Conference Proceedings

Deterministic purity evolution via weak measurement for bipartite quantum systems

Charles Hill, Jason Ralph, L Cohen (ed.)

NOISE AND FLUCTUATIONS IN PHOTONICS, QUANTUM OPTICS, AND COMMUNICATIONS | SPIE-INT SOC OPTICAL ENGINEERING | Published : 2007

Abstract

In this paper we consider feedback control algorithms for the deterministic purification of a bipartite state consisting of two qubits, when the observer has access to only one of the qubits. We show that Hamiltonian feedback control can be used to produce deterministic evolution of the purity of either qubit individually, or both together.

University of Melbourne Researchers

Grants

Awarded by UK EPSRC


Funding Acknowledgements

The authors would like to thank Kurt Jacobs and H. M. Wiseman and acknowledge that this work was supported by UK EPSRC grant number EP/C012674/1.