Year: 2002
Type: article
Abstract: We present a protocol to generate and control quantum entanglement between the states of two subsystems (the system $\mathcal{S})$ by making measurements on a third subsystem (the monitor $\mathcal{M}),$ interacting with $\mathcal{S}.$ For the sake of comparison we consider first an ideal, or instantaneous projective measurement, as postulated by von Neumann. Then we compare it with the more realistic or generalized measurement procedure based on photocounting on $\mathcal{M}.$ Further we consider that the interaction term (between $\mathcal{S}$ and $\mathcal{M})$ contains a quantum nondemolition variable of $\mathcal{S}$ and discuss the possibility and limitations for reconstructing the initial state of $\mathcal{S}$ from information acquired by photocounting on $\mathcal{M}.$
Source: Physical Review A
Institution: Universidade Federal de São Carlos
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2140607151