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 Case for Noisy Shallow Gate-based Circuits in Quantum Machine Learning
Patrick Selig, Niall Murphy, Ashwin Sundareswaran R +2 more·Nov 1, 2021
There is increasing interest in the development of gate- based quantum circuits for the training of machine learning models. Yet, little is understood concerning the parameters of circuit design, and the effects of noise and other measurement errors ...
Enabling a Programming Environment for an Experimental Ion Trap Quantum Testbed
Austin J. Adams, Elton Pinto, Jeffrey Young +4 more·Oct 30, 2021
Ion trap quantum hardware promises to provide a computational advantage over classical computing for specific problem spaces while also providing an alternative hardware implementation path to cryogenic quantum systems as typified by IBM's quantum ha...
Platform tailored codesign of gate-based quantum simulation
K. Seetharam, Dries Sels, E. Demler·Oct 29, 2021
The utility of near-term quantum computers and simulators is likely to rely upon software-hardware codesign, with error-aware algorithms and protocols optimized for the platforms they are run on. Here, we show how knowledge of noise in a system can b...
The effect of quantum noise on algorithmic perfect quantum state transfer on NISQ processors
D. Babukhin, W. Pogosov·Oct 28, 2021
Quantum walks are an analog of classical random walks in quantum systems. Quantum walks have smaller hitting times compared to classical random walks on certain types of graphs, leading to a quantum advantage of quantum-walks-based algorithms. An imp...
QuantumNAT: Quantum Noise-Aware Training with Noise Injection, Quantization and Normalization
Hanrui Wang, Jiaqi Gu, Yongshan Ding +4 more·Oct 21, 2021
Parameterized Quantum Circuits (PQC) are promising towards quantum advantage on near-term quantum hardware. However, due to the large quantum noises (errors), the performance of PQC models has a severe degradation on real quantum devices. Take Quantu...
Efficient Decoding of Surface Code Syndromes for Error Correction in Quantum Computing
Debasmita Bhoumik, Pinaki Sen, Ritajit Majumdar +3 more·Oct 21, 2021
Errors in surface code have typically been decoded by Minimum Weight Perfect Matching (MWPM) based method. Recently, neural-network-based Machine Learning (ML) techniques have been employed for this purpose. Here we propose a two-level (low and high)...
Simulability transitions in continuous-time dynamics of local open quantum systems
Rahul Trivedi, J. Cirac·Oct 20, 2021
We analyze the complexity of classically simulating continuous-time dynamics of locally interacting quantum spin systems with a constant rate of entanglement breaking noise. We prove that a polynomial time classical algorithm can be used to sample fr...
A Logarithmic Bayesian Approach to Quantum Error Detection
Ian Convy, K. B. Whaley·Oct 20, 2021
We consider the problem of continuous quantum error correction from a Bayesian perspective, proposing a pair of digital filters using logarithmic probabilities that are able to achieve near-optimal performance on a three-qubit bit-flip code, while st...
Machine learning for continuous quantum error correction on superconducting qubits
Ian Convy, Haoran Liao, Song Zhang +5 more·Oct 20, 2021
Continuous quantum error correction has been found to have certain advantages over discrete quantum error correction, such as a reduction in hardware resources and the elimination of error mechanisms introduced by having entangling gates and ancilla ...
Quantum face recognition protocol with ghost imaging
V. Salari, Dilip Paneru, E. Saglamyurek +6 more·Oct 19, 2021
Face recognition is one of the most ubiquitous examples of pattern recognition in machine learning, with numerous applications in security, access control, and law enforcement, among many others. Pattern recognition with classical algorithms requires...
Toward reliability in the NISQ era: Robust interval guarantee for quantum measurements on approximate states
Maurice Weber, A. Anand, Alba Cervera-Lierta +6 more·Oct 19, 2021
Near-term quantum computation holds potential across multiple application domains. However, imperfect preparation and evolution of states due to algorithmic and experimental shortcomings, characteristic in the near-term implementation, would typicall...
Graph-theoretic approach to quantum error correction
Robert Vandermolen, D. Wright·Oct 16, 2021
We investigate a novel class of quantum error correcting codes to correct errors on both qubits and higher-state quantum systems represented as qudits. These codes arise from an original graph-theoretic representation of sets of quantum errors. In th...
FPGA-based electronic system for the control and readout of superconducting quantum processors.
Yuchen Yang, Z. Shen, Xing Zhu +6 more·Oct 15, 2021
Electronic systems for qubit control and measurement serve as a bridge between quantum programming language and quantum information processors. With the rapid development of superconducting quantum circuit technology, synchronization in a large-scale...
Performance of a Kinetic Inductance Traveling-Wave Parametric Amplifier at 4 Kelvin: Toward an Alternative to Semiconductor Amplifiers.
M. Malnou, J. Aumentado, M. Vissers +4 more·Oct 15, 2021
Most microwave readout architectures in quantum computing or sensing rely on a semiconductor amplifier at 4 K, typically a high-electron mobility transistor (HEMT). Despite its remarkable noise performance, a conventional HEMT dissipates several mill...
Large scale multi-node simulations of $\mathbb{Z}_2$ gauge theory quantum circuits using Google Cloud Platform
Erik J. Gustafson, B. Holzman, J. Kowalkowski +14 more·Oct 14, 2021
Simulating quantum field theories on a quantum computer is one of the most exciting fundamental physics applications of quantum information science. Dynamical time evolution of quantum fields is a challenge that is beyond the capabilities of classica...
Observability of fidelity decay at the Lyapunov rate in few-qubit quantum simulations
M. D. Porter, I. Joseph·Oct 14, 2021
In certain regimes, the fidelity of quantum states will decay at a rate set by the classical Lyapunov exponent. This serves both as one of the most important examples of the quantum-classical correspondence principle and as an accurate test for the p...
A Theory of Quantum Subspace Diagonalization
Ethan N. Epperly, Lin Lin, Y. Nakatsukasa·Oct 14, 2021
Quantum subspace diagonalization methods are an exciting new class of algorithms for solving large\rev{-}scale eigenvalue problems using quantum computers. Unfortunately, these methods require the solution of an ill-conditioned generalized eigenvalue...
Characterizing Quantum Instruments: From Nondemolition Measurements to Quantum Error Correction
R. Stricker, D. Vodola, A. Erhard +7 more·Oct 13, 2021
In quantum information processing quantum operations are often processed alongside measurements which result in classical data. Due to the information gain of classical measurement outputs non-unitary dynamical processes can take place on the system,...
New construction of nine-qubit error-correcting code
Long Huang, Xiaohua Wu·Oct 11, 2021
We report new construction of nine-qubit error-correcting code, which introduces two new nine-qubit codes and one new three-qubit code. Because both the new two nine-qubit codes have the normal logical operators, as opposed to the nine-qubit Shor cod...
Depth Optimized Ansatz Circuit in QAOA for Max-Cut
Ritajit Majumdar, Debasmita Bhoumik, Dhiraj Madan +3 more·Oct 9, 2021
While a Quantum Approximate Optimization Algorithm (QAOA) is intended to provide a quantum advantage in finding approximate solutions to combinatorial optimization problems, noise in the system is a hurdle in exploiting its full potential. Several er...