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Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Small correlation is sufficient for optimal noisy quantum metrology
Chao Yin, Victor V. Albert, Sisi Zhou·Jul 31, 2024
We propose a class of metrological resource states whose quantum Fisher information scales optimally in both system size and noise rate. In these states, qubits are partitioned into sensing groups with relatively large correlations within a group but...
On the Use of Calibration Data in Error-Aware Compilation Techniques for NISQ Devices
Handy Kurniawan, Laura Rodríguez-Soriano, Daniele Cuomo +2 more·Jul 31, 2024
Reliably executing quantum algorithms on noisy intermediate-scale quantum (NISQ) devices is challenging, as they are severely constrained and prone to errors. Efficient quantum circuit compilation techniques are therefore crucial for overcoming their...
Shadow hamiltonian simulation
R. Somma, R. King, Robin Kothari +2 more·Jul 31, 2024
Simulating quantum dynamics is one of the most important applications of quantum computers. Traditional approaches for quantum simulation involve preparing the full evolved state of the system and then measuring some physical quantity. Here, we prese...
Auxiliary-Free Replica Shadows: Efficient Estimation of Multiple Nonlinear Quantum Properties
Qing Liu, Zihao Li, Xiao Yuan +2 more·Jul 30, 2024
Efficient estimation of nonlinear properties is a significant yet challenging task from quantum information processing to many-body physics. Current methodologies often suffer from an exponential sampling cost or require auxiliary qubits and deep qua...
Single-photon microwave switch with a recoverable control photon
Davide Rinaldi, D. Nigro, Dario Gerace·Jul 29, 2024
Scalable quantum technologies may be applied in prospective architectures employing traditional information processing elements, such as transistors, rectifiers, or switches modulated by low-power inputs. In this respect, recently developed quantum p...
A Brief Introduction to Quantum Network Control
V. Valls, Panagiotis Promponas, L. Tassiulas·Jul 29, 2024
Quantum networking is an emerging area with the potential to transform information processing and communications. In this article, we present a brief introduction to quantum network control, an area in quantum networking dedicated to designing algori...
Strong coherent ion-electron coupling using a wire data bus
Baiyi Yu, R. Betzholz, Jianming Cai·Jul 29, 2024
Ion-ion coupling over long distances represents a highly useful resource for quantum technologies, for example, to sympathetically cool or interconnect qubits in ion-based quantum-computing architectures. In this respect, the recently demonstrated wi...
Benchmarking and Fidelity Response Theory of High-Fidelity Rydberg Entangling Gates
R. Tsai, Xiangkai Sun, Adam L. Shaw +2 more·Jul 29, 2024
The fidelity of entangling operations is a key figure of merit in quantum information processing, especially in the context of quantum error correction. High-fidelity entangling gates in neutral atoms have seen remarkable advancement recently. A full...
Trainability maximization using estimation of distribution algorithms assisted by surrogate modelling for quantum architecture search
Vicente P. Soloviev, V. Dunjko, C. Bielza +2 more·Jul 29, 2024
Quantum architecture search (QAS) involves optimizing both the quantum parametric circuit configuration but also its parameters for a variational quantum algorithm. Thus, the problem is known to be multi-level as the performance of a given architectu...
Realization of high-fidelity perfect entangler between remote superconducting quantum processors
Juan Song, Shuang Yang, Pei Liu +7 more·Jul 29, 2024
Superconducting qubits, a promising candidate for universal quantum computing, currently face limitations in chip size due to reproducibility, wiring complexity, and packaging modes. Distributed quantum modules offer a viable strategy for constructin...
Quantum HodgeRank: Topology-based rank aggregation on quantum computers
Caesnan M. G. Leditto, A. Southwell, Behnam Tonekaboni +2 more·Jul 29, 2024
HodgeRank generalizes ranking algorithms, e.g. Google PageRank, to rank alternatives based on real-world (often incomplete) data using graphs and discrete exterior calculus. It analyzes multipartite interactions on high-dimensional networks with a co...
Purification and correction of quantum channels by commutation-derived quantum filters
Sowmitra Das, Jinzhao Sun, Michael Hanks +2 more·Jul 29, 2024
Reducing errors is essential for reliable quantum computation. Quantum error mitigation (QEM) and quantum error correction (QEC) are two leading approaches for this task, each with challenges: QEM suffers from high sampling costs and cannot recover s...
Expectation value estimation with parametrized quantum circuits
Bujiao Wu, Lingyu Kong, Yuxuan Yan +2 more·Jul 28, 2024
Estimating properties of quantum states, such as fidelities, molecular energies, and correlation functions, is a fundamental task in quantum information science. Due to the limitation of practical quantum devices, including limited circuit depth and ...
Effects of quadratic optomechanical coupling on bipartite entanglements, mechanical ground-state cooling, and mechanical quadrature squeezing in an electro-optomechanical system
N. Ghorbani, A. Motazedifard, M. Naderi·Jul 27, 2024
We theoretically investigate the steady-state bipartite entanglements, mechanical ground-state cooling, and mechanical quadrature squeezing in a hybrid electro-optomechanical system where a moving membrane is linearly coupled to the microwave field m...
Robust multi-mode superconducting circuit optimized for quantum information processing
P. García-Azorín, F. A. Cárdenas-López, G. B. P. Huber +5 more·Jul 26, 2024
Multi-mode superconducting circuits offer a promising platform for engineering robust systems for quantum computation. Previous studies indicate that single-mode devices cannot be engineered to simultaneously exhibit resilience against multiple decoh...
Phase transitions in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo><mml:mi mathvariant="normal">D</mml:mi></mml:mrow></mml:math> subsystem-symmetric monitored quantum circuits
Cole Kelson-Packer, A. Miyake·Jul 25, 2024
The interplay of unitary evolution and projective measurements is a modern interest in the study of many-body entanglement. On the one hand, the competition between these two processes leads to the recently discovered measurement-induced phase transi...
Systematic study of High $E_J/E_C$ transmon qudits up to $d = 12$
Z. Wang, R. Parker, E. Champion +1 more·Jul 24, 2024
Qudits provide a resource-efficient alternative to qubits for quantum information processing. The multilevel nature of the transmon, with its individually resolvable transition frequencies, makes it an attractive platform for superconducting circuit-...
Quantum Algorithms for Realizing Symmetric, Asymmetric, and Antisymmetric Projectors
Margarite L. LaBorde, Soorya Rethinasamy, Mark M. Wilde·Jul 24, 2024
In quantum computing, knowing the symmetries a given system or state obeys or disobeys is often useful. For example, Hamiltonian symmetries may limit allowed state transitions or simplify learning parameters in machine learning applications, and cert...
Entanglement dynamics from universal low-lying modes
Shreya Vardhan, Sanjay Moudgalya·Jul 23, 2024
Information-theoretic quantities such as Renyi entropies show a remarkable universality in their late-time behaviour across a variety of chaotic many-body systems. Understanding how such common features emerge from very different microscopic dynamics...
A Nanomechanical Atomic Force Qubit
Shahin Jahanbani, Zi-Huai Zhang, Bin Hua +5 more·Jul 22, 2024
Silicon nanomechanical resonators display ultra-long lifetimes at cryogenic temperatures and microwave frequencies. Achieving quantum control of single-phonons in these devices has so far relied on nonlinearities enabled by coupling to ancillary qubi...