Concurrent Quantum Programming in Haskell

This paper applies established techniques for concurrent programming in Haskell to the case of Concurrent Quantum Programming. The foundation of the approach is an extension to Concurrent Quantum Programming of the technique of “virtual values ” proposed by Amr Sabry for quantum programming in Haskell. The basic idea is to encapsulate quantum values within MVars, the monadic variables that support thread synchronization and mutually exclusive accesses to shared references. In this way, quantum processes can be concurring to have access to quantum values and we will be applying the now established quantum programming paradigm of “control is classic, data is quantum ” to the concurrent and distributed quantum programming domain: the case in focus is that the control of concurrency is classical control, while shared data between quantum processes are quantum data. We illustrate the use of the proposed approach by programming sample algorithms for quantum teleportation and quantum cryptographic key distribution. 1.