Patent ID: 8184986

Claim:
An information transmission arrangement comprising: an information particle source; a filter provided at a first location, the filter being configured only to allow particles having a certain value of a parameter to pass therethrough; and a detection system provided at a second location, the detection system comprising a splitter, a detector, and first and second paths defined between the splitter and the detector, the splitter being arranged to direct an incoming information particle along the first or second path depending upon the value of the parameter of the incoming particle; and a manipulation arrangement located on at least the first path, the manipulation arrangement comprising either a rotator arrangement provided on the first path and operable to alter the direction of polarisation of particles passing along the first path, or a phase alteration component that is arranged to alter the effective length of the first path, the manipulation arrangement being operable to manipulate the portions of the wavefunction corresponding to particles travelling along the first and second paths so that they interfere with each other at or before the detector, wherein the information particle source is configured to emit particles, so that a first particle in the particle pair is emitted in a first direction, towards the filter, and a second particle in the particle pair is emitted in a second direction, towards the detection system; and wherein the detection system is operable to distinguish between an incident particle having a determined value of the parameter and an incident particle having an undetermined value of the parameter, the undetermined value indicating that the wavefunction of the incident particle remains in a superposition of states.