Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Approximate real-time evolution operator for potential with one ancillary qubit and application to first-quantized Hamiltonian simulation
Xinchi Huang, Taichi Kosugi, Hirofumi Nishi +1 more·Jul 23, 2024
In many quantum algorithms, including Hamiltonian simulation, efficient quantum circuit implementation of diagonal unitary matrices is an important issue. For small unitary diagonal matrices, a method based on Walsh operators is known and allows an e...
A quantum leaky integrate-and-fire spiking neuron and network
D. Brand, Francesco Petruccione·Jul 23, 2024
Quantum machine learning is in a period of rapid development and discovery, however it still lacks the resources and diversity of computational models of its classical complement. With the growing difficulties of classical models requiring extreme ha...
One-Dimensional Quantum Dot Array Integrated with Charge Sensors in an InAs Nanowire.
Yi Luo, Xiao-Fei Liu, Zhi-Hai Liu +8 more·Jul 22, 2024
We report an experimental study of a 1D quintuple-quantum-dot array integrated with two charge sensors in an InAs nanowire. The device is studied by measuring double quantum dots formed consecutively in the array, and corresponding charge stability d...
Lower Bound for Simulation Cost of Open Quantum Systems: Lipschitz Continuity Approach
Zhiyan Ding, M. Junge, Philipp Schleich +1 more·Jul 22, 2024
Simulating quantum dynamics is one of the most promising applications of quantum computers. While the upper bound of the simulation cost has been extensively studied through various quantum algorithms, much less work has focused on establishing the l...
Quantum Computing for Phonon Scattering Effects on Thermal Conductivity
Xiangjun Tan·Jul 22, 2024
Recent investigations have demonstrated that multi-phonon scattering processes substantially influence the thermal conductivity of materials, posing significant computational challenges for classical simulations as the complexity of phonon modes esca...
Demonstration of a variational quantum eigensolver with a solid-state spin system under ambient conditions
Xuliang Du, Yang Shen, Zipeng Wu +2 more·Jul 22, 2024
Quantum simulators offer the potential to utilize the quantum nature of a physical system to study another physical system. In contrast to conventional simulation, which experiences an exponential increase in computational complexity, quantum simulat...
Subspace-Based Local Compilation of Variational Quantum Circuits for Large-Scale Quantum Many-Body Simulation
S. Kanasugi, Yuichiro Hidaka, Yuya O. Nakagawa +5 more·Jul 19, 2024
Simulation of quantum many-body systems is a promising application of quantum computers. However, implementing the time-evolution operator as a quantum circuit efficiently on near-term devices with limited resources is challenging. Standard approache...
Thermal pure states for systems with antiunitary symmetries and their tensor network representations
Yasushi Yoneta·Jul 19, 2024
Thermal pure state algorithms, which employ pure quantum states representing thermal equilibrium states instead of statistical ensembles, are useful both for numerical simulations and for theoretical analysis of thermal states. However, their inheren...
An Efficient Quantum Euclidean Similarity Algorithm for Worldwide Localization
A. Shokry, Moustafa Youssef·Jul 19, 2024
Fingerprinting techniques are widely used for localization because of their accuracy, especially in the presence of wireless channel noise. However, the fingerprinting techniques require significant storage and running time, which is a concern when i...
Routing in Quantum Networks with End-to-End Knowledge
Vinay Kumar, Claudio Cicconetti, M. Conti +1 more·Jul 19, 2024
Given the diverse array of physical systems available for quantum computing and the absence of a well‐defined quantum Internet protocol stack, the design and optimisation of quantum networking protocols remain largely unexplored. To address this, the...
Scattering Processes from Quantum Simulation Algorithms for Scalar Field Theories
Andrew Hardy, Priyanka Mukhopadhyay, M. Sohaib Alam +8 more·Jul 18, 2024
We provide practical simulation methods for scalar field theories on a quantum computer that yield improved asymptotics as well as concrete gate estimates for the simulation and physical qubit estimates using the surface code. We achieve these improv...
Multi-stage tomography based on eigenanalysis for high-dimensional dense unitary processes in gate-based quantum computers
Y. Deville, A. Deville·Jul 18, 2024
Quantum Process Tomography (QPT) methods aim at identifying, i.e. estimating, a quantum process. QPT is a major quantum information processing tool, since it especially allows one to experimentally characterize the actual behavior of quantum gates, t...
Qutrit and qubit circuits for three-flavor collective neutrino oscillations
F. Turro, I. Chernyshev, Ramya Bhaskar +1 more·Jul 18, 2024
We explore the utility of qutrits and qubits for simulating the flavor dynamics of dense neutrino systems. The evolution of such systems impacts some important astrophysical processes, such as core-collapse supernovae and the nucleosynthesis of heavy...
SHARC-VQE: Simplified Hamiltonian approach with refinement and correction enabled variational quantum eigensolver for molecular simulation.
Harshdeep Singh, Sonjoy Majumder, Sabyashachi Mishra·Jul 17, 2024
Quantum computing is finding increasingly more applications in quantum chemistry, particularly to simulate electronic structure and molecular properties of simple systems. The transformation of a molecular Hamiltonian from the fermionic space to the ...
CUAOA: A Novel CUDA-Accelerated Simulation Framework for the QAOA
Jonas Stein, Jonas Blenninger, David Bucher +4 more·Jul 17, 2024
The Quantum Approximate Optimization Algorithm (QAOA) is a prominent quantum algorithm designed to find approximate solutions to combinatorial optimization problems, which are challenging for classical computers. In the current era, where quantum har...
Minimally Entangled Typical Thermal States for Classical and Quantum Simulation of 1+1-Dimensional $\mathbb Z_2$ Lattice Gauge Theory at Finite Temperature and Density
I. Chen, João C. Getelina, Kl'ee Pollock +4 more·Jul 16, 2024
Simulating strongly coupled gauge theories at finite temperature and density is a longstanding challenge in nuclear and high-energy physics that also has fundamental implications for condensed matter physics. In this work, we use minimally entangled ...
Improve Variational Quantum Eigensolver by Many-Body Localization
Li Xin, Zhang-qi Yin·Jul 16, 2024
Variational quantum algorithms have been widely demonstrated in both experimental and theoretical contexts to have extensive applications in quantum simulation, optimization, and machine learning. However, the exponential growth in the dimension of t...
Quantum data centres: a simulation-based comparative noise analysis
K. Campbell, M. Razavi, Ahmed Lawey·Jul 15, 2024
Quantum data centres (QDCs) could overcome the scalability challenges of modern quantum computers. Single-processor monolithic quantum computers are affected by increased cross talk and difficulty of implementing gates when the number of qubits is in...
Encoded probabilistic imaginary-time evolution on a trapped-ion quantum computer for ground and excited states of spin qubits
Hirofumi Nishi, Yuki Takei, Taichi Kosugi +4 more·Jul 15, 2024
In this study, we employed a quantum computer to solve a low-energy effective Hamiltonian for spin defects in diamond (so-called NV centre) and wurtzite-type aluminium nitride, which are anticipated to be qubits. The probabilistic imaginary-time evol...
Hybrid Oscillator-Qubit Quantum Processors: Instruction Set Architectures, Abstract Machine Models, and Applications
Yuan Liu, Shraddha Singh, Kevin C. Smith +11 more·Jul 15, 2024
Quantum computing with discrete variable (DV, qubit) hardware is approaching the large scales necessary for computations beyond the reach of classical computers. However, important use cases such as quantum simulations of physical models containing b...