Are there emulators for quantum networks?

Is it possible to emulate a quantum network over a classic network?

Yes. The following projects are currently available:

SimulaQron

SimulaQron is a distributed simulation of the end nodes in a future quantum internet with the specific goal to explore application development. The end nodes in a quantum internet are few qubit processors, which may exchange qubits using a quantum internet. Specifically, SimulaQron allows the installation of a local simulation program on each computer in the network that provides the illusion of having a local quantum processor to potential applications. The local simulation programs on each classical computer connect to each other classically, forming a simulated quantum internet allowing the exchange of simulated qubits between the different network nodes, as well as the creation of simulated entanglement.

Squanch

The Simulator for Quantum Networks and Channels (SQUANCH) is an open-source Python library for creating parallelized simulations of distributed quantum information processing. The framework includes many features of a general-purpose quantum computing simulator, but it is optimized specifically for simulating quantum networks. It includes functionality to allow users to easily design complex multi-party quantum networks, extensible classes for modeling noisy quantum channels, and a multiprocessed NumPy backend for performant simulations.

NetSquid

Currently under development at QuTech, NetSquid is the world’s first network simulator that is capable of simulating the decay of quantum information over time together with noisy operations and stochastic feedback loops. Its primary use is the prediction of the performance of quantum network protocols in a physically-realistic setting.