Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

Quantum Multiplexing

William J. Munro

Published Jun 21, 2021• 0 citations
Publisher

Abstract

Multiplexing is an extremely well-established technique in the telecommunication industry [1] allowing multiple independent massages generated by multiple users to share a common transmission line. It works by the multiplexer dividing the capacity of the communication channel into a number of ‘logical’ channels which allow each of the users signal to be transmitted before a demultiplexer extracts them. There are various forms of it including space-division, frequency-division, time-division, code-division multiplexing to mention a few. Recently new form of ‘telecommunication’ has arisen. The principle of quantum mechanics and their associated quantum technologies [2] allow new forms of communication governed by superposition/entanglement and it is an open question as to where multiplexing will fit into it. Further those quantum principles may allow new forms of multiplexing unavailable to the classical world.

DOI
10.1109/cleo/europe-eqec52157.2021.9542138

Related papers

Quantum Multiplexing for Quantum Computer Networks

Juan Carlos García-Escartín, Pedro Chamorro‐Posada

In communication networks many different channels must share a limited amount of resources. In order to allow for multiple simultaneous communications, multiple access techniques are routinely employed. With quantum communication, it is possible to share a new kind of resource. All of the system channels can be accommodated into a single channel in a larger Hilbert space. In the scheme, a single line combines the information of all the users, and, at the receiver, the original quantum channels are recovered. The given multiplexer/demultiplexer circuit can perform this n qubits to qudit transformation. Connections with superdense coding and classical multiple access schemes are discussed.

arXiv:quant-ph/0701145•Jan 22, 2007•4 citations

Experimental Space-Division Multiplexed Polarization-Entanglement Distribution through 12 Paths of a Multicore Fiber

Evelyn A. Ortega, Krishna Dovzhik, Jorge Fuenzalida +6 more

The development and wide application of quantum technologies highly depend on the capacity of the communication channels distributing entanglement.Space-division multiplexing (SDM) enhances data channel transmission capacity in classical telecommunication and bears the potential to transfer the idea to quantum communication using current infrastructure.Here, we demonstrate a SDM of polarizationentangled photons over a 411 m long 19-core multicore fiber distributing polarization-entangled photon pairs through up to 12 channels simultaneously.The quality of the multiplexed transfer is evidenced by high polarization visibility and Clauser-Horne-Shimony-Holt (CHSH) Bell inequality violation for each pair of opposite cores.Our distribution scheme shows high stability over 24 h without any active polarization stabilization and can be effortlessly adapted to a higher number of channels.This technique increases the quantum-channel capacity and allows the reliable implementation of quantum networks of multiple users based on a single entangled photon pair source.

arXiv:2103.10791•PRX Quantum•Dec 21, 2021•29 citations

Quantum multiplexing and aggregation in quantum networking

William J. Munro, Nicoló Lo Piparo, Kae Nemoto

Quantum communication will be at the heart of many future quantum technologies providing the foundation to for them to coherently interact. Here we introduce the concepts of quantum multiplexing and aggregation for use in such quantum communication related tasks. Quantum multiplexing involves encoding multiple-qubits of information onto each transmitted photon and allows us to significantly reduce the effect channel losses have within those tasks. Next quantum aggregation allows quantum messages to be divided and transmitted in a coherent way over different paths when resources in given paths are limited. We will discuss potential implementations and the resources required.

Quantum Communications and Quantum Imaging•Oct 4, 2024•0 citations

All-optical quantum signal demultiplexer

Yin‐Hai Li, Wentan Fang, Zhi‐Yuan Zhou +8 more

Dense wavelength division multiplexing (DWDM) is one of the most successful methods for enhancing data transmission rates in both classical and quantum communication networks. Although signal multiplexing and demultiplexing are equally important, traditional multiplexing and demultiplexing methods are based on passive devices such as arrayed waveguides and fiber Bragg cascade filters, which, although widely used in commercial devices, lack any active tuning ability. In this work, we propose a signal demultiplexing method based on sum frequency generation (SFG) with two significant features: first, any signal from the common communication channel can be demultiplexed to a single user by switching the pump wavelength; second, a cheap high-performance detector can be used for signal detection. These two features were demonstrated by demultiplexing multi-channel energy-time entanglement generated by a micro-cavity silicon chip. High interference visibilities over three channels after demultiplexing showed that entanglement was preserved and verified the high performance of the demultiplexer, which will find wide application in high-capacity quantum communication networks.

arXiv:1803.00206•Mar 1, 2018•1 citation

Quantum Multiplexing

William J. Munro, Nicolo' Lo Plparo, Kae Nemoto

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)

Conference on Lasers and Electro-Optics•May 1, 2019•0 citations

Quantum-based satellite free space optical communication and microwave photonics

Arockia Bazil Raj, Vishal Sharma, Subhashish Banerjee

Spread-spectrum techniques are widely used in radio communication and telecommunication. Any signal like acoustic, electrical, and electromagnetic signal produced with a specific bandwidth is spread in frequency hence results in a wider bandwidth. Spread spectrum techniques are deployed in telecommunication because of many significant advantages, e.g., to achieve secure communications, to detect the eavesdropping, to resist natural interference, to bound power flux density for satellite down links and resistance to noise and jamming. In spread spectrum technique, frequency hopping (FH) is used as a basic modulation technique by which any telecommunication signal can be transmitted on a wider bandwidth (radio bandwidth) as compared to frequency value of the original signal. Spread spectrum techniques deploy FH, direct sequence (DS), or mix of both methods so that it can be used for multiple access and reduces the interference to other receivers to get the overall privacy. At the receiver side, the received signals are correlated to extract the original information being sent. The two main motivation behind spread spectrum are: to create anti-jamming for unauthenticated person and to provide low probability of interception. The classical data transmission can also be achieved by using quantum communication protocols like dense coding, quantum key distribution (QKD), and quantum teleportation. Most of these protocols use quantum states of light to transmit the information through optical fibers. The problem of channel access become apparent when number of users increases. In classical communication networks, when many users want to use the same channel at the same time, many multiple access methods are used. On the other side, quantum communication networks also deploy frequency and wavelength division multiple access techniques, hence each user make use of same channel at different frequencies and different time instance. In addition to this, many multiple access techniques employ orbital angular momentum of single photons and coherent states. Quantum spread spectrum multiple access scheme described here for optical fibers could be used for free-space data transmission. In this scheme, multiple users send their photons via same optical fiber, sharing their path, time window, and frequency band. A number of techniques have been proposed previously for data transmission for quantum optical communication which provides heavy losses while combining and separating the transmitted data from different users. The described scheme is developed to follow classical spread spectrum methods, and also follows add-drop architecture with simple extraction and combination points.

Institution of Engineering and Technology eBooks•Jun 1, 2019•5 citations
Multiplexing is an extremely well-established technique in the telecommunication industry [1] allowing multiple independent massages generated by multiple users to share a common transmission line. It works by the multiplexer dividing the capacity of the communication channel into a number of ‘logical’ channels which allow each of the users signal to be transmitted before a demultiplexer extracts them. There are various forms of it including space-division, frequency-division, time-division, code-division multiplexing to mention a few. Recently new form of ‘telecommunication’ has arisen. The principle of quantum mechanics and their associated quantum technologies [2] allow new forms of communication governed by superposition/entanglement and it is an open question as to where multiplexing will fit into it. Further those quantum principles may allow new forms of multiplexing unavailable to the classical world.
In communication networks many different channels must share a limited amount of resources. In order to allow for multiple simultaneous communications, multiple access techniques are routinely employed. With quantum communication, it is possible to share a new kind of resource. All of the system channels can be accommodated into a single channel in a larger Hilbert space. In the scheme, a single line combines the information of all the users, and, at the receiver, the original quantum channels are recovered. The given multiplexer/demultiplexer circuit can perform this n qubits to qudit transformation. Connections with superdense coding and classical multiple access schemes are discussed.
The development and wide application of quantum technologies highly depend on the capacity of the communication channels distributing entanglement.Space-division multiplexing (SDM) enhances data channel transmission capacity in classical telecommunication and bears the potential to transfer the idea to quantum communication using current infrastructure.Here, we demonstrate a SDM of polarizationentangled photons over a 411 m long 19-core multicore fiber distributing polarization-entangled photon pairs through up to 12 channels simultaneously.The quality of the multiplexed transfer is evidenced by high polarization visibility and Clauser-Horne-Shimony-Holt (CHSH) Bell inequality violation for each pair of opposite cores.Our distribution scheme shows high stability over 24 h without any active polarization stabilization and can be effortlessly adapted to a higher number of channels.This technique increases the quantum-channel capacity and allows the reliable implementation of quantum networks of multiple users based on a single entangled photon pair source.
Quantum communication will be at the heart of many future quantum technologies providing the foundation to for them to coherently interact. Here we introduce the concepts of quantum multiplexing and aggregation for use in such quantum communication related tasks. Quantum multiplexing involves encoding multiple-qubits of information onto each transmitted photon and allows us to significantly reduce the effect channel losses have within those tasks. Next quantum aggregation allows quantum messages to be divided and transmitted in a coherent way over different paths when resources in given paths are limited. We will discuss potential implementations and the resources required.
Dense wavelength division multiplexing (DWDM) is one of the most successful methods for enhancing data transmission rates in both classical and quantum communication networks. Although signal multiplexing and demultiplexing are equally important, traditional multiplexing and demultiplexing methods are based on passive devices such as arrayed waveguides and fiber Bragg cascade filters, which, although widely used in commercial devices, lack any active tuning ability. In this work, we propose a signal demultiplexing method based on sum frequency generation (SFG) with two significant features: first, any signal from the common communication channel can be demultiplexed to a single user by switching the pump wavelength; second, a cheap high-performance detector can be used for signal detection. These two features were demonstrated by demultiplexing multi-channel energy-time entanglement generated by a micro-cavity silicon chip. High interference visibilities over three channels after demultiplexing showed that entanglement was preserved and verified the high performance of the demultiplexer, which will find wide application in high-capacity quantum communication networks.
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)
Spread-spectrum techniques are widely used in radio communication and telecommunication. Any signal like acoustic, electrical, and electromagnetic signal produced with a specific bandwidth is spread in frequency hence results in a wider bandwidth. Spread spectrum techniques are deployed in telecommunication because of many significant advantages, e.g., to achieve secure communications, to detect the eavesdropping, to resist natural interference, to bound power flux density for satellite down links and resistance to noise and jamming. In spread spectrum technique, frequency hopping (FH) is used as a basic modulation technique by which any telecommunication signal can be transmitted on a wider bandwidth (radio bandwidth) as compared to frequency value of the original signal. Spread spectrum techniques deploy FH, direct sequence (DS), or mix of both methods so that it can be used for multiple access and reduces the interference to other receivers to get the overall privacy. At the receiver side, the received signals are correlated to extract the original information being sent. The two main motivation behind spread spectrum are: to create anti-jamming for unauthenticated person and to provide low probability of interception. The classical data transmission can also be achieved by using quantum communication protocols like dense coding, quantum key distribution (QKD), and quantum teleportation. Most of these protocols use quantum states of light to transmit the information through optical fibers. The problem of channel access become apparent when number of users increases. In classical communication networks, when many users want to use the same channel at the same time, many multiple access methods are used. On the other side, quantum communication networks also deploy frequency and wavelength division multiple access techniques, hence each user make use of same channel at different frequencies and different time instance. In addition to this, many multiple access techniques employ orbital angular momentum of single photons and coherent states. Quantum spread spectrum multiple access scheme described here for optical fibers could be used for free-space data transmission. In this scheme, multiple users send their photons via same optical fiber, sharing their path, time window, and frequency band. A number of techniques have been proposed previously for data transmission for quantum optical communication which provides heavy losses while combining and separating the transmitted data from different users. The described scheme is developed to follow classical spread spectrum methods, and also follows add-drop architecture with simple extraction and combination points.