Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Hamiltonian engineering of general two-body spin-1/2 interactions
K. Attar, D. Farfurnik, N. Bar-Gill·Jun 2, 2019
Spin Hamiltonian engineering in solid-state systems plays a key role in a variety of applications ranging from quantum information processing and quantum simulations to novel studies of many-body physics. By analyzing the irreducible form of a genera...
Long-step path-following algorithm for quantum information theory: Some numerical aspects and applications
L. Faybusovich, Cunlu Zhou·May 31, 2019
We consider some important computational aspects of the long-step path-following algorithm developed in our previous work and show that a broad class of complicated optimization problems arising in quantum information theory can be solved using this ...
Revisiting the behavior of quantum correlations under nondissipative decoherence by means of the correlation matrix
D. Bussandri, T. M. Os'an, A. P. Majtey +13 more·May 31, 2019
In this paper we use the Fano representation of two-qubit states from which we can identify a correlation matrix containing the information about the classical and quantum correlations present in the bipartite quantum state. To illustrate the use of ...
Dual-species, multi-qubit logic primitives for Ca+/Sr+ trapped-ion crystals
C. Bruzewicz, R. McConnell, J. Stuart +2 more·May 30, 2019
We demonstrate key multi-qubit quantum-logic primitives in a dual-species trapped-ion system based on $${}^{40}$$40Ca$${}^{+}$$+ and $${}^{88}$$88Sr$${}^{+}$$+ ions, using two optical qubits with quantum-logic-control frequencies in the red to near-i...
Protecting quantum entanglement from leakage and qubit errors via repetitive parity measurements
C. C. Bultink, T. O’Brien, R. Vollmer +9 more·May 29, 2019
We protect two-transmon entanglement from qubit leakage using the same parity checks used to correct standard qubit errors. Protecting quantum information from errors is essential for large-scale quantum computation. Quantum error correction (QEC) en...
Defining Quantum Neural Networks via Quantum Time Evolution
Aditya Dendukuri, B. Keeling, A. Fereidouni +3 more·May 27, 2019
This work presents a novel fundamental algorithm for for defining and training Neural Networks in Quantum Information based on time evolution and the Hamiltonian. Classical Neural Network algorithms (ANN) are computationally expensive. For example, i...
Error correction schemes for fully correlated quantum channels protecting both quantum and classical information
Chi-Kwong Li, Seth Lyles, Y. Poon·May 24, 2019
We study efficient quantum error correction schemes for the fully correlated channel on an n-qubit system with error operators that assume the form σx⊗n\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \use...
Computing scalar products via a two-terminal quantum transmission line
J. Stolze, A. Zenchuk·May 24, 2019
The scalar product of two vectors with $K$ real components can be computed using two quantum channels, that is, information transmission lines in the form of spin-1/2 XX chains. Each channel has its own $K$-qubit sender and both channels share a sing...
Quantum Circuits for Dynamic Runtime Assertions in Quantum Computation
Huiyang Zhou, Gregory T. Byrd·May 24, 2019
In this paper, we propose quantum circuits for runtime assertions, which can be used for both software debugging and error detection. Runtime assertion is challenging in quantum computing for two key reasons. First, a quantum bit (qubit) cannot be co...
Improving security and bandwidth efficiency of NewHope using error-correction schemes
Minki Song, Seunghwan Lee, Eunsang Lee +3 more·May 20, 2019
Among many submissions to the NIST post-quantum cryptography (PQC) project, NewHope is a promising key encapsulation mechanism (KEM) based on the Ring-Learning with errors (Ring-LWE) problem. Since the most important factors to be considered for PQC ...
Spin coherent quantum transport of electrons between defects in diamond
L. Oberg, E. Huang, P. Reddy +6 more·May 17, 2019
Abstract The nitrogen-vacancy (NV) color center in diamond has rapidly emerged as an important solid-state system for quantum information processing. Whereas individual spin registers have been used to implement small-scale diamond quantum computing,...
Generation and manipulation of Schrödinger cat states in Rydberg atom arrays
Ahmed Omran, H. Levine, A. Keesling +16 more·May 14, 2019
Entanglement goes large The success of quantum computing relies on the ability to entangle large-scale systems. Various platforms are being pursued, with architectures based on superconducting qubits and trapped atoms being the most advanced. By enta...
Placing Kirkman's Schoolgirls and Quantum Spin Pairs on the Fano Plane: A Rainbow of Four Primary Colors, A Harmony of Fifteen Tones
J. P. Marceaux, A. Rau·May 14, 2019
A recreational problem from nearly two centuries ago has featured prominently in recent times in the mathematics of designs, codes, and signal processing. The number 15 that is central to the problem coincidentally features in areas of physics, espec...
Data-driven inference and observational completeness of quantum devices
M. Dall’Arno, Asaph Ho, F. Buscemi +1 more·May 13, 2019
Data-driven inference was recently introduced as a protocol that, upon the input of a set of data, outputs a mathematical description for a physical device able to explain the data. The device so inferred is automatically self-consistent, that is, ca...
Programming multi-level quantum gates in disordered computing reservoirs via machine learning
G. Marcucci, D. Pierangeli, P. Pinkse +2 more·May 13, 2019
Novel machine learning computational tools open new perspectives for quantum information systems. Here we adopt the open-source programming library TensorFlow to design multi-level quantum gates, including a computing reservoir represented by a rando...
Quantum Logic Spectroscopy with Ions in Thermal Motion
D. Kienzler, D. Kienzler, Yong Wan +12 more·May 7, 2019
A mixed-species geometric phase gate has been proposed for implementing quantum logic spectroscopy on trapped ions, which combines probe and information transfer from the spectroscopy to the logic ion in a single pulse. We experimentally realize this...
A Ten-Qubit Solid-State Spin Register with Quantum Memory up to One Minute
C. Bradley, J. Randall, M. Abobeih +6 more·May 6, 2019
Spins associated to single defects in solids provide promising qubits for quantum information processing and quantum networks. Recent experiments have demonstrated long coherence times, high-fidelity operations and long-range entanglement. However, c...
On the Entanglement Cost of One-Shot Compression
Shima Bab Hadiashar, A. Nayak·May 6, 2019
We revisit the task of visible compression of an ensemble of quantum states with entanglement assistance in the one-shot setting. The protocols achieving the best compression use many more qubits of shared entanglement than the number of qubits in th...
Efficient Quantum Gates for Individual Nuclear Spin Qubits by Indirect Control.
Swathi S. Hegde, Jingfu Zhang, D. Suter·May 5, 2019
Hybrid quantum registers, such as electron-nuclear spin systems, have emerged as promising hardware for implementing quantum information and computing protocols in scalable systems. Nevertheless, the coherent control of such systems still faces chall...
Computing Quantum Channel Capacities
Navneeth Ramakrishnan, Raban Iten, V. Scholz +1 more·May 3, 2019
The capacity of noisy quantum channels characterizes the highest rate at which information can be reliably transmitted and it is therefore of practical as well as fundamental importance. Capacities of classical channels are computed using alternating...