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In a time-slotted system, we study the problem of scheduling multipartite entanglement requests in a quantum switch with a finite number of quantum memory registers. Specifically, we consider probabilistic link-level entanglement (LLE)…

信息论 · 计算机科学 2026-01-21 Stavros Mitrolaris , Subhankar Banerjee , Sennur Ulukus

We study a quantum switch that distributes maximally entangled multipartite states to sets of users. The entanglement switching process requires two steps: first, each user attempts to generate bipartite entanglement between itself and the…

量子物理 · 物理学 2022-12-06 Philippe Nain , Gayane Vardoyan , Saikat Guha , Don Towsley

We study a quantum switch that creates shared end-to-end entangled quantum states to multiple sets of users that are connected to it. Each user is connected to the switch via an optical link across which bipartite Bell-state entangled…

量子物理 · 物理学 2022-06-08 Thirupathaiah Vasantam , Don Towsley

With a growing number of quantum networks in operation, there is a pressing need for performance analysis of quantum switching technologies. A quantum switch establishes, distributes, and maintains entanglements across a network. In…

量子物理 · 物理学 2025-01-10 Sanidhay Bhambay , Thirupathaiah Vasantam , Neil Walton

We consider a quantum switch with a finite number of quantum memory registers that aims to serve multipartite entanglement requests among $N$ users. We propose scheduling policies that aim to optimize the average number of requests served…

信息论 · 计算机科学 2026-03-25 Subhankar Banerjee , Stavros Mitrolaris , Sennur Ulukus

Quantum switches are envisioned to be an integral component of future entanglement distribution networks. They can provide high quality entanglement distribution service to end-users by performing quantum operations such as entanglement…

量子物理 · 物理学 2022-12-06 Nitish K. Panigrahy , Thirupathaiah Vasantam , Don Towsley , Leandros Tassiulas

We study a quantum entanglement distribution switch serving a set of users in a star topology with equal-length links. The quantum switch, much like a quantum repeater, can perform entanglement swapping to extend entanglement across longer…

网络与互联网体系结构 · 计算机科学 2022-06-22 Gayane Vardoyan , Philippe Nain , Saikat Guha , Don Towsley

We consider scheduling in a quantum switch with stochastic entanglement generation, finite quantum memories, and decoherence. The objective is to design a scheduling algorithm with polynomial-time computational complexity that stabilizes a…

最优化与控制 · 数学 2026-03-31 R. Srikant

This paper studies the capacity of the quantum switch for two decoherence models: when link-level entanglements last (i) for a time slot, or (ii) until they are used to serve a request (i.e., there is no decoherence). The two models are…

最优化与控制 · 数学 2024-07-30 Víctor Valls , Panagiotis Promponas , Leandros Tassiulas

We study the possibility of implementing a quantum switch and a quantum memory for matter wave lattice solitons by making them interact with "effective" potentials (barrier/well) corresponding to defects of the optical lattice. In the case…

其他凝聚态物理 · 物理学 2009-11-11 V. Ahufinger , A. Mebrahtu , R. Corbalan , A. Sanpera

We develop entanglement swapping protocols and memory allocation methods for quantum repeater chains. Unlike most of the existing studies, the memory size of each quantum repeater in this work is a parameter that can be optimized. Based on…

量子物理 · 物理学 2021-11-23 Wenhan Dai , Don Towsley

It is often said that one of the biggest limitations on computer performance is memory bandwidth (i.e."the memory wall problem"). In this position paper, I argue that if historical trends in computing evolution (where growth in available…

操作系统 · 计算机科学 2011-05-11 Niall Douglas

To scale quantum computers to useful levels, we must build networks of quantum computational nodes that can share entanglement for use in distributed forms of quantum algorithms. In one proposed architecture, node-to-node entanglement is…

Distributing entanglement over long distances is one of the central tasks in quantum networks. An important problem, especially for near-term quantum networks, is to develop optimal entanglement distribution protocols that take into account…

量子物理 · 物理学 2021-09-08 Sumeet Khatri

Memory-assisted quantum key distribution (MA-QKD) has recently been proposed as a technique to improve the rate-versus-distance behavior of QKD systems by using existing, or nearly-achievable, quantum technologies. The promise is that…

量子物理 · 物理学 2017-07-26 Nicolo Lo Piparo , Neil Sinclair , Mohsen Razavi

Reservoir computing is a promising neuromorphic paradigm, and its quantum implementation using spin networks has shown some advantage when entanglement is present. Here, we consider a distributed scenario in which two distinct input time…

量子物理 · 物理学 2025-11-10 Sareh Askari , Youssef Kora , Christoph Simon

The development of quantum networks (QNs) relies on efficient mechanisms for distributing entanglement among multiple quantum users (QUs) under practical system constraints. This paper investigates the problem of entanglement rate…

量子物理 · 物理学 2026-04-07 Kavini Thenuwara , Shiva Kazemi Taskooh , Ekram Hossain

Memory dephasing and its impact on the rate of entanglement generation in quantum repeaters is addressed. For systems that rely on probabilistic schemes for entanglement distribution and connection, we estimate the maximum achievable rate…

量子物理 · 物理学 2009-09-12 M. Razavi , M. Piani , N. Lutkenhaus

Quantum switches are critical components in quantum networks, distributing maximally entangled pairs among end nodes by entanglement swapping. In this work, we design protocols that schedule entanglement swapping operations in quantum…

量子物理 · 物理学 2023-05-23 Wenhan Dai , Anthony Rinaldi , Don Towsley

Efficient and coherent data retrieval and storage are essential for harnessing quantum algorithms' speedup. Such a fundamental task is addressed by a quantum Random Access Memory (qRAM). Despite their promising scaling properties, current…

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