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Live trends in quantum computing research, updated daily from arXiv.
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Entanglement-assisted phase-estimation algorithm for calculating dynamical response functions
Rei Sakuma, Shutaroh Kanno, Kenji Sugisaki +2 more·Apr 30, 2024
Dynamical response functions are fundamental quantities to describe the excited-state properties in quantum many-body systems. Quantum algorithms have been proposed to evaluate these quantities by means of quantum phase estimation (QPE), where the en...
Weighted Feedback-Based Quantum Algorithm for Excited States Calculation
Salahuddin Abdul Rahman, Özkan Karabacak, Rafael Wisniewski·Apr 30, 2024
Drawing inspiration from the Lyapunov control technique for quantum systems, feedback-based quantum al-gorithms have been proposed for calculating the ground states of Hamiltonians. In this work, we consider extending these algorithms to tackle calcu...
Expanding the Horizon: Enabling Hybrid Quantum Transfer Learning for Long-Tailed Chest X-Ray Classification
Sk Chan, Pranav Kulkarni, P. Yi +1 more·Apr 30, 2024
Quantum machine learning (QML) has the potential for improving the multi-label classification of rare, albeit critical, diseases in large-scale chest x-ray (CXR) datasets due to theoretical quantum advantages over classical machine learning (CML) in ...
Light cone cancellation for variational quantum eigensolver in solving noisy Max-Cut
Xinwei Lee, Xinjian Yan, Ningyi Xie +5 more·Apr 30, 2024
Variational Quantum Eigensolver (VQE) is a quantum-classical hybrid algorithm used to estimate the ground energy of a given Hamiltonian. It consists of a parameterized quantum circuit, which the parameters are optimized using a classical optimizer. W...
Fast Quantum Process Tomography via Riemannian Gradient Descent
Daniel Volya, Andrey Nikitin, Prabhat Mishra·Apr 29, 2024
Constrained optimization plays a crucial role in the fields of quantum physics and quantum information science and becomes especially challenging for high-dimensional complex structure problems. One specific issue is that of quantum process tomograph...
Spin coupling is all you need: Encoding strong electron correlation in molecules on quantum computers
Daniel Marti-Dafcik, Hugh G. A. Burton, David P. Tew·Apr 29, 2024
The performance of quantum algorithms for eigenvalue problems, such as computing Hamiltonian spectra, depends strongly on the overlap of the initial wave function and the target eigenvector. In a basis of Slater determinants, the representation of en...
An Early Investigation of the HHL Quantum Linear Solver for Scientific Applications
Muqing Zheng, Chenxu Liu, S. Stein +4 more·Apr 29, 2024
In this paper, we explore using the Harrow–Hassidim–Lloyd (HHL) algorithm to address scientific and engineering problems through quantum computing, utilizing the NWQSim simulation package on a high-performance computing platform. Focusing on domains ...
A diverse set of two-qubit gates for spin qubits in semiconductor quantum dots
M. Ni, Rong-Long Ma, Zhen-Zhen Kong +11 more·Apr 29, 2024
To realize large-scale quantum information processes, an ideal scheme for two-qubit operations should enable diverse operations with given hardware and physical interaction. However, for spin qubits in semiconductor quantum dots, the common two-qubit...
The impact of noise on the simulation of NMR spectroscopy on NISQ devices
A. Khedri, Pascal Stadler, Kirsten Bark +5 more·Apr 29, 2024
With the surge of quantum computing platforms that continue to push the boundaries of capabilities of noisy intermediate-scale quantum computers, there is a growing interest in finding relevant applications and quantifying the corresponding error bud...
Demonstration of system-bath physics on a gate-based quantum computer
Pascal Stadler, Matteo Lodi, A. Khedri +5 more·Apr 29, 2024
Algorithmic cooling can be used to find correlated states of many-body quantum systems. It is based on quantum circuits that perform nonunitary operations, whose implementation can be challenging on near-term quantum computers. In this work we develo...
Revisiting Majumdar-Ghosh spin chain model and Max-cut problem using variational quantum algorithms
Britant, Anirban Pathak·Apr 28, 2024
In this work, energy levels of the Majumdar-Ghosh model (MGM) are analyzed up to 15 spins chain in the noisy intermediate-scale quantum framework using noisy simulations. This is a useful model whose exact solution is known for a particular choice of...
Exploiting many-body localization for scalable variational quantum simulation
Chenfeng Cao, Yeqing Zhou, Swamit Tannu +2 more·Apr 26, 2024
Variational quantum algorithms (VQAs) represent a promising pathway toward achieving practical quantum advantage on near-term hardware. Despite this promise, for generic, expressive ansätze, their scalability is critically hindered by barren plateaus...
Toward a 2D Local Implementation of Quantum Low-Density Parity-Check Codes
Noah F. Berthusen, Dhruv Devulapalli, E. Schoute +4 more·Apr 26, 2024
Geometric locality is an important theoretical and practical factor for quantum low-density parity-check (qLDPC) codes that affects code performance and ease of physical realization. For device architectures restricted to two-dimensional (2D) local g...
Compiler for Distributed Quantum Computing: A Reinforcement Learning Approach
Panagiotis Promponas, Akrit Mudvari, Luca Della Chiesa +3 more·Apr 25, 2024
The practical realization of quantum programs that require large-scale qubit systems is hindered by current technological limitations. Distributed Quantum Computing (DQC) presents a viable path to scalability by interconnecting multiple Quantum Proce...
Stable Symmetry-Protected Topological Phases in Systems with Heralded Noise.
Sanket Chirame, Fiona J. Burnell, Sarang Gopalakrishnan +1 more·Apr 25, 2024
We present a family of local quantum channels whose steady states exhibit stable mixed-state symmetry-protected topological (SPT) order. Motivated by recent experimental progress on "erasure conversion" techniques that allow one to identify (herald) ...
Stabilizing quantum simulations of lattice gauge theories by dissipation
Tobias Schmale, H. Weimer·Apr 25, 2024
Simulations of lattice gauge theories on noisy quantum hardware inherently suffer from violations of the gauge symmetry due to coherent and incoherent errors of the underlying physical system that implements the simulation. These gauge violations cau...
Benchmarking a heuristic Floquet adiabatic algorithm for the Max-Cut problem
Etienne Granet, Henrik Dreyer·Apr 24, 2024
According to the adiabatic theorem of quantum mechanics, a system initially in the ground state of a Hamiltonian remains in the ground state if one slowly changes the Hamiltonian. This can be used in principle to solve hard problems on quantum comput...
Simulating unsteady flows on a superconducting quantum processor
Zhaoyuan Meng, Jiarun Zhong, Shibo Xu +24 more·Apr 24, 2024
Recent advancements of quantum technologies have triggered tremendous interest in exploring practical quantum advantage. The simulation of fluid dynamics, a highly challenging problem in classical physics but vital for practical applications, emerges...
Performant near-term quantum combinatorial optimization
Titus Morris, Ananth Kaushik, Martin Roetteler +1 more·Apr 24, 2024
Combinatorial optimization is a promising application for near-term quantum computers, however, identifying performant algorithms suited to noisy quantum hardware remains as an important goal to potentially realizing quantum computational advantages....
Runtime-coherence trade-offs for hybrid SAT-solvers
Vahideh Eshaghian, Soren Wilkening, Johan AAberg +1 more·Apr 23, 2024
Many search-based quantum algorithms that achieve a theoretical speedup are not practically relevant since they require extraordinarily long coherence times, or lack the parallelizability of their classical counterparts.This raises the question of ho...