Papers
Live trends in quantum computing research, updated daily from arXiv.
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Cavity magnonics with domain walls in insulating ferromagnetic wires
M. Trif, Y. Tserkovnyak·Jan 6, 2024
Magnetic domain walls (DWs) are topological defects that exhibit robust low-energy modes that can be harnessed for classical and neuromorphic computing. However, the quantum nature of these modes has been elusive thus far. Using the language of cavit...
Multipartite entanglement classes of a multiport beam-splitter
F. E. S. Steinhoff·Jan 5, 2024
The states generated by a multiport beam-splitter usually display genuine multipartite entanglement between the many spatial modes. Here we investigate the different classes of multipartite entangled states that arise in this practical situation, wor...
Lock-free de Bruijn graph
Daniel G'orniak, Robert Nowak·Jan 5, 2024
De Bruijn graph is one of the most important data structures used in de-novo genome assembly algorithms, especially for NGS data. There is a growing need for parallel data structures and algorithms due to the increasing number of cores in modern comp...
Ground state energy and magnetization curve of a frustrated magnetic system from real-time evolution on a digital quantum processor
A. Szasz, Ed Younis, W. A. Jong·Jan 5, 2024
Models of interacting many-body quantum systems that may realize new exotic phases of matter, notably quantum spin liquids, are challenging to study using even state-of-the-art classical methods such as tensor network simulations. Quantum computing p...
Ultrahigh-fidelity spatial mode quantum gates in high-dimensional space by diffractive deep neural networks
Qianke Wang, Jun Liu, Dawei Lyu +1 more·Jan 5, 2024
While the spatial mode of photons is widely used in quantum cryptography, its potential for quantum computation remains largely unexplored. Here, we showcase the use of the multi-dimensional spatial mode of photons to construct a series of high-dimen...
Nearly optimal quasienergy estimation and eigenstate preparation of time-periodic Hamiltonians by Sambe space formalism
Kaoru Mizuta·Jan 5, 2024
Time-periodic (Floquet) systems are one of the most interesting nonequilibrium systems. As the computation of energy eigenvalues and eigenstates of time-independent Hamiltonians is a central problem in both classical and quantum computation, quasiene...
Digital–analog quantum learning on Rydberg atom arrays
Jonathan Z Lu, Lucy Jiao, Kristina Wolinski +6 more·Jan 5, 2024
We propose hybrid digital–analog (DA) learning algorithms on Rydberg atom arrays, combining the potentially practical utility and near-term realizability of quantum learning with the rapidly scaling architectures of neutral atoms. Our construction re...
Loop Feynman integration on a quantum computer
Jorge J. Martínez de Lejarza, Leandro Cieri, M. Grossi +2 more·Jan 5, 2024
This work investigates in detail the performance and advantages of a new quantum Monte Carlo integrator, dubbed quantum Fourier iterative amplitude estimation (QFIAE), to numerically evaluate for the first time loop Feynman integrals in a near-term q...
Quantum Approximate Optimisation for Not-All-Equal SAT
A. El-Kadi, R. Bondesan·Jan 5, 2024
Establishing quantum advantage for variational quantum algorithms is an important direction in quantum computing. In this work, we apply the Quantum Approximate Optimisation Algorithm (QAOA) -- a popular variational quantum algorithm for general comb...
A noise-limiting quantum algorithm using mid-circuit measurements for dynamical correlations at infinite temperature
Etienne Granet, Henrik Dreyer·Jan 4, 2024
It is generally considered that the signal output by a quantum circuit is attenuated exponentially fast in the number of gates. This letter explores how algorithms using mid-circuit measurements and classical conditioning as computational tools (and ...
Near-Optimal Performance of Quantum Error Correction Codes.
Guo Zheng, Wenhao He, Gideon Lee +1 more·Jan 4, 2024
The Knill-Laflamme conditions distinguish exact quantum error correction codes, and they have played a critical role in the discovery of state-of-the-art codes. However, the family of exact codes is a very restrictive one and does not necessarily con...
One-step implementation of a nonadiabatic geometric fSim gate in superconducting circuits
Meng-Ru Yun, Zheng Shan, L. Sun +4 more·Jan 4, 2024
Due to its significant application in reducing algorithm depth, fSim gates have attracted a lot of attention. However, during the implementation of quantum gates, fluctuations in control parameters and decoherence caused by the environment may lead t...
Matrix product state ansatz for the variational quantum solution of the Heisenberg model on Kagome geometries
Younes Javanmard, Ugne Liaubaite, Tobias J. Osborne +2 more·Jan 4, 2024
The Variational Quantum Eigensolver (VQE) algorithm, as applied to finding the ground state of a Hamiltonian, is particularly well-suited for deployment on noisy intermediate-scale quantum (NISQ) devices. Here, we utilize the VQE algorithm with a qua...
Coherent Quantum Speed Limits
Xuhui Xiao, Hai Wang, Xingze Qiu·Jan 3, 2024
We establish a comprehensive theoretical framework for coherent quantum speed limits (QSLs), deriving fundamental bounds on the rate of quantum evolution that explicitly isolate the contribution of quantum coherence. By applying Hölder's inequality f...
Exploring many-body interactions through quantum Fisher information
P. Cieśliński, P. Kurzyński, T. Sowi'nski +2 more·Jan 3, 2024
The investigation of many-body interactions holds significant importance in both quantum foundations and information. Hamiltonians coupling multiple particles at once, beyond others, can lead to a faster entanglement generation, multiqubit gate imple...
Robust Quantum Gates against Correlated Noise in Integrated Quantum Chips.
Kangyuan Yi, Yong-Ju Hai, Kai Luo +9 more·Jan 3, 2024
As quantum circuits become more integrated and complex, additional error sources that were previously insignificant start to emerge. Consequently, the fidelity of quantum gates benchmarked under pristine conditions falls short of predicting their per...
To Wedge Or Not To Wedge, Wedges and operator reconstructability in toy models of AdS/CFT
V. Linden·Jan 2, 2024
The AdS/CFT correspondence is an explicit realization of the holographic principle relating a theory of gravity in a volume of space to a lower dimensional quantum field theory on its boundary. By exploiting elements of quantum error correction, qubi...
Quantum State Preparation Using an Exact CNOT Synthesis Formulation
Hanyu Wang, Daniel Bochen Tan, Jason Cong +1 more·Jan 2, 2024
Minimizing the use of CNOT gates in quantum state preparation is a crucial step in quantum compilation, as they introduce coupling constraints and more noise than single-qubit gates. Reducing the number of CNOT gates can lead to more efficient and ac...
Differentiable Quantum Architecture Search For Job Shop Scheduling Problem
Yize Sun, Jiarui Liu, Yunpu Ma +1 more·Jan 2, 2024
The Job shop scheduling problem (JSSP) plays a pivotal role in industrial applications, such as signal processing (SP) and steel manufacturing, involving sequencing machines and jobs to maximize scheduling efficiency. Before, JSSP was solved using ma...
Quantum multiple gray scale images encryption scheme in the bit plane representation model
Claire I. Levaillant·Jan 1, 2024
After introducing a bit-plane quantum representation for a multi-image, we present a novel way to encrypt/decrypt multiple images using a quantum computer. Our encryption scheme is based on a two-stage scrambling of the images and of the bit planes o...