Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A quantum strategy to compute the jet quenching parameter q^\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hat{q}$$\
J. Barata, C. Salgado·Apr 10, 2021
Jet quenching, the modification of the properties of a QCD jet when the parton cascade takes place inside a medium, is an intrinsically quantum process, where color coherence effects play an essential role. Despite a very significant progress in the ...
Intrinsic and induced quantum quenches for enhancing qubit-based quantum noise spectroscopy
Yu-Xin Wang, A. Clerk·Apr 5, 2021
Quantum sensing protocols that exploit the dephasing of a probe qubit are powerful and ubiquitous methods for interrogating an unknown environment. They have a variety of applications, ranging from noise mitigation in quantum processors, to the study...
Hybrid light-matter networks of Majorana zero modes
L. Contamin, M. Delbecq, B. Douçot +2 more·Mar 30, 2021
Topological excitations, such as Majorana zero modes, are a promising route for encoding quantum information. Topologically protected gates of Majorana qubits, based on their braiding, will require some form of network. Here, we propose to build such...
Heating of a Trapped Ion Induced by Dielectric Materials.
M. Teller, D. Fioretto, P. Holz +8 more·Mar 25, 2021
Electric-field noise due to surfaces disturbs the motion of nearby trapped ions, compromising the fidelity of gate operations that are the basis for quantum computing algorithms. We present a method that predicts the effect of dielectric materials on...
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...
Approximations in Transmon Simulation
Tyler Jones, Kaiah Steven, Xavier Poncini +2 more·Feb 19, 2021
Classical simulations of time-dependent quantum systems are widely used in quantum control research. In particular, these simulations are commonly used to host iterative optimal control algorithms. This is convenient for algorithms that are too onero...
Dynamic compensation of stray electric fields in an ion trap using machine learning and adaptive algorithm
M. Ghadimi, Alexander Zappacosta, J. Scarabel +3 more·Feb 11, 2021
Surface ion traps are among the most promising technologies for scaling up quantum computing machines, but their complicated multi-electrode geometry can make some tasks, including compensation for stray electric fields, challenging both at the level...
Removing leakage-induced correlated errors in superconducting quantum error correction
M. McEwen, D. Kafri, Z. Chen +48 more·Feb 11, 2021
Quantum computing can become scalable through error correction, but logical error rates only decrease with system size when physical errors are sufficiently uncorrelated. During computation, unused high energy levels of the qubits can become excited,...
Ansatz-Independent Variational Quantum Classifiers and the Price of Ansatz
Hideyuki Miyahara, V. Roychowdhury·Feb 2, 2021
The paradigm of variational quantum classifiers (VQCs) encodes classical information as quantum states, followed by quantum processing and then measurements to generate classical predictions. VQCs are promising candidates for efficient utilizations o...
Strong Coupling of an Fe - Co Alloy with Ultralow Damping to Superconducting Co-planar Waveguide Resonators
I. Haygood, M. Pufall, E. Edwards +2 more·Feb 1, 2021
We report on the strong coupling between a metallic ferromagnetic Fe75Co25 thin film patterned element and a range of superconducting Nb half-wavelength co-planar waveguide (CPW) resonators. By varying the volume of the ferromagnet we demonstrate tha...
Experimental realization of nonadiabatic holonomic single‐qubit quantum gates with two dark paths in a trapped ion
Ming-Zhong Ai, Sai Li, Ran He +5 more·Jan 19, 2021
For circuit-based quantum computation, experimental implementation of a universal set of quantum logic gates with high-fidelity and strong robustness is essential and central. Quantum gates induced by geometric phases, which depend only on global pro...
Berry phase induced entanglement of hole-spin qubits in a microwave cavity
M. Wysoki'nski, M. Plodzie'n, M. Trif·Dec 31, 2020
Hole-spins localized in semiconductor structures, such as quantum dots or defects, serve to the realization of efficient gate-tunable solid-state quantum bits. Here we study two electrically driven spin 3/2 holes coupled to the electromagnetic field ...
Multipartite high-dimensional entangled state generation through soliton-induced dynamical Casimir effect on a chip
A. E. Dorche, A. Adibi·Dec 22, 2020
An integrated photonic approach for complex quantum state generation through dynamical Casimir effect (DCE) is demonstrated. This approach provides a scheme to realize multipartite high-dimensional entangled states in the microwave (MW) and terahertz...
Compiler Design for Distributed Quantum Computing
Davide Ferrari, A. Cacciapuoti, M. Amoretti +1 more·Dec 17, 2020
In distributed quantum computing architectures, with the network and communications functionalities provided by the Quantum Internet, remote quantum processing units can communicate and cooperate for executing computational tasks that single, noisy, ...
Optimal quantum simulation of open quantum systems
Pragati Gupta, C. M. Chandrashekar·Dec 14, 2020
Digital quantum simulation on quantum systems require algorithms that can be implemented using finite quantum resources. Recent studies have demonstrated digital quantum simulation of open quantum systems on Noisy Intermediate-Scale Quantum (NISQ) de...
Ultranarrow spectral line of the radiation in double qubit-cavity ultrastrong coupling system.
Teng Zhao, Shao-Ping Wu, Guo-qing Yang +2 more·Oct 30, 2020
The ultrastrongly coupling (USC) system has very important research significance in quantum simulation and quantum computing. In this paper, the ultranarrow spectrum of a circuit QED system with two qubits ultrastrongly coupled to a single-mode cavit...
Hybridization mechanism of the dual proximity effect in superconductor–topological insulator interfaces
N. Sedlmayr, A. Levchenko·Oct 27, 2020
In this communication we consider generalities of the proximity effect in a contact between a conventional $s$-wave superconductor (S) nano-island and a thin film of a topological insulator (TI). A local hybridization coupling mechanism is considered...
Deterministic multi-mode gates on a scalable photonic quantum computing platform
M. V. Larsen, Xueshi Guo, Casper R. Breum +2 more·Oct 27, 2020
Quantum computing can be realized with numerous different hardware platforms and computational protocols. A highly promising, and potentially scalable, idea is to combine a photonic platform with measurement-induced quantum information processing. In...
Automatic post-selection by ancillae thermalization
L. Wright, F. Barratt, J. Dborin +2 more·Oct 8, 2020
Tasks such as classification of data and determining the groundstate of a Hamiltonian cannot be carried out through purely unitary quantum evolution. Instead, the inherent non-unitarity of the measurement process must be harnessed. Post-selection and...
Measurement-induced phase transitions in quantum automaton circuits
J. Iaconis, A. Lucas, Xiao Chen·Oct 5, 2020
We study the entanglement dynamics in a generic quantum automaton circuit subjected to projective measurements. We design an efficient algorithm which not only allows us to perform large scale simulation for the R\'enyi entropy but also provides a ph...