Re: [Qirg] Question on the Network Model for Quantum Networks

On 27/03/2019 14:08, Stephen Botzko wrote:
> This whole area is new to me, so it's quite likely my question has 
> already been thought about.
>
> My understanding is that the goal of quantum networking is to create 
> (and possibly manage) entangled qubits.  Each entangled qubit is an 
> object that exists in precisely two locations at any point in time, 
> and has other properties (in particular fidelity).
>
The goal of quantum networking is to create, distribute, and manage 
*Bell Pairs* which consist of two qubits split across two locations. 
It's not one qubit in two places.

> I am wondering why we are trying to map classical networking concepts 
> like "quantum connections" and packet store+forward onto this problem 
> domain.  Has anyone looked at using a different framework (for 
> instance content defined networking)?  It might be a more natural 
> starting point.
>
The reason for starting with the standard framework is that it is well 
understood, there is a wealth of available literature on the topic, and 
also there are many experts who understand the subject. A lot of people 
have also noticed similarities between certain classical protocols like 
RSVP and the problem of distributing Bell Pairs so it seems natural to 
pursue this direction.

However, I wouldn't say that this is the only way to go or that some 
other framework might not be more optimal. In fact, Rod, one of the 
group's chair, has for example proposed to use a recursive architecture 
(https://www.nii.ac.jp/pi/n8/8_65.pdf). I haven't heard anyone suggest 
content defined networking for quantum yet, but if one were to come up 
I'm sure the group would also be interested in such a proposal.

> Also, I am thinking that it might be useful to construct a data model 
> that shows how entangled qubits are created, moved, destroyed, etc. 
> This could also show any physics constraints (for instance, cases 
> where bits need to be transported on the quantum link). The tutorial 
> shows some of this, but I think it is incomplete.
>
That is a good point, and might be worth adding to the "architectural 
principles" work which will be going on in the near future.

> Stephen
>
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