Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Partially Fault-Tolerant Quantum Computing Architecture with Error-Corrected Clifford Gates and Space-Time Efficient Analog Rotations
Yutaro Akahoshi, Kazunori Maruyama, H. Oshima +2 more·Mar 23, 2023
Quantum computers are expected to bring drastic acceleration to several computing tasks against classical computers. Noisy intermediate-scale quantum (NISQ) devices, which have tens to hundreds of noisy physical qubits, are gradually becoming availab...
GSQAS: Graph Self-supervised Quantum Architecture Search
Zhimin He, Maijie Deng, Shenggen Zheng +2 more·Mar 22, 2023
Quantum Architecture Search (QAS) is a promising approach to designing quantum circuits for variational quantum algorithms (VQAs). However, existing QAS algorithms require to evaluate a large number of quantum circuits during the search process, whic...
Using Differential Evolution to avoid local minima in Variational Quantum Algorithms
Daniel Faílde, José Daniel Viqueira, Mariamo Mussa Juane +1 more·Mar 21, 2023
Variational Quantum Algorithms (VQAs) are among the most promising NISQ-era algorithms for harnessing quantum computing in diverse fields. However, the underlying optimization processes within these algorithms usually deal with local minima and barre...
Resource-Dependent Complexity of Quantum Channels
Roy Araiza, Yidong Chen, Marius Junge +1 more·Mar 20, 2023
We introduce a new framework for quantifying the complexity of quantum channels, grounded in a suitably chosen resource set. This class of convex functions is designed to analyze the complexity of both open and closed quantum systems. By leveraging L...
Opening the Black Box inside Grover’s Algorithm
E. Stoudenmire, X. Waintal·Mar 20, 2023
Grover’s algorithm is one of the primary algorithms offered as evidence that quantum computers can provide an advantage over classical computers. It involves an “oracle” (external quantum subroutine), which must be specified for a given application a...
TenCirChem: An Efficient Quantum Computational Chemistry Package for the NISQ Era.
Weitang Li, J. Allcock, Lixue Cheng +5 more·Mar 20, 2023
TenCirChem is an open-source Python library for simulating variational quantum algorithms for quantum computational chemistry. TenCirChem shows high-performance in the simulation of unitary coupled-cluster circuits, using compact representations of q...
Variational Gibbs state preparation on noisy intermediate-scale quantum devices
M. Consiglio, J. Settino, Andrea Giordano +6 more·Mar 20, 2023
The preparation of an equilibrium thermal state of a quantum many-body system on noisy intermediate-scale quantum (NISQ) devices is an important task in order to extend the range of applications of quantum computation. Faithful Gibbs state preparatio...
Efficient site-resolved imaging and spin-state detection in dynamic two-dimensional ion crystals
R. Wolf, Joseph H. Pham, Julian Y. Z. Jee +2 more·Mar 20, 2023
Resolving the locations and discriminating the spin states of individual trapped ions with high fidelity is critical for a large class of applications in quantum computing, simulation, and sensing. We report on a method for high-fidelity state discri...
Clifford-based Circuit Cutting for Quantum Simulation
Kaitlin N. Smith, M. Perlin, P. Gokhale +5 more·Mar 19, 2023
Quantum computing has potential to provide exponential speedups over classical computing for many important applications. However, today's quantum computers are in their early stages, and hardware quality issues hinder the scale of program execution....
Fano-qubits for quantum devices with enhanced isolation and bandwidth
Deepanshu Trivedi, L. Belostotski, A. Madanayake +1 more·Mar 17, 2023
Quantum devices often suffer from reflections and noise during readout, a problem traditionally addressed by magneto-optical isolators and circulators. However, these solutions are hindered by limited bandwidth, low tunability, high losses, and incom...
Calculation of the energies of the multideterminant states of the nitrogen vacancy center in diamond with quantum Monte Carlo
K. Simula, I. Makkonen·Mar 17, 2023
Certain point defects in solids can efficiently be used as qubits for applications in quantum technology. They have spin states that are initializable, readable, robust, and can be manipulated optically. New theoretical methods are needed to find the...
Molecular electronic structure calculation via a quantum computer
H. Naeij, Erfan Mahmoudi, Hossein Davoodi Yeganeh +1 more·Mar 17, 2023
Quantum computers can be used to calculate the electronic structure and estimate the ground state energy of many-electron molecular systems. In the present study, we implement the Variational Quantum Eigensolver (VQE) algorithm, as a hybrid quantum-c...
Estimating Coherent Contributions to the Error Profile Using Cycle Error Reconstruction
Arnaud Carignan-Dugas, S. Ranu, P. Dreher·Mar 17, 2023
Mitigation and calibration schemes are central to maximize the computational reach of today's Noisy Intermediate Scale Quantum (NISQ) hardware, but these schemes are often specialized to exclusively address either coherent or decoherent error sources...
Quantum Monte Carlo simulations for financial risk analytics: scenario generation for equity, rate, and credit risk factors
T. Matsakos, Stuart A. Nield·Mar 16, 2023
Monte Carlo (MC) simulations are widely used in financial risk management, from estimating value-at-risk (VaR) to pricing over-the-counter derivatives. However, they come at a significant computational cost due to the number of scenarios required for...
Quantum Circuit Simulation by SGEMM Emulation on Tensor Cores and Automatic Precision Selection
Hiryuki Ootomo, Hidetaka Manabe, K. Harada +1 more·Mar 15, 2023
Quantum circuit simulation provides the foundation for the development of quantum algorithms and the verification of quantum supremacy. Among the various methods for quantum circuit simulation, tensor network contraction has been increasing in popula...
Convergence and Quantum Advantage of Trotterized MERA for Strongly-Correlated Systems
Q. Miao, T. Barthel·Mar 15, 2023
Strongly-correlated quantum many-body systems are difficult to study and simulate classically. We recently proposed a variational quantum eigensolver (VQE) based on the multiscale entanglement renormalization ansatz (MERA) with tensors constrained to...
Fermion-qudit quantum processors for simulating lattice gauge theories with matter
T. Zache, Daniel Gonz'alez-Cuadra, P. Zoller·Mar 15, 2023
Simulating the real-time dynamics of lattice gauge theories, underlying the Standard Model of particle physics, is a notoriously difficult problem where quantum simulators can provide a practical advantage over classical approaches. In this work, we ...
Leveraging hardware-control imperfections for error mitigation via generalized quantum subspace
Yasuhiro Ohkura, Suguru Endo, Takahiko Satoh +2 more·Mar 14, 2023
In the era of quantum computing without full fault-tolerance, it is essential to suppress noise effects via the quantum error mitigation techniques to enhance the computational power of the quantum devices. One of the most effective noise-agnostic er...
Training variational quantum algorithms with random gate activation
Shuo Liu, Shi-Xin Zhang, Shao-Kai Jian +1 more·Mar 14, 2023
Variational quantum algorithms (VQAs) hold great potentials for near-term applications and are promising to achieve quantum advantage on practical tasks. However, VQAs suffer from severe barren plateau problem as well as have a large probability of b...
Scalable Program Implementation and Simulation of the Large-Scale Quantum Algorithm: $1024\times 1024$ Quantum Linear Solver and Beyond
Zhao-Yun Chen, Cheng Xue, Xi-Ning Zhuang +5 more·Mar 13, 2023
Program implementation and simulation are essential for research in the field of quantum algorithms. However, complex and large-scale quantum algorithms can pose challenges for existing quantum programming languages and simulators. Here, we present a...