The Quantum Internet

Charter for Research Group

Quantum Internet Research Group Charter

The Quantum Internet will bring new communication and remote

computation capabilities such as quantum secure communication,

distributed quantum computing, and quantum-enhanced physical sensor

systems. A key focus area for quantum networks will be cryptographic

functions such as quantum key distribution or quantum byzantine


Work towards a Quantum Internet is well underway in physics

laboratories and in theory groups. The next step is network

engineering. Being embedded within the IRTF community helps in

achieving this goal in two ways:

The IRTF community has extensive experience in network engineering.

Whilst quantum networks operate on a completely new set of physical

principles, many lessons have been learned throughout the Internet’s

history and many of them will be relevant to the development of the

Quantum Internet.

Quantum networks will be embedded within non-quantum (classical)

networks, as they require classical connectivity for control and

management purposes. Thus, the IRTF’s experience in classical

network design and architecture will be beneficial.

Overall the goal of the QIRG is to address the question of how to

design and build quantum networks. Some of the problems that need to

be addressed include:

Routing: Finding an optimal path in a quantum network is a

non-trivial problem due to the requirement of achieving a certain

fidelity threshold and the low coherence time of quantum memories.

There are a number of proposals and which routing schemes are

appropriate for which circumstances needs to be assessed.

Resource allocation: All networks have a finite pool of resources,

and quantum networks bring new resource considerations to the

table, such as the coherence time of quantum memories. Some of the

routing proposals already include a notion of dynamic traffic in

the network, but it is worth making a distinction.

Connection establishment: Quantum networks deliver entangled states

instead of packets so the connection semantics may be different.

How does such a request look like as it propagates across the


Interoperability: Different networks based on different hardware

(ion traps, atomic ensembles, nitrogen vacancy centres) and using

different protocols are currently being designed and built. How do

we ensure a long-lived internetwork develops?

Security: Quantum networks bring enhanced security for

applications. Therefore, the question of the security of the

network itself must also be addressed. Are quantum repeater

networks inherently more or less vulnerable in operations than

classical networks?

API design: Classical sockets are built around the concept of bits.

What should an API for entangled states look like given new

considerations such as fidelity, and the low coherence time of

quantum memories?

Some other problems that can be tackled by the QIRG:

Applications for a Quantum Internet: an important item on

the agenda for the community is analyzing how to turn the

low-level, abstract functions of quantum communication into services

provided by the Quantum Internet, including establishing required

data rates and fidelities, with specific use cases incorporating

quantum services into complete information systems.

Multi-party states and multi-party transfers such as network coding:

rather than simple, independent point-to-point transfers, how can we

create and use more complex states?

Outputs and Milestones

Concrete work items that QIRG may produce include:

An architectural framework delineating network node roles and

definitions, to build a common vocabulary and serve as the first

step toward a quantum network architecture.

Wehner, Elkhouss and Hanson have created a roadmap of technical

capability milestones for quantum networks. Mapping these

milestones to concrete use cases will help to determine the order

and timing of classical protocols that will be needed. For example,

consider prepare-and-measure networks; what data rates, fidelities

are needed to e.g. make a useful position verification service, and

how would you incorporate that into a complete information system?

Finally, QIRG will serve as a coordination point with other standards

organizations that are working on standardization of quantum networks.


QIRG will hold 2-3 meetings per year, online or in person, in

accordance with current best practice.

Membership Policy


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