Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Noisy Tensor Ring approximation for computing gradients of Variational Quantum Eigensolver for Combinatorial Optimization
Dheeraj Peddireddy, Utkarsh Priyam, V. Aggarwal·Jul 8, 2023
Variational Quantum algorithms, especially Quantum Approximate Optimization and Variational Quantum Eigensolver (VQE) have established their potential to provide computational advantage in the realm of combinatorial optimization. However, these algor...
Explainable quantum regression algorithm with encoded data structure
C.C.-Joseph Wang, F. Perkkola, I. Salmenperá +3 more·Jul 6, 2023
Hybrid variational quantum algorithms (VQAs) are promising for solving practical problems such as combinatorial optimization, quantum chemistry simulation, quantum machine learning, and quantum error correction on noisy quantum computers. However, wi...
A Hybrid Quantum-Classical Generative Adversarial Network for Near-Term Quantum Processors
Albha O’Dwyer Boyle, R. Nikandish·Jul 6, 2023
In this article, we present a hybrid quantum-classical generative adversarial network (GAN) for near-term quantum processors. The hybrid GAN comprises a variational generator and a discriminator quantum neural network, which are trained using a class...
Quantum Computing for High-Energy Physics: State of the Art and Challenges
A. D. Meglio, K. Jansen, I. Tavernelli +43 more·Jul 6, 2023
Quantum computers offer an intriguing path for a paradigmatic change of computing in the natural sciences and beyond, with the potential for achieving a so-called quantum advantage—namely, a significant (in some cases exponential) speedup of numerica...
Experimental demonstration of a high-fidelity virtual two-qubit gate
Akhil Pratap Singh, K. Mitarai, Yasunari Suzuki +4 more·Jul 6, 2023
We experimentally demonstrate a virtual two-qubit gate and characterize it using quantum process tomography~(QPT). The virtual two-qubit gate decomposes an actual two-qubit gate into single-qubit unitary gates and projection gates in quantum circuits...
Measurement-induced phase transitions in the toric code
Amir-Reza Negari, S. Sahu, T. Hsieh·Jul 5, 2023
We show how distinct phases of matter can be generated by performing random single-qubit measurements on a subsystem of toric code. Using a parton construction, such measurements map to random Gaussian tensor networks, and in particular, random Pauli...
Classically efficient regimes in measurement based quantum computation performed using diagonal two qubit gates and cluster measurements
S. Atallah, Michael Garn, Yi Tao +1 more·Jul 4, 2023
In a recent work arXiv:2201.07655v2 we showed that there is a constant $\lambda>0$ such that it is possible to efficiently classically simulate a quantum system in which (i) qudits are placed on the nodes of a graph, (ii) each qudit undergoes at most...
Systematic Computation of Braid Generator Matrix in Topological Quantum Computing
Abdellah Tounsi, N. Belaloui, Mohamed Messaoud Louamri +3 more·Jul 4, 2023
We provide a comprehensive systematic method for the numerical computation of elementary braid operations in topological quantum computation (TQC). This {procedure} is systematically applicable to all anyon models, including $SU(2)_k$. Braiding non-a...
Data-driven decoding of quantum error correcting codes using graph neural networks
Moritz Lange, Pontus Havström, Basudha Srivastava +6 more·Jul 3, 2023
To leverage the full potential of quantum error-correcting stabilizer codes it is crucial to have an efficient and accurate decoder. Accurate, maximum likelihood, decoders are computationally very expensive whereas decoders based on more efficient al...
Digital-analog quantum computation with arbitrary two-body Hamiltonians
Mikel Garcia-de-Andoin, Á. Sáiz, Pedro P'erez-Fern'andez +3 more·Jul 3, 2023
Digital-analog quantum computing is a computational paradigm which employs an analog Hamiltonian resource together with single-qubit gates to reach universality. Here, we design a new scheme which employs an arbitrary two-body source Hamiltonian, ext...
Clifford Group and Unitary Designs under Symmetry
Yosuke Mitsuhashi, N. Yoshioka·Jun 30, 2023
We have generalized the well-known statement that the Clifford group is a unitary 3-design into symmetric cases by extending the notion of unitary design. Concretely, we have proven that a symmetric Clifford group is a symmetric unitary 3-design if a...
Tailoring quantum error correction to spin qubits
Bence Het'enyi, James R. Wootton·Jun 30, 2023
Spin qubits in semiconductor structures bring the promise of large-scale 2D integration, with the possibility to incorporate the control electronics on the same chip. In order to perform error correction on this platform, the characteristic features ...
Fault-Tolerant Code-Switching Protocols for Near-Term Quantum Processors
Friederike Butt, Sascha Heußen, M. Rispler +1 more·Jun 30, 2023
Topological color codes are widely acknowledged as promising candidates for fault-tolerant quantum computing. Neither a two-dimensional nor a three-dimensional topology, however, can provide a universal gate set {, , }, with the gate missing in the t...
Tunable coupler to fully decouple and maximally localize superconducting qubits
Lukas Heunisch, C. Eichler, M. Hartmann·Jun 29, 2023
Enhancing the capabilities of superconducting quantum hardware, requires higher gate fidelities and lower crosstalk, particularly in larger scale devices, in which qubits are coupled to multiple neighbors. Progress towards both of these objectives wo...
Demonstrating Bayesian quantum phase estimation with quantum error detection
Kentaro Yamamoto, Samuel Duffield, Y. Kikuchi +1 more·Jun 29, 2023
Quantum phase estimation (QPE) serves as a building block of many different quantum algorithms and finds important applications in computational chemistry problems. Despite the rapid development of quantum hardware, experimental demonstration of QPE ...
Efficient Sampling of Noisy Shallow Circuits Via Monitored Unraveling
Zihan Cheng, Matteo Ippoliti·Jun 28, 2023
We introduce a classical algorithm for sampling the output of shallow, noisy random circuits on two-dimensional qubit arrays. The algorithm builds on the recently-proposed"space-evolving block decimation"(SEBD) and extends it to the case of noisy cir...
Efficient Photonic Graph State Generation
Seungbeom Chin, W. J. Munro·Jun 27, 2023
Graph states are central resources for quantum information processing, supporting applications in computation, communication, and error correction. In photonic systems, they are typically assembled from smaller entangled states using probabilistic fu...
Hybrid noise protection of logical qubits for universal quantum computation
Zhao-Ming Wang, Feng-Hua Ren, M. Byrd +1 more·Jun 27, 2023
Quantum computers now show the promise of surpassing any possible classical machine. However, errors limit this ability and current machines do not have the ability to implement error correcting codes due to the limited number of qubits and limited c...
Synthesis of Quantum Vector Databases Based on Grovers Algorithm
C. B. Pronin, A. Ostroukh·Jun 27, 2023
This paper describes a method for using Grovers algorithm to create a quantum vector database, the database stores embeddings based on Controlled-S gates, which represent a binary numerical value. This value represents the embeddings value. The proce...
Machine Learning based Noise Characterization and Correction on Neutral Atoms NISQ Devices
Ettore Canonici, Stefano Martina, R. Mengoni +2 more·Jun 27, 2023
Neutral atoms devices represent a promising technology using optical tweezers to geometrically arrange atoms and modulated laser pulses to control their quantum states. They are exploited as noisy intermediate‐scale quantum (NISQ) processors. Indeed,...