Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Towards a NISQ Algorithm to Simulate Hermitian Matrix Exponentiation
Keren Li·May 28, 2021
A practical fault-tolerant quantum computer is worth looking forward to as it provides applications that outperform their known classical counterparts. However, millions of interacting qubits with stringent criteria are required, which is intractable...
Engineering fast bias-preserving gates on stabilized cat qubits
Qiang-Da Xu, Joseph K. Iverson, F. Brandão +1 more·May 28, 2021
Stabilized cat codes can provide a biased noise channel with a set of bias-preserving (BP) gates, which can significantly reduce the resource overhead for fault-tolerant quantum computing. All existing schemes of BP gates, however, require adiabatic ...
Wave-Shape-Tolerant Photonic Quantum Gates.
Ihar Babushkin, A. Demircan, M. Kues +1 more·May 28, 2021
Photons, acting as "flying qubits" in propagation geometries such as waveguides, appear unavoidably in the form of wave packets (pulses). The actual shape of the photonic wave packet as well as possible temporal and spectral correlations between the ...
Phase-state duality in reversible circuit design
M. Amy, N. J. Ross·May 27, 2021
The reversible implementation of classical functions accounts for the bulk of most known quantum algorithms. As a result, a number of reversible circuit constructions over the Clifford+$T$ gate set have been developed in recent years which use both t...
Hybrid Exchange–Measurement-Based Qubit Operations in Semiconductor Double-Quantum-Dot Qubits
M. Brooks, C. Tahan·May 26, 2021
Measurement-based quantum computing (MBQC) promises natural compatibility with quantum error correcting codes at the cost of a polynomial increase in physical qubits. MBQC proposals have largely focused on photonic systems, where 2-qubit gates are di...
Quantum Approximate Optimization Algorithm with Adaptive Bias Fields
Yunlong Yu, Chenfeng Cao, C. Dewey +3 more·May 25, 2021
The quantum approximate optimization algorithm (QAOA) transforms a simple many-qubit wavefunction into one which encodes a solution to a difficult classical optimization problem. It does this by optimizing the schedule according to which two unitary ...
Quantum Embedding Search for Quantum Machine Learning
N. Nguyen, Kwang-Cheng Chen·May 25, 2021
This paper introduces an automated search algorithm (QES, pronounced as “quest”), which derives optimal design of entangling layout for supervised quantum machine learning. First, we establish the connection between the structures of entanglement usi...
Crosstalk analysis for single-qubit and two-qubit gates in spin qubit arrays
Irina Heinz, G. Burkard·May 21, 2021
Scaling up spin qubit systems requires high-fidelity single-qubit and two-qubit gates. Gate fidelities exceeding $98%$ were already demonstrated in silicon-based single and double quantum dots, whereas for the realization of larger qubit arrays, cros...
Local and Global Quantum Gates
L. Weng·May 20, 2021
New theories on local p-adic and global adelic quantum gates are developed. In particular, the corresponding universality properties are established using only finitely many local/global quantum gates. 1 Quantum Computing Motivated by the theory of q...
Many-body quantum chaos and dual-unitarity round-a-face.
T. Prosen·May 17, 2021
We propose a new type of locally interacting quantum circuits-quantum cellular automata-that are generated by unitary interactions round-a-face (IRF). Specifically, we discuss a set (or manifold) of dual-unitary IRFs with local Hilbert space dimensio...
Quantum error reduction with deep neural network applied at the post-processing stage
A. Zhukov, W. Pogosov·May 17, 2021
Deep neural networks (DNN) can be applied at the post-processing stage for the improvement of the results of quantum computations on noisy intermediate-scale quantum (NISQ) processors. Here, we propose a method based on this idea, which is most suita...
Testing complementarity on a transmon quantum processor
P. M. Q. Cruz, J. Fern'andez-Rossier·May 17, 2021
We propose quantum circuits to test interferometric complementarity using symmetric two-way interferometers coupled to a which-path detector. First, we consider the two-qubit setup in which the controlled transfer of path information to the detector ...
Quantum dot-based high-fidelity universal quantum gates in noisy environment
Y. Tiwari, Aditya Dev, V. Poonia·May 14, 2021
Quantum dot-based spin qubit realization is one of the most promising quantum computing systems owing to its integrability with classical computation hardware and its versatility in realizing qubits and quantum gates. In this work, we investigate a q...
Benchmarking near-term quantum devices with the variational quantum eigensolver and the Lipkin-Meshkov-Glick model
K. Robbins, P. Love·May 14, 2021
The Variational Quantum Eigensolver (VQE) is a promising algorithm for Noisy Intermediate Scale Quantum (NISQ) computation. Verification and validation of NISQ algorithms' performance on NISQ devices is an important task. We consider the exactly-diag...
Multiplexed quantum repeaters based on dual-species trapped-ion systems
Prajit Dhara, N. Linke, E. Waks +2 more·May 14, 2021
Trapped ions form an advanced technology platform for quantum information processing with long qubit coherence times, high-fidelity quantum logic gates, optically active qubits, and a potential to scale up in size while preserving a high level of con...
Numerical hardware-efficient variational quantum simulation of a soliton solution
A. Kardashin, A. Pervishko, J. Biamonte +1 more·May 13, 2021
Implementing variational quantum algorithms with noisy intermediate-scale quantum machines of up to a hundred qubits is nowadays considered as one of the most promising routes towards achieving a quantum practical advantage. In multiqubit circuits, r...
Implementing Quantum Finite Automata Algorithms on Noisy Devices
Utku Birkan, Özlem Salehi, Viktor Olejar +2 more·May 13, 2021
Quantum finite automata (QFAs) literature offers an alternative mathematical model for studying quantum systems with finite memory. As a superiority of quantum computing, QFAs have been shown exponentially more succinct on certain problems such as re...
Fast black-box quantum state preparation based on linear combination of unitaries
Shengbin Wang, Zhimin Wang, G. Cui +6 more·May 13, 2021
Black-box quantum state preparation is a fundamental primitive in quantum algorithms. Starting from Grover, a series of techniques have been devised to reduce the complexity. In this work, we propose to perform black-box state preparation using the t...
Parity Quantum Optimization: Benchmarks
M. Fellner, K. Ender, R. T. Hoeven +1 more·May 13, 2021
We present benchmarks of the parity transformation for the Quantum Approximate Optimization Algorithm (QAOA). We analyse the gate resources required to implement a single QAOA cycle for real-world scenarios. In particular, we consider random spin mod...
Prime number factorization using a spinor Bose–Einstein condensate-inspired topological quantum computer
Emil Génetay Johansen, T. Simula·May 12, 2021
Inspired by non-abelian vortex anyons in spinor Bose–Einstein condensates, we consider the quantum double D(Q8)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \use...