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Dynamic distributed storage algorithms such as DynaStore, Reconfigurable Paxos, RAMBO, and RDS, do not ensure liveness (wait-freedom) in asynchronous runs with infinitely many reconfigurations. We prove that this is inherent for…

分布式、并行与集群计算 · 计算机科学 2015-07-28 Alexander Spiegelman , Idit Keidar

To implement quantum algorithms on a quantum computer, we must overcome the twin problems of fault-tolerance -- how can we realize a relatively noiseless computation by cleverly combining noisy components? -- and compilation -- how can we…

量子物理 · 物理学 2026-04-29 Jack Weinberg , Narayanan Rengaswamy

We present PoWerStore, the first efficient robust storage protocol that achieves optimal latency without using digital signatures. PoWerStore's robustness comprises tolerating asynchrony, maximum number of Byzantine storage servers, any…

分布式、并行与集群计算 · 计算机科学 2012-12-27 Dan Dobre , Ghassan Karame , Wenting Li , Matthias Majuntke , Neeraj Suri , Marko Vukolic

Fault tolerance is critical for distributed stream processing systems, yet achieving error-free fault tolerance often incurs substantial performance overhead. We present AF-Stream, a distributed stream processing system that addresses the…

分布式、并行与集群计算 · 计算机科学 2019-08-13 Zhinan Cheng , Qun Huang , Patrick P. C. Lee

Elastic scaling is one of the central benefits provided by serverless platforms, and requires that they scale resource up and down in response to changing workloads. Serverless platforms scale-down resources by terminating previously…

分布式、并行与集群计算 · 计算机科学 2022-11-07 Kalev Alpernas , Aurojit Panda , Mooly Sagiv

Active quantum error correction using qubit stabilizer codes has emerged as a promising, but experimentally challenging, engineering program for building a universal quantum computer. In this review we consider the formalism of qubit…

量子物理 · 物理学 2015-04-13 Barbara M. Terhal

Quantum random-access look-up of a string of classical bits is a necessary ingredient in several important quantum algorithms. In some cases, the cost of such quantum random-access memory (qRAM) is the limiting factor in the implementation…

量子物理 · 物理学 2020-01-24 Olivia Di Matteo , Vlad Gheorghiu , Michele Mosca

Multi-versioned database systems have the potential to significantly increase the amount of concurrency in transaction processing because they can avoid read-write conflicts. Unfortunately, the increase in concurrency usually comes at the…

数据库 · 计算机科学 2015-12-04 Jose M. Faleiro , Daniel J. Abadi

A major challenge in performing quantum error correction (QEC) is implementing reliable measurements and conditional feed-forward operations. In quantum computing platforms supporting unconditional qubit resets, or a constant supply of…

量子物理 · 物理学 2024-12-23 Stefano Veroni , Markus Müller , Giacomo Giudice

The demand for data protection measures against unauthorized changes or deletions is steadily increasing. These measures are essential for maintaining the integrity and accessibility of data, effectively guarding against threats like…

密码学与安全 · 计算机科学 2024-10-30 Pasquale Caporaso , Giuseppe Bianchi , Francesco Quaglia

In large distributed systems, failures are a daily event occurring frequently, especially with growing numbers of computation tasks and locations on which they are deployed. The advantage of representing an application with a workflow is…

分布式、并行与集群计算 · 计算机科学 2024-07-09 Alberto Mulone , Doriana Medić , Marco Aldinucci

Low-depth random circuit codes possess many desirable properties for quantum error correction but have so far only been analyzed in the code capacity setting where it is assumed that encoding gates and syndrome measurements are noiseless.…

量子物理 · 物理学 2023-12-01 Jon Nelson , Gregory Bentsen , Steven T. Flammia , Michael J. Gullans

In distributed systems, data replication provides better availability, higher read capacity, improved access efficiency and lower bandwidth requirements in the system. In this paper, we propose a significantly efficient approach of the data…

分布式、并行与集群计算 · 计算机科学 2014-07-01 Vinit Kumar , Ajay Agarwal

The combination of machine learning and quantum computing has emerged as a promising approach for addressing previously untenable problems. Reservoir computing is an efficient learning paradigm that utilizes nonlinear dynamical systems for…

量子物理 · 物理学 2020-08-26 Jiayin Chen , Hendra I. Nurdin , Naoki Yamamoto

With the increasing importance of distributed scientific workflows, there is a critical need to ensure Quality of Service (QoS) constraints, such as minimizing time or limiting execution to resource subsets. However, the unpredictable…

分布式、并行与集群计算 · 计算机科学 2026-03-02 Md Hasanur Rashid , Jesun Firoz , Nathan R. Tallent , Luanzheng Guo , Meng Tang , Dong Dai

Consus is a strictly serializable geo-replicated transactional key-value store. The key contribution of Consus is a new commit protocol that reduces the cost of executing a transaction to three wide area message delays in the common case.…

分布式、并行与集群计算 · 计算机科学 2016-12-13 Robert Escriva , Robbert van Renesse

To achieve scalable universal quantum computing, we need to implement a universal set of logical gates fault-tolerantly, for which the main difficulty lies with non-Clifford gates. We demonstrate that several characteristic features of the…

量子物理 · 物理学 2025-02-04 Yi-Fei Wang , Yixu Wang , Yu-An Chen , Wenjun Zhang , Tao Zhang , Jiazhong Hu , Wenlan Chen , Yingfei Gu , Zi-Wen Liu

Quantum reservoir computing (QRC) harnesses driven quantum dynamics for time-series processing, yet the mechanisms behind the differing performance levels across its many implementations remain unclear. We show that apparently unrelated…

量子物理 · 物理学 2026-03-24 Saud Čindrak , Lara Giebeler , Niclas Götting , Christopher Gies , Kathy Lüdge

We propose in this paper to revisit the design of existing encrypted transport protocols to improve their efficiency. We call the methodology ``Reverso'' from reversing the order of field elements within a protocol specification. We detail…

密码学与安全 · 计算机科学 2025-11-17 Florentin Rochet

Decentralized finance revolutionizes traditional financial systems by leveraging blockchain technology to reduce trust. However, some vulnerabilities persist, notably front-running by malicious actors who exploit transaction information to…

分布式、并行与集群计算 · 计算机科学 2024-03-18 Christian Cachin , Jovana Micic