Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Noisy intermediate-scale quantum computing algorithm for solving an n -vertex MaxCut problem with log( n ) qubits
M. Rančić·Oct 20, 2021
Quantum computers are devices, which allow more efficient solutions of problems as compared to their classical counterparts. As the timeline to developing a quantum-error corrected computer is unclear, the quantum computing community has dedicated mu...
Measurement-induced criticality in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="double-struck">Z</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> -symmetric quantum automaton circuits
Yi-Fan Han, Xiao Chen·Oct 20, 2021
We study entanglement dynamics in hybrid $\mathbb{Z}_2$-symmetric quantum automaton circuits subject to local composite measurements. We show that there exists an entanglement phase transition from a volume law phase to a critical phase by varying th...
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...
Microscopic treatment of instantaneous spectral diffusion and its effect on quantum gate fidelities in rare-earth-ion-doped crystals
A. Kinos, L. Rippe, A. Walther +1 more·Oct 19, 2021
The effect of instantaneous spectral diffusion (ISD) on gate operations in rare-earth-ion-doped crystals is an important question to answer for the future of rare-earth quantum computing. Here we present a microscopic modeling that highlights the stoch...
Non-symmetric Pauli spin blockade in a silicon double quantum dot
T. Lundberg, D. J. Ibberson, Jing Li +12 more·Oct 19, 2021
Spin qubits in gate-defined silicon quantum dots are receiving increased attention thanks to their potential for large-scale quantum computing. Readout of such spin qubits is done most accurately and scalably via Pauli spin blockade (PSB), however, v...
Logical fermions for fault-tolerant quantum simulation
A. Landahl, B. Morrison·Oct 19, 2021
We show how to absorb fermionic quantum simulation's expensive fermion-to-qubit mapping overhead into the overhead already incurred by surface-code-based fault-tolerant quantum computing. The key idea is to process information in surface-code twist d...
Near-Optimal Quantum Algorithms for String Problems
Shyan S. Akmal, Ce Jin·Oct 19, 2021
We study quantum algorithms for several fundamental string problems, including Longest Common Substring , Lexicographically Minimal String Rotation , and Longest Square Substring . These problems have been widely studied in the stringology literature...
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...
Realizing Distance-Selective Interactions in a Rydberg-Dressed Atom Array.
Simon Hollerith, K. Srakaew, David Wei +10 more·Oct 19, 2021
Measurement-based quantum computing relies on the rapid creation of large-scale entanglement in a register of stable qubits. Atomic arrays are well suited to store quantum information, and entanglement can be created using highly-excited Rydberg stat...
Tight Bounds on the Spooky Pebble Game: Recycling Qubits with Measurements
Niels Kornerup, J. Sadun, D. Soloveichik·Oct 18, 2021
Pebble games are popular models for analyzing time-space trade-offs. In particular, reversible pebble game strategies are frequently applied in quantum algorithms like Grover's search to efficiently simulate classical computation on inputs in superpo...
Evaluating NISQ Devices with Quadratic Nonresidues
Thomas G. Draper·Oct 18, 2021
We propose a new method for evaluating NISQ devices. This paper has three distinct parts. First, we present a new quantum algorithm that solves a two hundred year old problem of finding quadratic nonresidues (QNR) in polynomial time. We show that QNR...
Classical-To-Quantum Transfer Learning for Spoken Command Recognition Based on Quantum Neural Networks
Jun Qi, Javier Tejedor·Oct 17, 2021
This work investigates an extension of transfer learning applied in machine learning algorithms to the emerging hybrid end-to-end quantum neural network (QNN) for spoken command recognition (SCR). Our QNN-based SCR system is composed of classical and...
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...
Making existing software quantum safe: A case study on IBM Db2
Lei Zhang, A. Miranskyy, Walid Rjaibi +3 more·Oct 16, 2021
The software engineering community is facing challenges from quantum computers (QCs). In the era of quantum computing, Shor's algorithm running on QCs can break asymmetric encryption algorithms that classical computers practically cannot. Though the ...
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...
Efficiently Solve the Max-cut Problem via a Quantum Qubit Rotation Algorithm
Xin Wang·Oct 15, 2021
Optimizing parameterized quantum circuits promises efficient use of near-term quantum computers to achieve the potential quantum advantage. However, there is a notorious tradeoff between the expressibility and trainability of the parameter ansatz. We...
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...
Quantum computational quantification of protein–ligand interactions
Josh J. M. Kirsopp, C. Di Paola, D. Manrique +7 more·Oct 15, 2021
We have demonstrated a prototypical hybrid classical and quantum computational workflow for the quantification of protein-ligand interactions. The workflow combines the Density Matrix Embedding Theory (DMET) embedding procedure with the Variational Q...
Multi-class quantum classifiers with tensor network circuits for quantum phase recognition
M. Lazzarin, D. Galli, E. Prati·Oct 15, 2021
Hybrid quantum-classical algorithms based on variational circuits are a promising approach to quantum machine learning problems for near-term devices, but the selection of the variational ansatz is an open issue. Recently, tensor network-inspired cir...
Development of Quantum Circuits for Perceptron Neural Network Training, Based on the Principles of Grover's Algorithm
C. B. Pronin, A. Ostroukh·Oct 15, 2021
This paper highlights a practical research of the possibility of forming quantum circuits for training neural networks. The demonstrated quantum circuits were based on the principles of Grover's Search Algorithm. The perceptron was chosen as the arch...