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Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Degenerate quantum erasure decoding
Kao-Yueh Kuo, Yingkai Ouyang·Nov 20, 2024
Erasures are the primary type of errors in physical systems dominated by leakage errors. While quantum error correction (QEC) using stabilizer codes can combat erasure errors, it remains unknown which constructions achieve capacity performance. If ...
Asymptotic robustness of entanglement in noisy quantum networks and graph connectivity
Fernando Lledó, Carlos Palazuelos, Julio I. de Vicente·Nov 19, 2024
Quantum networks are promising venues for quantum information processing. This motivates the study of the entanglement properties of the particular multipartite quantum states that underpin these structures. In particular, it has been recently shown ...
Variational Learning of Integrated Quantum Photonic Circuits via Genetic Algorithm
Hui Zhang, Chengran Yang, Wai-Keong Mok +11 more·Nov 19, 2024
Integrated photonic circuits play a crucial role in implementing quantum information processing in the noisy intermediate‐scale quantum (NISQ) era. Variational learning is a promising avenue that leverages classical optimization techniques to enhance...
Quantum versatility in PageRank
Wei-Wei Zhang, Zheping Wu, Hengyue Jia +4 more·Nov 19, 2024
Quantum mechanics empowers the emergence of quantum advantages in various fields, including quantum algorithms. Quantum PageRank is a promising tool for a future quantum internet. Recently, arbitrary phase rotations (APRs) have been introduced in the...
Quantum teleportation with dissimilar quantum dots over a hybrid quantum network
Alessandro Laneve, G. Ronco, Mattia Beccaceci +24 more·Nov 19, 2024
Photonic quantum information processing in metropolitan quantum networks lays the foundation for cloud quantum computing [1, 2], secure communication [3, 4], and the realization of a global quantum internet [5, 6]. This paradigm shift requires on-dem...
Thermodynamic limitations on fault-tolerant quantum computing
Mykhailo Bilokur, Sarang Gopalakrishnan, Shayan Majidy·Nov 19, 2024
We investigate the thermodynamic limits on scaling fault-tolerant quantum computers due to heating from quantum error correction (QEC). Quantum computers require error correction, which accounts for 99.9% of the qubit demand and generates heat throug...
Simulation of Quantum Transduction Strategies for Quantum Networks
Laura d'Avossa, Caitao Zhan, Joaquin Chung +3 more·Nov 18, 2024
The Quantum Internet would likely be composed of diverse qubit technologies that interact through a heterogeneous quantum network. Thus, quantum transduction has been identified as a key enabler of the Quantum Internet. To better study heterogeneous ...
Strong-coupling quantum thermodynamics using a superconducting flux qubit
Rishabh Upadhyay, B. Karimi, D. Subero +4 more·Nov 16, 2024
Thermodynamics in quantum circuits aims to find improved functionalities of thermal machines, highlight fundamental phenomena peculiar to quantum nature in thermodynamics, and point out limitations in quantum information processing due to coupling of...
Local Clustering Decoder as a fast and adaptive hardware decoder for the surface code
Abbas B. Ziad, Ankit Zalawadiya, Canberk Topal +4 more·Nov 15, 2024
To avoid prohibitive overheads in performing fault-tolerant quantum computation, the decoding problem needs to be solved accurately and at speeds sufficient for fast feedback. Existing decoding systems fail to satisfy both of these requirements, mean...
How contextuality and antidistinguishability are related
Maiyuren Srikumar, Stephen D. Bartlett, Angela Karanjai·Nov 15, 2024
Contextuality is a key characteristic that separates quantum from classical phenomena and an important tool in understanding the potential advantage of quantum computation. However, when assessing the quantum resources available for quantum informati...
How quantum computing can enhance biomarker discovery
Frederik F. Flöther, Daniel J. Blankenberg, Maria Demidik +7 more·Nov 15, 2024
Summary Biomarkers play a central role in medicine’s gradual progress toward proactive, personalized precision diagnostics and interventions. However, finding biomarkers that provide very early indicators of a change in health status, for example, fo...
Measuring Butterfly Velocity in the XY Model on Emerging Quantum Computers
C. McCartney, Eric Chen, Subhayan Roy Moulik·Nov 15, 2024
The butterfly velocity is commonly used to understand information transport properties in quantum dynamical systems and is related to growth of operators. Here we utilise a quantum teleportation based protocol and Riemannian Trust-Region method to es...
Post-Newtonian Effective Field Theory Approach to Entanglement Harvesting, Quantum Discord and Bell's Nonlocality Bound Near a Black Hole
Feng-Li Lin, Sayid Mondal·Nov 14, 2024
Black holes, as characterized by the Hawking effect and Bekenstein-Hawking entropy, can be treated as a compact object carrying nontrivial quantum information obscured behind the event horizon. Thus, the black hole may convey and retract its quantum ...
Left-Right Relative Entropy
Mostafa Ghasemi·Nov 14, 2024
The concept of distinguishability lies at the heart of quantum information theory. We introduce \textit{left-right relative entropy} as a quantitative measure of distinguishability within the space of boundary states in two-dimensional conformal fiel...
A decompositional framework for process theories in spacetime
Matthias Salzger, John H. Selby·Nov 13, 2024
There has been a recent surge of interest within the field of quantum foundations regarding incorporating ideas from general relativity and quantum gravity. However, many quantum information tools remain agnostic to the underlying spacetime. For inst...
On some states minimizing uncertainty relations: A new look at these relations
Krzysztof Urbanowski·Nov 12, 2024
Analyzing Heisenberg--Robertson (HR) and Schrödinger uncertainty relations we found, that there can exist a large set of states of the quantum system under considerations, for which the lower bound of the product of the standard deviations of a pair ...
Characterising memory in quantum channel discrimination via constrained separability problems
Ties-A. Ohst, Shijun Zhang, Hai Chau Nguyen +2 more·Nov 12, 2024
Quantum memories are a crucial precondition in many protocols for processing quantum information. A fundamental problem that illustrates this statement is given by the task of channel discrimination, in which an unknown channel drawn from a known ran...
A cat qubit stabilization scheme using a voltage biased Josephson junction
Thiziri Aissaoui, A. Murani, R. Lescanne +1 more·Nov 12, 2024
DC-voltage-biased Josephson junctions have been recently employed in superconducting circuits for Hamiltonian engineering, demonstrating microwave amplification, single photon sources and entangled photon generation. Compared to more conventional app...
Routing Algorithm Within the Multiple Non-Overlapping Paths’ Approach for Quantum Key Distribution Networks
E. Kiktenko, A. Tayduganov, Aleksey K. Fedorov·Nov 12, 2024
We develop a novel key routing algorithm for quantum key distribution (QKD) networks that utilizes a distribution of keys between remote nodes, i.e., not directly connected by a QKD link, through multiple non-overlapping paths. This approach focuses ...
Emergent Geometry from Quantum Probability
Shadi Ali Ahmad, M. Klinger·Nov 11, 2024
Carrying the insights of conditional probability to the quantum realm is notoriously difficult due to the non-commutative nature of quantum observables. Nevertheless, conditional expectations on von Neumann algebras have played a significant role in ...