Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Approximating dynamical correlation functions with constant depth quantum circuits
Reinis Irmejs, R. A. Santos·Jun 5, 2024
One of the most important quantities characterizing the microscopic properties of quantum systems are dynamical correlation functions. These correlations are obtained by time-evolving a perturbation of an eigenstate of the system, typically the groun...
The Qudit ZH Calculus for Arbitrary Finite Fields: Universality and Application
Dichuan Gao·Jun 4, 2024
We propose a generalization of the graphical ZH calculus to qudits of prime-power dimensions $q = p^t$, implementing field arithmetic in arbitrary finite fields. This is an extension of a previous result by Roy which implemented arithmetic of prime-s...
Quasifragmentation functions in the massive Schwinger model
S. Grieninger, Ismail Zahed·Jun 4, 2024
We introduce the concept of the quark quasifragmentation function (qFF) using an equal-time and spatially boosted form of the Collins-Soper fragmentation function where the out-meson fragment is replaced by the current asymptotic condition. We derive...
Emergence of the Wavefunction of a Non-relativistic Quantum Particle from QFT
Mani L. Bhaumik·Jun 4, 2024
The enormous success of the Standard Model of particle physics has clearly established quantum fields as the fundamental elements of reality of the universe unveiled to us so far. Here we present for the first time a thorough derivation of the wavefu...
Optimization of Decoder Priors for Accurate Quantum Error Correction.
V. Sivak, M. Newman, P. Klimov·Jun 4, 2024
Accurate decoding of quantum error-correcting codes is a crucial ingredient in protecting quantum information from decoherence. It requires characterizing the error channels corrupting the logical quantum state and providing this information as a pri...
Noise-adapted qudit codes for amplitude-damping noise
Sourav Dutta, Debjyoti Biswas, Prabha Mandayam·Jun 4, 2024
Quantum error correction (QEC) plays a critical role in preventing information loss in quantum systems and provides a framework for reliable quantum computation. Identifying quantum codes with nice code parameters for physically motivated noise model...
Demonstration of Erasure Conversion in a Molecular Tweezer Array
Connor M. Holland, Yukai Lu, Samuel J. Li +2 more·Jun 4, 2024
Programmable optical tweezer arrays of molecules are an emerging platform for quantum simulation and quantum information science. For these applications, reducing and mitigating errors that arise during initial state preparation and subsequent evolut...
Entangling Four Logical Qubits beyond Break-Even in a Nonlocal Code.
Yifan Hong, Elijah Durso-Sabina, D. Hayes +1 more·Jun 4, 2024
Quantum error correction protects logical quantum information against environmental decoherence by encoding logical qubits into entangled states of physical qubits. One of the most important near-term challenges in building a scalable quantum compute...
Demonstration of Two-Dimensional Connectivity for a Scalable Error-Corrected Ion-Trap Quantum Processor Architecture
Marco Valentini, M. Mourik, Friederike Butt +11 more·Jun 4, 2024
A major hurdle for building a large-scale quantum computer is increasing the number of qubits while maintaining connectivity between them. In trapped-ion devices, this connectivity can be achieved by moving subregisters consisting of a few ions acros...
Multi-level quantum signal processing with applications to ground state preparation using fast-forwarded Hamiltonian evolution
Yulong Dong, Lin Lin·Jun 4, 2024
The preparation of the ground state of a Hamiltonian $H$ with a large spectral radius has applications in many areas such as electronic structure theory and quantum field theory. Given an initial state with a constant overlap with the ground state, a...
Generalized Cycle Benchmarking Algorithm for Characterizing Midcircuit Measurements
Zhihan Zhang, Senrui Chen, Yunchao Liu +1 more·Jun 4, 2024
Midcircuit measurements (MCMs) are crucial ingredients in the development of fault-tolerant quantum computation. While there have been rapid experimental progresses in realizing MCMs, a systematic method for characterizing noisy MCMs is still under e...
Machine-learning insights into the entanglement-trainability correlation of parametrized quantum circuits
Shikun Zhang, Yang Zhou, Zheng Qin +4 more·Jun 4, 2024
Variational quantum algorithms (VQAs) have emerged as the leading strategy to obtain quantum advantage on the current noisy intermediate-scale devices. However, their entanglement-trainability correlation, as the major reason for the barren plateau (...
Entanglement accelerates quantum simulation
Qi Zhao, You Zhou, Andrew M. Childs·Jun 4, 2024
Quantum entanglement is an essential feature of many-body systems that impacts both quantum information processing and fundamental physics. Classical simulation methods can efficiently simulate many-body states with low entanglement, but struggle as ...
Quantum Computing in Wireless Communications and Networking: A Tutorial-cum-Survey
Wei Zhao, Tangjie Weng, Yue Ruan +4 more·Jun 4, 2024
Owing to its outstanding parallel computing capabilities, quantum computing (QC) has been a subject of continuous attention. With the gradual maturation of QC platforms, it has increasingly played a significant role in various fields such as transpor...
Hybrid Quantum-Classical Convolutional Neural Networks for Image Classification in Multiple Color Spaces
Kwok-Ho Ng, Tingting Song, Zhiquan Liu·Jun 4, 2024
The growing complexity and scale of image processing tasks challenge classical convolutional neural networks (CNNs) with high computational costs. Hybrid quantum-classical convolutional neural networks (HQCNNs) show potential to improve performance b...
Dividing quantum circuits for the time evolution of stochastic processes by orthogonal-series-density estimation
Koichi Miyamoto·Jun 4, 2024
Quantum Monte Carlo integration (QMCI) is a quantum algorithm to estimate expectations of random variables, with applications in various industrial fields such as financial derivative pricing. When QMCI is applied to expectations concerning a stochas...
Computational Power of Random Quantum Circuits in Arbitrary Geometries
M. DeCross, Reza Haghshenas, Minzhao Liu +34 more·Jun 4, 2024
Empirical evidence for a gap between the computational powers of classical and quantum computers has been provided by experiments that sample the output distributions of two-dimensional quantum circuits. Many attempts to close this gap have utilized ...
Integrated error-suppressed pipeline for quantum optimization of nontrivial binary combinatorial optimization problems on gate-model hardware at the 156-qubit scale
Natasha Sachdeva, Gavin S. Hartnett, Smarak Maity +12 more·Jun 3, 2024
We introduce a novel hybrid quantum-classical variational optimization method for unconstrained binary combinatorial optimization problems on gate-model quantum computers, integrating a custom variational ansatz, staged feedback-based dual variationa...
Snowflake: A Distributed Streaming Decoder
Tim Chan·Jun 3, 2024
We design Snowflake, a quantum error correction decoder that, for the surface code under circuit-level noise, is roughly 25% more accurate than the Union-Find decoder, with a better mean runtime scaling: subquadratic as opposed to cubic in the code d...
A time-to-digital converter with steady calibration through single-photon detection
Matías Rubén Bolaños, Daniele Vogrig, Paolo Villoresi +2 more·Jun 3, 2024
Time-to-Digital Converters (TDCs) are a crucial tool in a wide array of fields, in particular for quantum communication, where time taggers performance can severely affect the quality of the entire application. Nowadays, FPGA-based TDCs present a via...