Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Doped stabilizer states in many-body physics and where to find them
Andi Gu, Salvatore F. E. Oliviero, L. Leone·Mar 22, 2024
This work uncovers a fundamental connection between doped stabilizer states, a concept from quantum information theory, and the structure of eigenstates in perturbed many-body quantum systems. We prove that for Hamiltonians consisting of a sum of com...
Depth scaling of unstructured search via quantum approximate optimization
E. Campos, D. Rabinovich, Alexey Uvarov·Mar 22, 2024
Variational quantum algorithms have become the de facto model for current quantum computations. A prominent example of such algorithms -- the quantum approximate optimization algorithm (QAOA) -- was originally designed for combinatorial optimization ...
Image Classification with Rotation-Invariant Variational Quantum Circuits
Paul San Sebastian, Mikel Cañizo, Rom'an Or'us·Mar 22, 2024
Variational quantum algorithms are gaining attention as an early application of noisy intermediate-scale quantum (NISQ) devices. One of the main problems of variational methods lies in the phenomenon of , present in the optimization of variational pa...
Linear Cross-Entropy Certification of Quantum Computational Advantage in Gaussian Boson Sampling
Javier Martínez-Cifuentes, H. de Guise, Nicolás Quesada·Mar 22, 2024
Validation of quantum advantage claims in the context of Gaussian boson sampling (GBS) currently relies on providing evidence that the experimental samples genuinely follow their corresponding ground truth, i.e., the theoretical model of the experime...
Analysis of optical loss thresholds in the fusion-based quantum computing architecture
A. Melkozerov, Ashot Avanesov, I. Dyakonov +1 more·Mar 21, 2024
Bell state measurements (BSMs) play a significant role in quantum information and quantum computing, in particular in fusion-based quantum computing (FBQC). The FBQC model is a framework for universal quantum computing, provided that we are able to p...
Optimal Control in Large Open Quantum Systems: The Case of Transmon Readout and Reset.
R. Gautier, É. Genois, Alexandre Blais·Mar 21, 2024
We present a framework that combines the adjoint-state method together with reverse-time backpropagation to solve prohibitively large open-system quantum control problems. Our approach enables the optimization of arbitrary cost functions with fully g...
Bootstrapping shallow circuits
Ning Bao, Gun Suer·Mar 21, 2024
Recently, a polynomial time classical algorithm has been found for learning the shallow representation of a unitary $U$ acting on $n$-qubits, by learning local inversions and then sewing them back together with ancilla qubits and SWAP gates. In this ...
Direct Probe of Topology and Geometry of Quantum States on IBM Q
Tianqi Chen, Hai-Tao Ding, Ruizhe Shen +2 more·Mar 21, 2024
The concepts of topology and geometry are of critical importance in exploring exotic phases of quantum matter. Though they have been investigated on various experimental platforms, to date a direct probe of topological and geometric properties on a u...
Polynomial-Time Classical Simulation of Noisy IQP Circuits with Constant Depth
Joel Rajakumar, James D. Watson, Yi-Kai Liu·Mar 21, 2024
Sampling from the output distributions of quantum computations comprising only commuting gates, known as instantaneous quantum polynomial (IQP) computations, is believed to be intractable for classical computers, and hence this task has become a lead...
Qu8its for quantum simulations of lattice quantum chromodynamics
Marc Illa, C. Robin, Martin J. Savage·Mar 21, 2024
We explore the utility of $d=8$ qudits, qu8its, for quantum simulations of the dynamics of 1+1D SU(3) lattice quantum chromodynamics, including a mapping for arbitrary numbers of flavors and lattice size and a re-organization of the Hamiltonian for e...
Utilizing small quantum computers for machine learning and ground state energy approximation
Stian D. Bilek·Mar 21, 2024
Quantum circuit partitioning (QCP) is a hybrid quantum-classical approach that aims to simulate large quantum systems on smaller quantum computers. A quantum computation is divided into smaller subsystems and results of measurements on these subsyste...
Learning with SASQuaTCh: a Novel Variational Quantum Transformer Architecture with Kernel-Based Self-Attention
Ethan N. Evans, Matthew Cook, Zachary P. Bradshaw +1 more·Mar 21, 2024
The recent exploding growth in size of state-of-the-art machine learning models highlights a well-known issue where exponential parameter growth, which has grown to trillions as in the case of the Generative Pre-trained Transformer (GPT), leads to tr...
Tensor quantum programming
A. Termanova, Artem Melnikov, E. Mamenchikov +6 more·Mar 20, 2024
Running quantum algorithms often involves implementing complex quantum circuits with such a large number of multi-qubit gates that the challenge of tackling practical applications appears daunting. In this article, we propose a novel approach called ...
Scalability of quantum error mitigation techniques: from utility to advantage
S. N. Filippov, Sabrina Maniscalco, Guillermo Garc'ia-P'erez·Mar 20, 2024
Error mitigation has elevated quantum computing to the scale of hundreds of qubits and tens of layers; however, yet larger scales (deeper circuits) are needed to fully exploit the potential of quantum computing to solve practical problems otherwise i...
FPGA-Based Distributed Union-Find Decoder for Surface Codes
Namitha Liyanage, Yue Wu, Siona Tagare +1 more·Mar 20, 2024
A fault-tolerant quantum computer must decode and correct errors faster than they appear to prevent exponential slowdown due to error correction. The Union-Find (UF) decoder is promising with an average time complexity slightly higher than <inline-fo...
How scanning probe microscopy can be supported by artificial intelligence and quantum computing?
A. Pręgowska, Agata Roszkiewicz, Magdalena Osial +1 more·Mar 20, 2024
The impact of Artificial Intelligence (AI) is rapidly expanding, revolutionizing both science and society. It is applied to practically all areas of life, science, and technology, including materials science, which continuously requires novel tools f...
Phase transition of a continuous-time quantum walk on the half line
T. Machida·Mar 20, 2024
Quantum walks are referred to as quantum analogs to random walks in mathematics. They have been studied as quantum algorithms in quantum information for quantum computers. There are two types of quantum walks. One is the discrete-time quantum walk an...
Beyond Quantum Shannon: Circuit Construction for General n-Qubit Gates Based on Block ZXZ-Decomposition
Anna M. Krol, Zaid Al-Ars·Mar 20, 2024
This paper proposes a new optimized quantum block-ZXZ decomposition method [7,8,10] that results in more optimal quantum circuits than the quantum Shannon decomposition (QSD)[27], which was introduced in 2006 by Shende et al. The decomposition is app...
Experimental fault-tolerant code switching
Ivan Pogorelov, Friederike Butt, L. Postler +4 more·Mar 20, 2024
Quantum error correction is essential for mitigating hardware errors in quantum computers by encoding logical information into several physical qubits. However, no single error-correcting code intrinsically supports a fault-tolerant implementation of...
Quantum chaos in the sparse SYK model
Patrick Orman, H. Gharibyan, J. Preskill·Mar 20, 2024
The Sachdev-Ye-Kitaev (SYK) model is a system of N Majorana fermions with random interactions and strongly chaotic dynamics, which at low energy admits a holographically dual description as two-dimensional Jackiw-Teitelboim gravity. Hence the SYK mod...