Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Avoiding barren plateaus in the variational determination of geometric entanglement
L. Zambrano, A. Muñoz-Moller, M. Muñoz +2 more·Apr 26, 2023
The barren plateau (BP) phenomenon is one of the main obstacles to implementing variational quantum algorithms in the current generation of quantum processors. Here, we introduce a method capable of avoiding the BP phenomenon in the variational deter...
Hotter is Easier: Unexpected Temperature Dependence of Spin Qubit Frequencies
B. Undseth, O. Pietx-Casas, E. Raymenants +13 more·Apr 25, 2023
As spin-based quantum processors grow in size and complexity, maintaining high fidelities and minimizing crosstalk will be essential for the successful implementation of quantum algorithms and error-correction protocols. In particular, recent experim...
Quantum Neural Network for Quantum Neural Computing
Min-Gang Zhou, Zhi-Ping Liu, Hua‐Lei Yin +3 more·Apr 14, 2023
Neural networks have achieved impressive breakthroughs in both industry and academia. How to effectively develop neural networks on quantum computing devices is a challenging open problem. Here, we propose a new quantum neural network model for quant...
Static Entanglement Analysis of Quantum Programs
Shangzhou Xia, Jianjun Zhao·Apr 11, 2023
Quantum entanglement plays a crucial role in quantum computing. Entangling information has important implications for understanding the behavior of quantum programs and avoiding entanglement-induced errors. Entanglement analysis is a static code anal...
Optimizing quantum noise-induced reservoir computing for nonlinear and chaotic time series prediction
D. Fry, Amol Deshmukh, Samuel Yen-Chi Chen +2 more·Mar 9, 2023
Quantum reservoir computing is strongly emerging for sequential and time series data prediction in quantum machine learning. We make advancements to the quantum noise-induced reservoir, in which reservoir noise is used as a resource to generate expre...
Measurement-induced entanglement and teleportation on a noisy quantum processor
Jesse C. Hoke, Matteo Ippoliti, D. Abanin +160 more·Mar 8, 2023
Measurement has a special role in quantum theory^ 1 : by collapsing the wavefunction, it can enable phenomena such as teleportation^ 2 and thereby alter the ‘arrow of time’ that constrains unitary evolution. When integrated in many-body dynamics, mea...
High-fidelity parametric beamsplitting with a parity-protected converter
Yao Lu, Aniket Maiti, John W. O. Garmon +6 more·Mar 2, 2023
Fast, high-fidelity operations between microwave resonators are an important tool for bosonic quantum computation and simulation with superconducting circuits. An attractive approach for implementing these operations is to couple these resonators via...
Designing High-Fidelity Zeno Gates for Dissipative Cat Qubits
R. Gautier, M. Mirrahimi, A. Sarlette·Mar 1, 2023
Bosonic cat qubits stabilized with a driven two-photon dissipation are systems with exponentially biased noise, opening the door to low-overhead, fault-tolerant and universal quantum computing. However, current gate proposals for such qubits induce s...
Using Cryogenic CMOS Control Electronics to Enable a Two-Qubit Cross-Resonance Gate
D. Underwood, J. Glick, K. Inoue +18 more·Feb 22, 2023
Qubit control electronics composed of CMOS circuits are of critical interest for next generation quantum computing systems. A CMOS-based application specific integrated circuit (ASIC) fabricated in 14nm FinFET technology was used to generate and sequ...
Controlling frequency-domain Hong-Ou-Mandel interference via electromagnetically induced transparency
Zi-Yu Liu, Jiun-Shiuan Shiu, Chin-Yao Cheng +1 more·Feb 14, 2023
Hong-Ou-Mandel (HOM) interference is a compelling quantum phenomenon that demonstrates the nonclassical nature of single photons. In this study, we investigate an electromagnetically induced transparency-based double-$\Lambda$ four-wave mixing system...
Autonomous coherence protection of a two-level system in a fluctuating environment
Fernando Quijandr'ia, J. Twamley·Feb 8, 2023
We re-examine a scheme generalized by [R. Finkelstein et al, Phys. Rev. X 11, 011008 (2021)], whose original purpose was to remove the effects of static Doppler broadening from an ensemble of non-interacting two-level systems (qubits). This scheme in...
Measurement-Altered Ising Quantum Criticality
S. Murciano, Pablo Sala, Yue Liu +2 more·Feb 8, 2023
Quantum critical systems constitute appealing platforms for the exploration of novel measurement-induced phenomena due to their innate sensitivity to perturbations. We study the impact of measurement on paradigmatic Ising quantum critical chains usin...
Argon-Milling-Induced Decoherence Mechanisms in Superconducting Quantum Circuits
J. Van Damme, T. Ivanov, P. Favia +12 more·Feb 7, 2023
The fabrication of superconducting circuits requires multiple deposition, etch and cleaning steps, each possibly introducing material property changes and microscopic defects. In this work, we specifically investigate the process of argon milling, a ...
Studying phonon coherence with a quantum sensor
A. Cleland, E. Alex Wollack, A. Safavi-Naeini·Feb 1, 2023
Nanomechanical oscillators offer numerous advantages for quantum technologies. Their integration with superconducting qubits shows promise for hardware-efficient quantum error-correction protocols involving superpositions of mechanical coherent state...
Radiation-induced secondary emissions in solid-state devices as a possible contribution to quasiparticle poisoning of superconducting circuits
F. Ponce, J. Orrell, Zheming Wang·Jan 19, 2023
This report estimates the potential for secondary emission processes induced by ionizing radiation to result in the generation of quasiparticles in superconducting circuits. These estimates are based on evaluation of data collected from a small super...
Taking advantage of noise in quantum reservoir computing
L. Domingo, G. Carlo, F. Borondo·Jan 17, 2023
The biggest challenge that quantum computing and quantum machine learning are currently facing is the presence of noise in quantum devices. As a result, big efforts have been put into correcting or mitigating the induced errors. But, can these two fi...
Nanoscale addressing and manipulation of neutral atoms using electromagnetically induced transparency
U. Sağlam, Thomas G. Walker, M. Saffman +1 more·Jan 9, 2023
We propose to integrate dark-state based localization techniques into a neutral atom quantum computing architecture and numerically investigate two specific schemes. The first scheme implements state-selective projective measurement by scattering pho...
Reduced basis emulation of pairing in finite systems
V. Baran, D. Nichita·Dec 29, 2022
In recent years, reduced basis methods (RBMs) have been adapted to the many-body eigenvalue problem and they have been used, largely in nuclear physics, as fast emulators able to bypass expensive direct computations while still providing highly accur...
High-performance repetition cat code using fast noisy operations
François-Marie Le Régent, Camille Berdou, Z. Leghtas +2 more·Dec 22, 2022
Bosonic cat qubits stabilized by two-photon driven dissipation benefit from exponential suppression of bit-flip errors and an extensive set of gates preserving this protection. These properties make them promising building blocks of a hardware-effici...
Synergetic quantum error mitigation by randomized compiling and zero-noise extrapolation for the variational quantum eigensolver
Tomochika Kurita, Hammam Qassim, M. Ishii +3 more·Dec 21, 2022
We propose a quantum error mitigation strategy for the variational quantum eigensolver (VQE) algorithm. We find, via numerical simulation, that very small amounts of coherent noise in VQE can cause substantially large errors that are difficult to sup...