Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Simulation of the five-qubit quantum error correction code on superconducting qubits
I. A. Simakov, I. S. Besedin, A. V. Ustinov·Jul 14, 2021
Experimental realization of stabilizer-based quantum error correction (QEC) codes that would yield superior logical qubit performance is one of the formidable task for state-of-the-art quantum processors. A major obstacle towards realizing this goal ...
Exciton-polariton dynamics of the single site-controlled quantum dot-nanocavity in the coexisting strong-weak coupling regime
Jiahui Huang, Wei Liu, M. Sarihan +6 more·Jul 14, 2021
Deterministic positioning single site-controlled high symmetric InGaAs quantum dots (QDs) in (111)B-oriented GaAs photonic crystal cavities with nanometer-scale accuracy provides an idea component for building integrated quantum photonic circuits. Ho...
Designing Kerr Interactions for Quantum Information Processing via Counterrotating Terms of Asymmetric Josephson-Junction Loops
Timo Hillmann, Fernando Quijandr'ia·Jul 14, 2021
Continuous-variable systems realized in high-coherence microwave cavities are a promising platform for quantum information processing. While strong dynamic nonlinear interactions are desired to implement fast and high-fidelity quantum operations, sta...
Variational quantum simulation of thermal statistical states on a superconducting quantum processer
X. Guo 郭, S. Li 李, Xiao 骁 Xiao 效 +11 more·Jul 13, 2021
Quantum computers promise to solve finite-temperature properties of quantum many-body systems, which is generally challenging for classical computers due to high computational complexities. Here, we report experimental preparations of Gibbs states an...
Full control of superconducting qubits with combined on-chip microwave and flux lines
R. Manenti, E. Sete, Angela Q. Chen +7 more·Jul 13, 2021
As the field of quantum computing progresses to larger-scale devices, multiplexing will be crucial to scale quantum processors. While multiplexed readout is common practice for superconducting devices, relatively little work has been reported about t...
Mixer-phaser Ansätze for quantum optimization with hard constraints
Ryan Larose, E. Rieffel, D. Venturelli·Jul 13, 2021
We introduce multiple parametrized circuit ansätze and present the results of a numerical study comparing their performance with a standard Quantum Alternating Operator Ansatz approach. The ansätze are inspired by mixing and phase separation in the Q...
Fault-Tolerant Parity Readout on a Shuttling-Based Trapped-Ion Quantum Computer
J. Hilder, D. Pijn, O. Onishchenko +7 more·Jul 13, 2021
Quantum error correction requires the detection of errors by reliable measurements of suitable multi-qubit correlation operators. Here, we experimentally demonstrate a fault-tolerant weight-4 parity check measurement scheme. An additional ’flag’ qubit...
Success of digital adiabatic simulation with large Trotter step
Chang-Rui Yi·Jul 13, 2021
The simulation of adiabatic evolution has deep connections with Adiabatic Quantum Computation, the Quantum Approximate Optimization Algorithm and adiabatic state preparation. Here we address the error analysis problem in quantum simulation of adiabat...
Low Rate Protograph-Based LDPC Codes for Continuous Variable Quantum Key Distribution
Kadir Gümüş, L. Schmalen·Jul 13, 2021
Error correction plays a major role in the reconciliation of continuous variable quantum key distribution (CV-QKD) and greatly affects the performance of the system. CV- QKD requires error correction codes of extremely low rates and high reconciliati...
Sustainability of Global Economy as a Quantum Circuit
A. Bonan·Jul 13, 2021
In economy, viewed as a quantum system working as a circuit, each process at the microscale is a quantum gate among agents. The global configuration of economy is addressed by optimizing the sustainability of the whole circuit. This is done in terms ...
Study of using Quantum Computer to Solve Poisson Equation in Gate Insulators
Hector Jose Morrell, H. Wong·Jul 13, 2021
In this paper, the application of quantum computing (QC) in solving gate insulator Poisson equation is studied, through QC simulator and hardware in IBM. Various gate insulator stacks with and without fixed charges are studied. It is found that by in...
Partially Concatenated Calderbank-Shor-Steane Codes Achieving the Quantum Gilbert-Varshamov Bound Asymptotically
Jihao Fan, Jun Li, Ya Wang +3 more·Jul 12, 2021
In this paper, we utilize a concatenation scheme to construct new families of quantum error correction codes achieving the quantum Gilbert-Varshamov (GV) bound asymptotically. Weconcatenate alternant codes with any linear code achievingthe classical ...
Quantum Radon Transforms and Their Applications
Guangsheng Ma, Hongbo Li, Jiman Zhao·Jul 12, 2021
This article extends the Radon transform, a classical image-processing tool for fast tomography and denoising, to the quantum computing platform. A new kind of periodic discrete Radon transform (PDRT), called the quantum periodic discrete Radon trans...
Quantum Approximate Optimization Algorithm Based Maximum Likelihood Detection
Jingjing Cui, Yifeng Xiong, S. Ng +1 more·Jul 11, 2021
Recent advances in quantum technologies pave the way for noisy intermediate-scale quantum (NISQ) devices, where the quantum approximation optimization algorithm (QAOA) constitutes a promising candidate for demonstrating tangible quantum advantages ba...
Heisenberg-limited quantum phase estimation of multiple eigenvalues with few control qubits
Alicja Dutkiewicz, B. Terhal, T. O’Brien·Jul 9, 2021
Quantum phase estimation is a cornerstone in quantum algorithm design, allowing for the inference of eigenvalues of exponentially-large sparse matrices.The maximum rate at which these eigenvalues may be learned, –known as the Heisenberg limit–, is co...
Antenna Array Thinning Through Quantum Computing
P. Rocca, N. Anselmi, G. Oliveri +2 more·Jul 9, 2021
Thinning antenna arrays through quantum Fourier transform (QFT) is proposed. Given the lattice of the candidate locations for the array elements, the problem of selecting which antenna location has to be either occupied or not by an array element is ...
Experimental Simulation of Open Quantum System Dynamics via Trotterization.
Jiaxiu Han, W. Cai, Ling Hu +8 more·Jul 9, 2021
Digital quantum simulators provide a diversified tool for solving the evolution of quantum systems with complicated Hamiltonians and hold great potential for a wide range of applications. Although much attention is paid to the unitary evolution of cl...
Implementable hybrid quantum ant colony optimization algorithm
Mikel Garcia de Andoin, J. Echanobe·Jul 8, 2021
We propose a new hybrid quantum algorithm based on the classical Ant Colony Optimization algorithm to produce approximate solutions for NP-hard problems, in particular optimization problems. First, we discuss some previously proposed Quantum Ant Colo...
Quantum Local Search with the Quantum Alternating Operator Ansatz
T. Tomesh, Zain Saleem, Martin Suchara·Jul 8, 2021
We present a new hybrid, local search algorithm for quantum approximate optimization of constrained combinatorial optimization problems. We focus on the Maximum Independent Set problem and demonstrate the ability of quantum local search to solve larg...
Optical reconstruction of the collective density matrix of a qutrit
Marek Kopciuch, S. Pustelny·Jul 8, 2021
Reconstruction of a quantum state is of prime importance for quantum-information science. Specifically, means of efficient determination of a state of atoms of room-temperature vapor may enable applications in quantum computations and cryptography. T...