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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

High performance quantum communication without quantum memories

William J. Munro, Kae Nemoto

Published Oct 8, 2014• 0 citations
Publisher

Abstract

We present the pipe-lined design of a quantum communications network that neither requires the establishment of entanglement between remote locations nor the use of quantum memories. It can be shown that the rate at which quantum data can be transmitted through the network is only limited by the time required to perform efficient local gate operations. This packet switched scheme therefore has the potential to provide higher communications rates than previously thought possible.

DOI
10.1117/12.2061161

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We present the pipe-lined design of a quantum communications network that neither requires the establishment of entanglement between remote locations nor the use of quantum memories. It can be shown that the rate at which quantum data can be transmitted through the network is only limited by the time required to perform efficient local gate operations. This packet switched scheme therefore has the potential to provide higher communications rates than previously thought possible.
Long-range quantum communication and its associated repeater network are a necessity for any future quantum Internet. The performance of such networks is currently limited by the time it takes to establish entangled links between the appropriate parties on the network. Typically this scales as the round trip time for a signal to be transmitted between those parties. We present in this talk the design of a communications network for the direct transfer of quantum information where the rate at which quantum data can be transmitted is not limited by the distance the information needs to be sent but instead by the time to perform efficient local gate operations. Our scheme requires neither the establishment of entanglement between communication nodes nor the use of long-lived quantum memories. Our scheme thus provides a much higher communications rate than in standard teleportation based schemes.
Long-range quantum communication and its associated repeater network are a necessity for any future quantum Internet. The performance of such networks is currently limited by the time it takes to establish entangled links between the appropriate parties on the network. Typically this scales as the round trip time for a signal to be transmitted between those parties. We present in this talk the design of a communications network for the direct transfer of quantum information where the rate at which quantum data can be transmitted is not limited by the distance the information needs to be sent but instead by the time to perform efficient local gate operations. Our scheme requires neither the establishment of entanglement between communication nodes nor the use of long-lived quantum memories. Our scheme thus provides a much higher communications rate than in standard teleportation based schemes.
Quantum communication is a primitive necessary for any quantum internet, which at it’s core generally requires the formation of entangled links between remote locations. The performance of such links is limited by the classical signaling time between such locations, necessitating the need for long-lived quantum memories. Here, we present a network design that neither requires the establishment of entanglement between remote locations nor the use of long-lived quantum memories. The communication rate is only limited by the time required to perform local gates.
Quantum communication, our ability to transmission quantum information between remote locations, is a primitive operation necessary for any future quantum internet. At its heart quantum communication relies on establishing entangled links between remote locations which can then be used to teleport quantum data. The ultimate performance of such approaches is limited by photon losses in the optical fiber channels. We introduce the concept of quantum multiplexing, which allows us to both minimize the number of photons needed in the entanglement distribution processing while at the same time enhancing the quality of the entangled pairs generated. Our approach should improve the performance of quantum communication systems and repeater networks. © 2019 The Author(s)
Quantum communication which is our ability to transmission quantum information between remote locations is a primitive operation necessary for a future quantum internet. Quantum communication at its heart relies on establishing entangled links between remote locations which can then be used to teleport quantum data. Typically channel losses limit the distance that photons can be sent without some form of quantum repeater networks which segments the channel into smaller pieces. Entanglement distribution, purification and swapping operations then allows one to create high fidelity entangled pairs between the desired remote locations. Several generations of quantum repeaters have been proposed with dramatically increasing performance but the ultimate network performance is limited by channel losses which are typically fundamental in nature. Here we introduce the concept of quantum multiplexing, which allows us to both minimize the number of photons needed in the entanglement distribution processing but also enhance the quality of the entangled pairs generated. In this presentation we discuss the potential performance gains our quantum multiplexing approach gives.
This paper explores the feasibility and potential of constructing a distributed memory system leveraging quantum entanglement. The core claim is that quantum entanglement offers a pathway to realizing remote, high-capacity, and low-latency distributed memory, addressing limitations inherent in conventional distributed memory architectures. The proposed mechanism involves establishing a network of quantum processors, each storing a single quantum bit. Entanglement operations facilitate instantaneous access and manipulation of these quantum bits across vast distances, effectively creating a shared, distributed memory space. This approach contrasts sharply with traditional distributed memory, which relies on classical communication, offering the potential for significantly enhanced bandwidth and reduced latency due to the direct nature of quantum data access. This research outlines the fundamental concepts and challenges associated with this novel paradigm.