit. It can cause a variety of correlated and nonlocal crosstalk errors that can be especially harmful to fault-tolerant quantum error correction, which generally relies on error...
Holographic Code Rate
N. Bray-Ali, David Chester, Dugan Hammock +3 more·Aug 25, 2019
Holographic codes grown with perfect tensors on regular hyperbolic tessellations using an inflation rule protect quantum information stored in the bulk from errors on the boundary provided the code rate is less than one. Hyperbolic geometry bounds th...
Conditional teleportation of quantum-dot spin states
Haifeng Qiao, Y. Kandel, S. Manikandan +5 more·Aug 22, 2019
Among the different platforms for quantum information processing, individual electron spins in semiconductor quantum dots stand out for their long coherence times and potential for scalable fabrication. The past years have witnessed substantial progr...
Optimal control for the quantum simulation of nuclear dynamics
E. Holland, K. Wendt, K. Kravvaris +6 more·Aug 22, 2019
We propose a method for enacting the unitary time propagation of two interacting neutrons at leading order of chiral effective-field theory by efficiently encoding the nuclear dynamics into a single multilevel quantum device. The emulated output of t...
Minimal degenerate CSS quantum code with low cost circuit
Ritajit Majumdar, S. Sur-Kolay·Aug 20, 2019
Error correction is of utmost necessity for large-scale quantum computing. Quantum error correcting codes can be degenerate, if more than one type of error can map the input state to the same error state. In this paper, we propose a 6-qubit degenerat...
Continuous-Variable Quantum Key Distribution with Rateless Reconciliation Protocol
Chao Zhou, Xiangyu Wang, Yichen Zhang +3 more·Aug 13, 2019
Information reconciliation is crucial for continuous-variable quantum key distribution (CV-QKD) because its performance affects the secret key rate and maximal secure transmission distance. Fixed-rate error correction codes limit the potential applic...
Designing pretty good state transfer via isospectral reductions
M. Röntgen, N. Palaiodimopoulos, C. Morfonios +4 more·Aug 6, 2019
We present an algorithm to design networks that feature pretty good state transfer (PGST), which is of interest for high-fidelity transfer of information in quantum computing. Realizations of PGST networks have so far mostly relied either on very spe...
Quantum Error Correction with the GKP Code and Concatenation with Stabilizer Codes
Yang Wang·Jul 31, 2019
Gottesman, Kitaev and Preskill have proposed a scheme to encode a qubit in a harmonic oscillator, which is called the GKP code. It is designed to be resistant to small shift errors contained in momentum and position quadratures. Thus there's some int...
Efficient Estimation of Pauli Channels
S. Flammia, Joel J. Wallman·Jul 30, 2019
Pauli channels are ubiquitous in quantum information, both as a dominant noise source in many computing architectures and as a practical model for analyzing error correction and fault tolerance. Here, we prove several results on efficiently learning ...
Quantum error correction of a qubit encoded in grid states of an oscillator
P. Campagne-Ibarcq, A. Eickbusch, S. Touzard +10 more·Jul 29, 2019
The accuracy of logical operations on quantum bits (qubits) must be improved for quantum computers to outperform classical ones in useful tasks. One method to achieve this is quantum error correction (QEC), which prevents noise in the underlying syst...
Modular quantum computation in a trapped ion system
Kuan Zhang, Jayne Thompson, Xiang Zhang +7 more·Jul 29, 2019
Modern computation relies crucially on modular architectures, breaking a complex algorithm into self-contained subroutines. A client can then call upon a remote server to implement parts of the computation independently via an application programming...
Entanglement of genuinely entangled subspaces and states: Exact, approximate, and numerical results
M. Demianowicz, R. Augusiak·Jul 29, 2019
Genuinely entangled subspaces (GESs) are those subspaces of multipartite Hilbert spaces that consist only of genuinely multiparty entangled pure states. They are natural generalizations of the well-known notion of completely entangled subspaces , whi...