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Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum State Learning Implies Circuit Lower Bounds
Nai-Hui Chia, Daniel Liang, Fang Song·May 16, 2024
We establish connections between state tomography, pseudorandomness, quantum state synthesis, and circuit lower bounds. In particular, let $\mathfrak{C}$ be a family of non-uniform quantum circuits of polynomial size and suppose that there exists an ...
Partially unitary learning.
Mikhail Gennadievich Belov, V. G. Malyshkin·May 16, 2024
The problem of an optimal mapping between Hilbert spaces IN of |ψ〉 and OUT of |ϕ〉 based on a set of wavefunction measurements (within a phase) ψ_{l}→ϕ_{l}, l=1,⋯,M, is formulated as an optimization problem maximizing the total fidelity ∑_{l=1}^{M}ω^{...
Compact quantum algorithms for time-dependent differential equations
Sachin S. Bharadwaj, K. Sreenivasan·May 16, 2024
Many claims of computational advantages have been made for quantum computing over classical but they have not been demonstrated for practical problems. Here, we present algorithms for solving time-dependent PDEs, with particular reference to fluid eq...
Optimal Switching Networks for Paired-Egress Bell State Analyzer Pools
Marii Koyama, Claire Yun, Amin Taherkhani +5 more·May 16, 2024
To scale quantum computers to useful levels, we must build networks of quantum computational nodes that can share entanglement for use in distributed forms of quantum algorithms. In one proposed architecture, node-to-node entanglement is created when...
A Recursive Lower Bound on the Energy Improvement of the Quantum Approximate Optimization Algorithm
R. Medina, Maksym Serbyn·May 16, 2024
The Quantum Approximate Optimization Algorithm (QAOA) uses a quantum computer to implement a variational method with $2p$ layers of alternating unitary operators, optimized by a classical computer to minimize a cost function. While rigorous performan...
Architectures and random properties of symplectic quantum circuits
Diego Garc'ia-Mart'in, Paolo Braccia, M. Cerezo·May 16, 2024
Parametrized and random unitary (or orthogonal) n-qubit circuits play a central role in quantum information. As such, one could naturally assume that circuits implementing symplectic transformations would attract similar attention. However, this is n...
Silicon nitride integrated photonics from visible to mid-infrared spectra
K. Buzaverov, A. Baburin, Evgeny V. Sergeev +15 more·May 16, 2024
Recently, silicon nitride (Si3N4) photonic integrated circuits (PICs) are of a great interest due to their extremely low waveguides losses. The number of Si3N4 integrated photonics platform applications is constantly growing including the Internet of...
Corrections to adiabatic behavior for long paths
Thomas D. Cohen, Hyunwoo Oh·May 16, 2024
The cost and the error of the adiabatic theorem for preparing the final eigenstate are discussed in terms of path length. Previous studies in terms of the norm of the Hamiltonian and its derivatives with the spectral gap are limited in their ability ...
Simulation of a feedback-based algorithm for quantum optimization for a realistic neutral-atom system with an optimized small-angle controlled-phase gate
S. X. Li, W. Mu, J. You +1 more·May 16, 2024
In contrast to the classical optimization process required by the quantum approximate optimization algorithm, FALQON, a feedback-based algorithm for quantum optimization [A. B. Magann {\it et al.,} {\color{blue}Phys. Rev. Lett. {\bf129}, 250502 (2022...
Circuit-Based Leakage-to-Erasure Conversion in a Neutral-Atom Quantum Processor
Matthew N. H. Chow, Vikas Buchemmavari, Sivaprasad Omanakuttan +4 more·May 16, 2024
Atom-loss errors are a major limitation of current state-of-the-art neutral-atom quantum computers and pose a significant challenge for scalable systems. In a quantum processor with cesium atoms, we demonstrate proof-of-principle circuit-based conver...
Permutation tests for quantum state identity
Harry Buhrman, Dmitry Grinko, Philip Verduyn Lunel +1 more·May 15, 2024
The quantum analogue of the equality function, known as the quantum state identity problem, is the task of deciding whether $n$ unknown quantum states are equal or unequal, given the promise that all states are either pairwise orthogonal or identical...
Full band-structure calculation of semiconducting materials on a noisy quantum processor
Shaobo Zhang, Akib Karim, H. Quiney +1 more·May 15, 2024
Quantum chemistry is a promising application in the era of quantum computing since the unique effects of quantum mechanics that take exponential growing resources to simulate classically are controllable on quantum computers. Fermionic degrees of fre...
Rapidly Achieving Chemical Accuracy with Quantum Computing Enforced Language Model
Honghui Shang, Xiongzhi Zeng, M. Gong +11 more·May 15, 2024
Finding accurate ground state energy of a many-body system has been a major challenge in quantum chemistry. The integration of classic and quantum computers has shed new light on resolving this outstanding problem. Here we propose QiankunNet-VQE, a t...
Scalable Scheduling Policies for Quantum Satellite Networks
Albert Williams, Nitish K. Panigrahy, Andrew McGregor +1 more·May 15, 2024
As Low Earth Orbit (LEO) satellite mega constellations continue to be deployed for satellite internet and recent successful experiments in satellite-based quantum entanglement distribution emerge, a natural question arises: How should we coordinate t...
Accelerating Decision Diagram-based Multi-node Quantum Simulation with Ring Communication and Automatic SWAP Insertion
Yusuke Kimura, Shaowen Li, Hiroyuki Sato +1 more·May 15, 2024
An N-bit quantum state requires a vector of length 2N, leading to an exponential increase in the required memory with N in conventional statevector-based quantum simulators. A proposed solution to this issue is the decision diagram-based quantum simu...
Hybrid Meta-Solving for Practical Quantum Computing
Domenik Eichhorn, Maximilian Schweikart, Nick Poser +3 more·May 15, 2024
The advent of quantum algorithms has initiated a discourse on the potential for quantum speedups for optimization problems. However, several factors still hinder a practical realization of the potential benefits. These include the lack of advanced, e...
Computable Entanglement Cost under Positive Partial Transpose Operations.
Ludovico Lami, Francesco Anna Mele, Bartosz Regula·May 15, 2024
Quantum information theory is plagued by the problem of regularizations, which require the evaluation of formidable asymptotic quantities. This makes it computationally intractable to gain a precise quantitative understanding of the ultimate efficien...
Exploring ground states of Fermi-Hubbard model on honeycomb lattices with counterdiabaticity
Jialiang Tang, Ruoqian Xu, Yongcheng Ding +6 more·May 15, 2024
Exploring the ground state properties of many-body quantum systems conventionally involves adiabatic processes, alongside exact diagonalization, in the context of quantum annealing or adiabatic quantum computation. Shortcuts to adiabaticity by counte...
Toward a linear-ramp QAOA protocol: evidence of a scaling advantage in solving some combinatorial optimization problems
J. A. Montañez-Barrera, K. Michielsen·May 15, 2024
The quantum approximate optimization algorithm (QAOA) is a promising algorithm for solving combinatorial optimization problems (COPs), with performance governed by variational parameters {γi,βi}i=0p−1\documentclass[12pt]{minimal} \usepackage{amsmath}...
Quantum Computing Education for Computer Science Students: Bridging the Gap with Layered Learning and Intuitive Analogies
Anila Mjeda, Hazel Murray·May 15, 2024
Quantum computing presents a transformative potential for the world of computing. However, integrating this technology into the curriculum for computer science students who lack prior exposure to quantum mechanics and advanced mathematics remains a c...