Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Complexity of quantum tomography from genuine non-Gaussian entanglement
Xiaobin Zhao, Pengcheng Liao, Francesco Anna Mele +2 more·Nov 3, 2024
Quantum state tomography typically requires exponentially many copies of a quantum state, due to the complex correlations present in large systems. We show that, for bosonic systems, the scaling is completely determined by the nature of these correla...
Rapidly mixing loop representation quantum Monte Carlo for Heisenberg models on star-like bipartite graphs
Jun Takahashi, Samuel Slezak, E. Crosson·Nov 3, 2024
Quantum Monte Carlo (QMC) methods have proven invaluable in condensed matter physics, particularly for studying ground states and thermal equilibrium properties of quantum Hamiltonians without a sign problem. Over the past decade, significant progres...
Lorentz-Equivariant Quantum Graph Neural Network for High-Energy Physics
Md Abrar Jahin, Md Akmol Masud, Md Wahiduzzaman Suva +2 more·Nov 3, 2024
The rapid data surge from the high-luminosity Large Hadron Collider introduces critical computational challenges requiring novel approaches for efficient data processing in particle physics. Quantum machine learning, with its capability to leverage t...
Electrical Interconnects for Silicon Spin Qubits
Christopher David White, Anthony Sigillito, Michael J. Gullans·Nov 2, 2024
Scalable spin qubit devices will likely require long-range qubit interconnects. We propose to create such an interconnect with a resistive topgate. The topgate is positively biased, to form a channel between the two dots; an end-to-end voltage differ...
Towers of Quantum Many-body Scars from Integrable Boundary States
Kazuyuki Sanada, Yuan Miao, Hosho Katsura·Nov 2, 2024
We construct several models with multiple quantum many-body scars (QMBS) using integrable boundary states (IBS). Specifically, we focus on the tilted Néel states, which are parametrized IBS for the spin-1/2 Heisenberg chain, and show that these state...
Efficient explicit circuit for quantum state preparation of piecewise continuous functions
Nikita Guseynov, Nana Liu·Nov 2, 2024
Efficiently uploading data into quantum states is essential for many quantum algorithms to achieve advantage across various applications. In this paper, we address this challenge by developing a method to upload a polynomial function $f(x)$ on the in...
Quantum CORDIC -- Arcsine on a Budget
Iain Burge, Michel Barbeau, Joaquin Garcia-Alfaro·Nov 2, 2024
This work introduces a quantum algorithm for computing the function arcsine, with arbitrary accuracy. We leverage a technique from embedded computing and Field-Programmable Gate Arrays, called COordinate Rotation DIgital Computer (CORDIC). CORDIC is ...
Neural-Network-Based Design of Approximate Gottesman-Kitaev-Preskill Code.
Yexiong Zeng, Wei Qin, Ye‐Hong Chen +2 more·Nov 2, 2024
Gottesman-Kitaev-Preskill (GKP) encoding holds promise for continuous-variable fault-tolerant quantum computing. While an ideal GKP encoding is abstract and impractical due to its nonphysical nature, approximate versions provide viable alternatives. ...
Noise-aware circuit compilations for a continuously parameterized two-qubit gateset
Christopher Yale, Rich Rines, V. Omole +9 more·Nov 2, 2024
State-of-the-art noisy-intermediate-scale quantum (NISQ) processors are currently implemented across a variety of hardware platforms, each with their own distinct gatesets. As such, circuit compilation should not only be aware of, but also deeply con...
Quantum Token Obfuscation via Superposition
S. M. Y. I. Tomal, Abdullah Al Shafin·Nov 2, 2024
Traditional cryptographic techniques, including token obfuscation, are increasingly vulnerable to quantum attacks due to advancements in quantum computing. Quantum algorithms such as Shor's and Grover's pose significant threats to classical security ...
Intensity correlations in decoy-state BB84 quantum key distribution systems
Daniil Trefilov, Xoel Sixto, Víctor Zapatero +3 more·Nov 1, 2024
The decoy-state method is a prominent approach to enhance the performance of quantum key distribution (QKD) systems that operate with weak coherent laser sources. Due to the limited transmissivity of single photons in optical fiber, current experimen...
Quantum-enhanced sensing of spin-orbit coupling without fine tuning
Bin Yi, Abolfazl Bayat, Saubhik Sarkar·Nov 1, 2024
Spin-orbit coupling plays an important role in both fundamental physics and technological applications. Precise estimation of the spin-orbit coupling is necessary for accurate designing across various physical setups such as solid state devices and q...
Application of the Quantum Approximate Optimization Algorithm in Solving the Total Domination Problem
Haoqian Pan, H. Yuan, Yang Liu +3 more·Nov 1, 2024
Recent advancements in quantum computing have spurred substantial research into the application of quantum algorithms to combinatorial optimization problems. Among these challenges, the Total Domination Problem (TDP) emerges as a classic and critical...
Fusing matrix-product states with quantum Monte Carlo: reducing entanglement and sign problem at the same time
Gunnar Bollmark, Sam Mardazad, Johannes S. Hofmann +1 more·Nov 1, 2024
Systems of correlated quantum matter can be a steep challenge to any would-be method of solution. Matrix-product state (MPS)-based methods can describe 1D systems quasiexactly, but often struggle to retain sufficient bipartite entanglement to accurat...
Pauli Transfer Matrices
Lukas Hantzko, Lennart Binkowski, Sabhyata Gupta·Nov 1, 2024
Analysis of quantum processes, especially in the context of noise, errors, and decoherence is essential for the improvement of quantum devices. An intuitive representation of those processes modeled by quantum channels are Pauli transfer matrices. Th...
Adiabatic state preparation for digital quantum simulations of QED in 1 + 1D
Matteo D’Anna, M. K. Marinković, Joao C. Pinto Barros·Nov 1, 2024
Quantum electrodynamics in 1 + 1D (QED2) shares intriguing properties with QCD, including confinement, string breaking, and interesting phase diagram when the non-trivial topological $\theta$-term is considered. Its lattice regularization is a common...
Exploiting the Variational Quantum Eigensolver for Determining Ground State Energy of Protocatechuic Acid
G. F. D. Jesus, E. Teixeira, Lucas Q. Galvão +4 more·Nov 1, 2024
The Variational Quantum Eigensolver (VQE) is a promising hybrid algorithm, utilizing both quantum and classical computers to obtain the ground state energy of molecules. In this context, this study applies VQE to investigate the ground state of proto...
Quantum-centric computation of molecular excited states with extended sample-based quantum diagonalization
Stefano Barison, Javier Robledo Moreno, Mario Motta·Nov 1, 2024
The simulation of molecular electronic structure is an important application of quantum devices. Recently, it has been shown that quantum devices can be effectively combined with classical supercomputing centers in the context of the sample-based qua...
Low-degree approximation of QAC$^0$ circuits
Ashley Montanaro, Changpeng Shao, Dominic Verdon·Nov 1, 2024
QAC$^0$ is the class of constant-depth quantum circuits with polynomially many ancillary qubits, where Toffoli gates on arbitrarily many qubits are allowed. In this work, we show that the parity function cannot be computed in QAC$^0$, resolving a lon...
Quantum Entanglement Path Selection and Qubit Allocation via Adversarial Group Neural Bandits
Yingyu Huang, Lei Wang, Jie Xu·Nov 1, 2024
Quantum Data Networks (QDNs) have emerged as a promising framework in the field of information processing and transmission, harnessing the principles of quantum mechanics. QDNs utilize a quantum teleportation technique through long-distance entanglem...