Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Single-shot preparation of hypergraph product codes via dimension jump
Yifan Hong·Oct 7, 2024
Quantum error correction is a fundamental primitive of fault-tolerant quantum computing. But in order for error correction to proceed, one must first prepare the codespace of the underlying error-correcting code. A popular method for encoding quantum...
Demonstrating real-time and low-latency quantum error correction with superconducting qubits
Laura Caune, Luka Skoric, N. S. Blunt +22 more·Oct 7, 2024
Quantum error correction (QEC) will be essential to achieve the accuracy needed for quantum computers to realise their full potential. The field has seen promising progress with demonstrations of early QEC and real-time decoded experiments. As quantu...
Error mitigation and circuit division for early fault-tolerant quantum phase estimation
Alicja Dutkiewicz, S. Polla, Maximilian Scheurer +3 more·Oct 7, 2024
As fully fault-tolerant quantum computers capable of solving useful problems remain a distant goal, we anticipate an era of"early fault tolerance"where limited error correction is available. We propose a framework for designing early fault-tolerant a...
Quantum Walk Search on Complete Multipartite Graph with Multiple Marked Vertices
Ningxiang Chen, Meng Li, Xiaoming Sun·Oct 7, 2024
Quantum walk is a potent technique for building quantum algorithms. This paper examines the quantum walk search algorithm on complete multipartite graphs with multiple marked vertices, which has not been explored before. Two specific cases of complet...
Gibbs state preparation for commuting Hamiltonian: Mapping to classical Gibbs sampling
Yeongwoo Hwang, Jiaqing Jiang·Oct 7, 2024
Gibbs state preparation, or Gibbs sampling, is a key computational technique extensively used in physics, statistics, and other scientific fields. Recent efforts for designing fast mixing Gibbs samplers for quantum Hamiltonians have largely focused o...
Quantum Approximate Optimization Algorithms for Maxmimum Cut on Low-Girth Graphs
Tongyang Li, Yuexin Su, Ziyi Yang +1 more·Oct 6, 2024
Maximum cut (MaxCut) on graphs is a classic NP-hard problem. In quantum computing, Farhi, Gutmann, and Goldstone proposed the Quantum Approximate Optimization Algorithm (QAOA) for solving the MaxCut problem. Its guarantee on cut fraction (the fractio...
Engineering Si-Qubit MOSFETs: A Phase-Field Modeling Approach Integrating Quantum-Electrostatics at Cryogenic Temperatures
Nilesh Pandey, Dipanjan Basu, Y. Chauhan +2 more·Oct 6, 2024
This study employs advanced phase-field modeling to investigate Si-based qubit MOSFETs, integrating electrostatics and quantum mechanical effects. We adopt a comprehensive modeling approach, utilizing full-wave treatment of the Schrodinger equation s...
Bosonic Quantum Computational Complexity
Ulysse Chabaud, Michael Joseph, Saeed Mehraban +1 more·Oct 5, 2024
Quantum computing involving physical systems with continuous degrees of freedom, such as the quantum states of light, has recently attracted significant interest. However, a well-defined quantum complexity theory for these bosonic computations over i...
A Comparison on Constrain Encoding Methods for Quantum Approximate Optimization Algorithm
Yiwen Liu, Qingyue Jiao, Yiyu Shi +2 more·Oct 5, 2024
The Quantum Approximate Optimization Algorithm (QAOA) represents a significant opportunity for practical quantum computing applications, particularly in the era before error correction is fully realized. This algorithm is especially relevant for addr...
Limited Parallelization in Gate Operations Leads to Higher Space Overhead and Lower Noise Threshold
Sai Sanjay Narayanan, Smita Bagewadi, Avhishek Chatterjee·Oct 5, 2024
In a modern error corrected quantum memory or circuit, parallelization of gate operations is severely restricted due to issues like cross-talk. Hence, there are enough idle qubits not undergoing gate operations either during the computation phase or ...
Succinct Fermion Data Structures
Joseph Carolan, Luke Schaeffer·Oct 5, 2024
Simulating fermionic systems on a quantum computer requires representing fermionic states using qubits. The complexity of many simulation algorithms depends on the complexity of implementing rotations generated by fermionic creation-annihilation oper...
Quantum Kolmogorov-Arnold networks by combining quantum signal processing circuits
A. Daskin·Oct 5, 2024
In this paper, we show that an equivalent implementation of KAN can be done on quantum computers by simply combining quantum signal processing circuits in layers. This provides a powerful and robust path for the applications of KAN on quantum compute...
Applying quantum autoencoders for time series anomaly detection
Robin Frehner, Kurt Stockinger·Oct 5, 2024
Anomaly detection is an important problem with applications in various domains such as fraud detection, pattern recognition, or medical diagnosis. Several algorithms have been introduced using classical computing approaches. However, using quantum co...
Lazy Qubit Reordering for Accelerating Parallel State-Vector-based Quantum Circuit Simulation
Yusuke Teranishi, Shoma Hiraoka, Wataru Mizukami +2 more·Oct 5, 2024
This article proposes two quantum operation scheduling methods for accelerating parallel state-vector-based quantum circuit simulation using multiple graphics processing units (GPUs). The proposed methods reduce all-to-all communication caused by qub...
Universal adapters between quantum LDPC codes
Esha Swaroop, Tomas Jochym-O'Connor, Theodore J. Yoder·Oct 4, 2024
We propose the repetition code adapter as a way to perform joint logical Pauli measurements within a quantum low-density parity check (LDPC) codeblock or between separate such codeblocks, thus providing a flexible tool for fault-tolerant computation ...
Efficient tomography of microwave photonic cluster states
Yoshiki Sunada, Shingo Kono, Jesper Ilves +6 more·Oct 4, 2024
Entanglement among a large number of qubits is a crucial resource for many quantum algorithms. Such many-body states have been efficiently generated by entangling a chain of itinerant photonic qubits in the optical or microwave domain. However, it ha...
Quantum Monte Carlo Integration for Simulation-Based Optimisation
Jingjing Cui, Philippe J.S. de Brouwer, Steven Herbert +7 more·Oct 4, 2024
We investigate the feasibility of integrating quantum algorithms as subroutines of simulation-based optimisation problems with relevance to and potential applications in mathematical finance. To this end, we conduct a thorough analysis of all systema...
Quantum simulation of nonlinear dynamical systems using repeated measurement
J. Andress, Alexander D. Engel, Yuan Shi +1 more·Oct 4, 2024
We present a quantum algorithm based on repeated measurement to solve initial-value problems for nonlinear ordinary differential equations (ODEs), which may be generated from partial differential equations in plasma physics. We map a dynamical system...
A New World in the Depths of Microcrypt: Separating OWSGs and Quantum Money from QEFID
Amit Behera, Giulio Malavolta, T. Morimae +2 more·Oct 4, 2024
While in classical cryptography, one-way functions (OWFs) are widely regarded as the"minimal assumption,"the situation in quantum cryptography is less clear. Recent works have put forward two concurrent candidates for the minimal assumption in quantu...
Quantum circuit complexity for linearly polarised light
E. Curado, S. Faci, J. Gazeau +3 more·Oct 4, 2024
In this study, we explore a form of quantum circuit complexity that extends to open systems. To illustrate our methodology, we focus on a basic model where the projective Hilbert space of states is depicted by the set of orientations in the Euclidean...