Papers
Live trends in quantum computing research, updated daily from arXiv.
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Research Volume
13,406 papers in 12 months (-22% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Using Bifluxon Tunneling to Protect the Fluxonium Qubit
Waël Ardati, S'ebastien L'eger, Shelender Kumar +8 more·Feb 7, 2024
Encoding quantum information in quantum states with disjoint wave-function support and noise-insensitive energies is the key behind the idea of qubit protection. While fully protected qubits are expected to offer exponential protection against both e...
Quantum circuit for multi-qubit Toffoli gate with optimal resource
Junhong Nie, Wei Zi, Xiaoming Sun·Feb 7, 2024
Resource consumption is an important issue in quantum information processing, particularly during the present NISQ era. In this paper, we investigate resource optimization of implementing multiple controlled operations, which are fundamental building...
Continuous-Variable Quantum Key Distribution with key rates far above the PLOB bound
A. Ray, Boris Škorić·Feb 7, 2024
Continuous-Variable Quantum Key Distribution (CVQKD) at large distances has such high noise levels that the error-correcting code must have very low rate. In this regime it becomes feasible to implement random-codebook error correction, which is know...
Robust projective measurements through measuring code-inspired observables
Yingkai Ouyang·Feb 6, 2024
Quantum measurements are ubiquitous in quantum information processing tasks, but errors can render their outputs unreliable. Here, we present a scheme that implements a robust projective measurement through measuring code-inspired observables. Namely...
Preparing general mixed quantum states on quantum computers
Douglas F. Pinto, Lucas Friedrich, Jonas Maziero·Feb 6, 2024
The preparation of quantum states serves as a pivotal subroutine across various domains, including quantum communication protocols, quantum computing, and the exploration of quantum correlations and other resources within physical systems. Building u...
Synchronous detection of cosmic rays and correlated errors in superconducting qubit arrays
P. M. Harrington, Mingyu Li, Max Hays +13 more·Feb 5, 2024
Quantum information processing at scale will require sufficiently stable and long-lived qubits, likely enabled by error-correction codes. Several recent superconducting-qubit experiments, however, reported observing intermittent spatiotemporally corr...
High temperature spin selectivity in a quantum dot qubit using reservoir spin accumulation
R. Jansen, S. Yuasa·Feb 3, 2024
Employing spins in quantum dots for fault-tolerant quantum computing in large-scale qubit arrays with on-chip control electronics requires high-fidelity qubit operation at elevated temperature. This poses a challenge for single spin initialization an...
Enhanced quantum state transfer by circumventing quantum chaotic behavior
Liang Xiang, Jiachen Chen, Zitian Zhu +16 more·Feb 1, 2024
The ability to realize high-fidelity quantum communication is one of the many facets required to build generic quantum computing devices. In addition to quantum processing, sensing, and storage, transferring the resulting quantum states demands a car...
Quantum-Assisted Hilbert-Space Gaussian Process Regression
Ahmad Farooq, Cristian A. Galvis-Florez, Simo Särkkä·Feb 1, 2024
Gaussian processes are probabilistic models that are commonly used as functional priors in machine learning. Due to their probabilistic nature, they can be used to capture the prior information on the statistics of noise, smoothness of the functions,...
Controlling NMR spin systems for quantum computation.
Jonathan A. Jones·Feb 1, 2024
Nuclear magnetic resonance is arguably both the best available quantum technology for implementing simple quantum computing experiments and the worst technology for building large scale quantum computers that has ever been seriously put forward. Afte...
A study of chaos and randomness in quantum systems
PG Sreeram·Feb 1, 2024
How classical chaos emerges from the underlying quantum world is a fundamental problem in physics. The origin of this question is in the correspondence principle. Classical chaos arises due to non-linear dynamics, whereas quantum mechanics, driven by...
Lightcone bounds for quantum circuit mapping via uncomplexity
M. Steinberg, Medina Bandic, Sacha Szkudlarek +3 more·Feb 1, 2024
Efficiently mapping quantum circuits onto hardware is integral for the quantum compilation process, wherein a circuit is modified in accordance with a quantum processor’s connectivity. Many techniques currently exist for solving this problem, wherein...
Enhanced observable estimation through classical optimization of informationally overcomplete measurement data: Beyond classical shadows
Joonas Malmi, Keijo Korhonen, Daniel Cavalcanti +1 more·Jan 31, 2024
In recent years, informationally complete measurements have attracted considerable attention, especially in the context of classical shadows. In the particular case of informationally over-complete measurements, for which the number of possible outco...
Intrinsic correlations for statistical ensembles of Dirac-like structures
Caio Fernando e Silva, A. Bernardini·Jan 31, 2024
The Weyl-Wigner formalism for evaluating the intrinsic information of Dirac bispinors as correlated qubits (localized) in a magnetic field is investigated in the extension to statistical ensembles. The confining external field quantizes the quantum c...
Decoherence-Free Subspaces Cannot Prevent the Collapse of Wave Functions
Alfred Li, H. Rabitz, Benjamin Lienhard·Jan 31, 2024
Efficacious quantum information processing relies on extended coherence and precise control. Investigating the limitations surrounding quantum processors is vital for their advancement. In their operation, one challenge is inadvertent wave function c...
Randomly Monitored Quantum Codes
Dongjin Lee, Beni Yoshida·Jan 31, 2024
Quantum measurement has conventionally been regarded as the final step in quantum information processing, which is essential for reading out the processed information but collapses the quantum state into a classical state. However, recent studies hav...
Correlated optical convolutional neural network with “quantum speedup”
Yifan Sun, Qian Li, Ling‐Jun Kong +1 more·Jan 31, 2024
Compared with electrical neural networks, optical neural networks (ONNs) have the potentials to break the limit of the bandwidth and reduce the consumption of energy, and therefore draw much attention in recent years. By far, several types of ONNs ha...
Towards enhancing quantum expectation estimation of matrices through partial Pauli decomposition techniques and post-processing
Dingjie Lu, Yangfan Li, Dax Enshan Koh +3 more·Jan 31, 2024
We introduce an approach for estimating the expectation values of arbitrary $n$-qubit matrices $M \in \mathbb{C}^{2^n\times 2^n}$ on a quantum computer. In contrast to conventional methods like the Pauli decomposition that utilize $4^n$ distinct quan...
Retrieving past quantum features with deep hybrid classical-quantum reservoir computing
J. Nokkala, G. Giorgi, R. Zambrini·Jan 30, 2024
Machine learning techniques have achieved impressive results in recent years and the possibility of harnessing the power of quantum physics opens new promising avenues to speed up classical learning methods. Rather than viewing classical and quantum ...
Realization of fractional quantum Hall state with interacting photons
Can Wang, Feng-Ming Liu, Ming-Cheng Chen +10 more·Jan 30, 2024
Fractional quantum Hall (FQH) states are known for their robust topological order and possess properties that are appealing for applications in fault-tolerant quantum computing. An engineered quantum platform would provide opportunities to operate FQ...