How many atoms get excited when they decay?

Abstract

We analyze the time evolution of a two-level system prepared in a superposition of its ground state and radiatively unstable excited state. We show that by choosing appropriate means of detection of the radiated field, we can steer the evolution of the emitter and herald its preparation in the fully excited state. We determine the probability for the occurrence of this "excitation during the decay" of a remote emitter.

11 pages (including appendix), 6 figures

References in corpus (3)

• Steering, Entanglement, Nonlocality, and the EPR Paradox
• Initialization by measurement of a two-qubit superconducting circuit
• Heralded quantum gates with integrated error detection in optical cavities

Cited by in corpus (1)

• Quantum trajectories for propagating Fock states