This paper introduces a new notion of quantum recursion of which the control flow of the computation is quantum rather than classical as in the notions of recursion considered in the previous studies of quantum programming. A typical example is recursive quantum walks, which are obtained by slightly modifying the construction of the ordinary quantum walks. The operational and denotational seman...

Quantum computation has shown much promise at providing, at least in some cases, a significant advantage over classical computation. However, the nature of quantum computation is still far from being well understood. In order to develop quantum algorithms effectively, it is important to understand the true nature of the differences between classical and quantum computation. We investigate these...

A superspace formulation of the stochastic quantisation method of Parisi and Wu is presented for the scalar and gauge field theories.

DESIGNS FOR AN MPEG VIDEO CODER Y S Saw J M Hannah P M Grant Electrical Engineering, University of Edinburgh, Scotland Abstract In MPEG video encoding, e cient bu ering and rate control is especially crucial for constant bit rate (CBR) applications such as non-ATM (Asynchronous Transfer Mode) channels and satellite communication channels. In a CBR environment, compressed video data, which is in...

Starting with its classical parafermion algebra, we consider the quantisation of the SL(2, R)/U(1) WZNW black hole model.