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Live trends in quantum computing research, updated daily from arXiv.
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Visualizing dynamics of charges and strings in (2 + 1)D lattice gauge theories
T. Cochran, B. Jobst, Eliot Rosenberg +189 more·Sep 25, 2024
Lattice gauge theories (LGTs)1, 2, 3–4 can be used to understand a wide range of phenomena, from elementary particle scattering in high-energy physics to effective descriptions of many-body interactions in materials5, 6–7. Studying dynamical properti...
Deep Circuit Compression for Quantum Dynamics via Tensor Networks
J. Gibbs, Lukasz Cincio·Sep 24, 2024
Dynamic quantum simulation is a leading application for achieving quantum advantage. However, high circuit depths remain a limiting factor on near-term quantum hardware. We present a compilation algorithm based on Matrix Product Operators for generat...
Generic and scalable differential-equation solver for quantum scientific computing
Jinhwan Sul, Yan Wang·Sep 24, 2024
One of the most important topics in quantum scientific computing is solving differential equations. In this paper, generalized quantum functional expansion (QFE) framework is proposed. In the QFE framework, a functional expansion of solution is encod...
Scalable quantum dynamics compilation via quantum machine learning
Yuxuan Zhang, R. Wiersema, J. Carrasquilla +2 more·Sep 24, 2024
Quantum dynamics compilation is an important task for improving quantum simulation efficiency: It aims to synthesize multi-qubit target dynamics into a circuit consisting of as few elementary gates as possible. Compared to deterministic methods such ...
Phonon Dephasing, Entanglement and Exchange-Only Toffoli Gate Sequence in Quantum Dot Spin Chains
Guanjie He·Sep 23, 2024
The quantum dot spin chain system is vital for quantum simulation and studying collective electron behaviors, necessitating an understanding of its mechanisms and control protocols. Chapter 1 introduces key concepts, focusing on the extended Hubbard ...
QueenV2: Future of Quantum Circuit Simulation
Chuan-Chi Wang·Sep 23, 2024
A state vector-based quantum circuit simulation can provide accurate results for the development and validation of quantum computing algorithms, without being affected by noise interference. However, existing quantum circuit simulators have consisten...
Experimental Simulation of Two Pulses and Three Pulses Coherent One Way Quantum Key Distribution Protocol in Noisy/Noiseless and Wired/Wireless Environment
A. Roy, Arpita Maitra, S. Pal·Sep 23, 2024
Due to the rapid advancement of quantum technology, the traditional established classical cryptographic protocols are no longer secure. To make the world quantum safe, different quantum protocols have been taken into account. Quantum Key Distribution...
Geometric Phase Transition of the Three-Dimensional Z_{2} Lattice Gauge Model.
Ramgopal Agrawal, L. Cugliandolo, L. Faoro +2 more·Sep 23, 2024
After fifty years of lattice gauge theories (LGTs), the nature of the transition between their topological phases (confinement or deconfinement) remains challenging due to the absence of a local order parameter. In this work, we conduct a percolation...
Quantum Computing for Automotive Applications: From Algorithms to Applications
B. G. Q. T. -. C. A. Riofr'io, Johannes Klepsch, Jernej Rudi Finžgar +6 more·Sep 21, 2024
Quantum computing could impact various industries, with the automotive industry with many computational challenges, from optimizing supply chains and manufacturing to vehicle engineering, being particularly promising. This chapter investigates state-...
Efficient Measurement-Driven Eigenenergy Estimation with Classical Shadows
Yizhi Shen, Alex Buzali, Hong-Ye Hu +4 more·Sep 20, 2024
Quantum algorithms exploiting real-time evolution under a target Hamiltonian have demonstrated remarkable efficiency in extracting key spectral information. However, the broader potential of these methods, particularly beyond ground state calculation...
Efficient fault-tolerant code switching via one-way transversal CNOT gates
Sascha Heußen, J. Hilder·Sep 20, 2024
Code switching is an established technique that facilitates a universal set of FT quantum gate operations by combining two QEC codes with complementary sets of gates, which each by themselves are easy to implement fault-tolerantly. In this work, we p...
Asymmetry Control in a Parametric Oscillator for the Quantum Simulation of Chemical Activation
Alejandro Cros Carrillo de Albornoz, Rodrigo G. Cortiñas, Max Schäfer +8 more·Sep 19, 2024
Dissipative tunneling remains a cornerstone effect in quantum mechanics. In chemistry, it plays a crucial role in governing the rates of chemical reactions, often modeled as the motion along the reaction coordinate from one potential well to another....
Solving Combinatorial Optimization Problems on a Photonic Quantum Computer
M. Slysz, K. Kurowski, Grzegorz Walig'ora·Sep 19, 2024
Combinatorial optimization problems pose significant computational challenges across various fields, from logistics to cryptography. Traditional computational methods often struggle with their exponential complexity, motivating exploration into alter...
Resource Management and Circuit Scheduling for Distributed Quantum Computing Interconnect Networks
S. Bahrani, R. Oliveira, J. Parra-Ullauri +2 more·Sep 19, 2024
Distributed quantum computing (DQC) has emerged as a promising approach to overcome the scalability limitations of monolithic quantum processors in terms of computational capability. However, realising the full potential of DQC requires effective res...
Efficient computation of topological order
Louis Fraatz, Amit Jamadagni, H. Weimer·Sep 19, 2024
We analyze the computational aspects of detecting topological order in a quantum many-body system. We contrast the widely used topological entanglement entropy with a recently introduced operational definition for topological order based on error cor...
Stability and Loop Models from Decohering Non-Abelian Topological Order.
Pablo Sala, R. Verresen·Sep 18, 2024
Decohering topological order (TO) is central to the many-body physics of open quantum matter and decoding transitions. We identify statistical mechanical models for decohering non-Abelian TOs, which have been crucial for understanding the error thres...
Rapid Initial-State Preparation for the Quantum Simulation of Strongly Correlated Molecules
Dominic W. Berry, Yu Tong, T. Khattar +10 more·Sep 18, 2024
Studies on quantum algorithms for ground-state energy estimation often assume perfect ground-state preparation; however, in reality the initial state will have imperfect overlap with the true ground state. Here, we address that problem in two ways: b...
Compressing Hamiltonians with ab initio downfolding for simulating strongly-correlated materials on quantum computers
Antonios M. Alvertis, Abid Khan, N. Tubman·Sep 18, 2024
The accurate first-principles description of strongly-correlated materials is an important and challenging problem in condensed matter physics. Ab initio downfolding has emerged as a way of deriving compressed many-body Hamiltonians that maintain the...
QUBO-based SVM for credit card fraud detection on a real QPU
Ettore Canonici, Filippo Caruso·Sep 18, 2024
Among all the physical platforms for the realization of a Quantum Processing Unit (QPU), neutral atom devices are emerging as one of the main players. Their scalability, long coherence times, and the absence of manufacturing errors make them a viable...
Shifting sands of hardware and software in exascale quantum mechanical simulations
Ravindra Shinde, C. Filippi, A. Scemama +1 more·Sep 18, 2024
The era of exascale computing presents both exciting opportunities and unique challenges for quantum mechanical simulations. Although the transition from petaflops to exascale computing has been marked by a steady increase in computational power, it ...