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
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.
Awarded by UK EPSRC
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.