Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Finance: a tutorial on quantum computing applied to the financial market
Askery Canabarro, Taysa M. Mendoncca, Ranieri Nery +4 more·Aug 8, 2022
Previously only considered a frontier area of Physics, nowadays quantum computing is one of the fastest growing research field, precisely because of its technological applications in optimization problems, machine learning, information security and s...
Overcoming exponential scaling with system size in Trotter-Suzuki implementations of constrained Hamiltonians: 2+1 U(1) lattice gauge theories
D. Grabowska, Christopher Kane, B. Nachman +1 more·Aug 5, 2022
For many quantum systems of interest, the classical computational cost of simulating their time evolution scales exponentially in the system size. At the same time, quantum computers have been shown to allow for simulations of some of these systems u...
Implementation of photon partial distinguishability in a quantum optical circuit simulation
J. Osca, J. Vala·Aug 5, 2022
We are concerned with numerical simulations of quantum optical circuits under certain realistic conditions, specifically that photon quantum states are not perfectly indistinguishable. The partial photon distinguishability presents a serious limitati...
Neural network accelerator for quantum control
David Xu, A. B. Özgüler, G. D. Guglielmo +4 more·Aug 4, 2022
Efficient quantum control is necessary for practical quantum computing implementations with current technologies. Conventional algorithms for determining optimal control parameters are computationally expensive, largely excluding them from use outsid...
Quantum chemistry simulation of ground- and excited-state properties of the sulfonium cation on a superconducting quantum processor
M. Motta, G. O. Jones, J. Rice +5 more·Aug 4, 2022
The computational description of correlated electronic structure, and particularly of excited states of many-electron systems, is an anticipated application for quantum devices. An important ramification is to determine the dominant molecular fragmen...
Finite-size criticality in fully connected spin models on superconducting quantum hardware.
M. Grossi, Oriel Kiss, Francesco De Luca +3 more·Aug 4, 2022
The emergence of a collective behavior in a many-body system is responsible for the quantum criticality separating different phases of matter. Interacting spin systems in a magnetic field offer a tantalizing opportunity to test different approaches t...
Information-theoretic hardness of out-of-time-order correlators
Jordan S. Cotler, T. Schuster, M. Mohseni·Aug 3, 2022
We establish that there are properties of quantum many-body dynamics which are efficiently learnable if we are given access to out-of-time-order correlators (OTOCs), but which require exponentially many operations in the system size if we can only me...
Quantum approximate optimization algorithm in non-Markovian quantum systems
Bo Yue, Shibei Xue, Yu Pan +1 more·Aug 3, 2022
Although quantum approximate optimization algorithm (QAOA) has demonstrated its quantum supremacy, its performance on Noisy Intermediate-Scale Quantum (NISQ) devices would be influenced by complicated noises, e.g. quantum colored noises. To evaluate ...
Unsupervised quantum machine learning for fraud detection
Oleksandr Kyriienko, E. Magnusson·Aug 2, 2022
We develop quantum protocols for anomaly detection and apply them to the task of credit card fraud detection (FD). First, we establish classical benchmarks based on supervised and unsupervised machine learning methods, where average precision is chos...
Simulating Quantum Circuits Using Efficient Tensor Network Contraction Algorithms with Subexponential Upper Bound.
T. Wahl, Sergii Strelchuk·Aug 2, 2022
We derive a rigorous upper bound on the classical computation time of finite-ranged tensor network contractions in d≥2 dimensions. Consequently, we show that quantum circuits of single-qubit and finite-ranged two-qubit gates can be classically simula...
Conserved charges in the quantum simulation of integrable spin chains
K. Maruyoshi, T. Okuda, Juan W. Pedersen +3 more·Aug 1, 2022
When simulating the time evolution of quantum many-body systems on a digital quantum computer, one faces the challenges of quantum noise and of the Trotter error due to time discretization. For certain spin chains, it is possible to discretize the ti...
Fast-forwarding quantum simulation with real-time quantum Krylov subspace algorithms
C. Cortes, Iii A. Eugene DePrince, S. Gray·Aug 1, 2022
Quantum subspace diagonalization (QSD) algorithms have emerged as a competitive family of algorithms that avoid many of the optimization pitfalls associated with parameterized quantum circuit algorithms. While the vast majority of the QSD algorithms ...
Proposal for sequential Stern–Gerlach experiment with programmable quantum processors
M. Hu 胡, Haixing 海兴 Miao 缪, Y. Zhang 张·Jul 30, 2022
The historical significance of the Stern–Gerlach (SG) experiment lies in its provision of the initial evidence for space quantization. Over time, its sequential form has evolved into an elegant paradigm that effectively illustrates the fundamental pr...
Application of a variational hybrid quantum-classical algorithm to heat conduction equation and analysis of time complexity
Yangyang Liu, Zhen Chen, Chi-Wang Shu +2 more·Jul 29, 2022
The prosperous development of both hardware and algorithms for quantum computing (QC) potentially prompts a paradigm shift in scientific computing in various fields. As an increasingly active topic in QC, the variational quantum algorithm (VQA) leads...
Domain-Specific Quantum Architecture Optimization
Wan-Hsuan Lin, Daniel Bochen Tan, M. Niu +2 more·Jul 29, 2022
With the steady progress in quantum computing over recent years, roadmaps for upscaling quantum processors have relied heavily on the targeted qubit architectures. So far, similarly to the early age of classical computing, these designs have been cra...
Experimental Simulation of Larger Quantum Circuits with Fewer Superconducting Qubits.
C. Ying, Bin Cheng, You-Wei Zhao +14 more·Jul 28, 2022
Although near-term quantum computing devices are still limited by the quantity and quality of qubits in the so-called NISQ era, quantum computational advantage has been experimentally demonstrated. Moreover, hybrid architectures of quantum and classi...
Towards solving the Fermi-Hubbard model via tailored quantum annealers
Ryan Levy, Zoe Gonzalez Izquierdo, Zhihui Wang +8 more·Jul 28, 2022
The Fermi-Hubbard model (FHM) on a two dimensional square lattice has long been an important testbed and target for simulating fermionic Hamiltonians on quantum hardware. We present an alternative for quantum simulation of FHMs based on an adiabatic ...
Simulation of Interaction-Induced Chiral Topological Dynamics on a Digital Quantum Computer.
Jin Ming Koh, Tommy Tai, Ching Hua Lee·Jul 28, 2022
Chiral edge states are highly sought after as paradigmatic topological states relevant to both quantum information processing and dissipationless electron transport. Using superconducting transmon-based quantum computers, we demonstrate chiral topolo...
Quantum critical dynamics in a 5,000-qubit programmable spin glass
A. King, Jack Raymond, T. Lanting +24 more·Jul 27, 2022
Experiments on disordered alloys^ 1 – 3 suggest that spin glasses can be brought into low-energy states faster by annealing quantum fluctuations than by conventional thermal annealing. Owing to the importance of spin glasses as a paradigmatic computa...
Matchgate Shadows for Fermionic Quantum Simulation
Kianna Wan, W. Huggins, Joonho Lee +1 more·Jul 27, 2022
“Classical shadows” are estimators of an unknown quantum state, constructed from suitably distributed random measurements on copies of that state (Huang et al. in Nat Phys 16:1050, 2020, https://doi.org/10.1038/s41567-020-0932-7). In this paper, we a...