Quantum Zeno control of coherent dissociation

TL;DR

This paper demonstrates that strong phase noise can suppress the coherent dissociation of an atom-molecule Bose-Einstein condensate through a Bose-enhanced Quantum Zeno effect, highlighting a novel control mechanism via phase noise.

Contribution

It introduces a new method of controlling dissociation in BECs using phase noise to induce a Quantum Zeno effect, focusing on phase formation suppression.

Findings

Strong phase noise suppresses dissociation via Quantum Zeno effect.

Suppression occurs when phase-noise intensity exceeds inverse correlation time.

The mechanism is purely phase noise, different from previous phase-diffusion control.

Abstract

We study the effect of dephasing on the coherent dissociation dynamics of an atom-molecule Bose-Einstein condensate. We show that when phase-noise intensity is strong with respect to the inverse correlation time of the stimulated process, dissociation is suppressed via a Bose enhanced Quantum Zeno effect. This is complementary to the quantum zeno control of phase-diffusion in a bimodal condensate by symmetric noise (Phys. Rev. Lett. {\bf 100}, 220403 (2008)) in that the controlled process here is phase-{\it formation} and the required decoherence mechanism for its suppression is purely phase noise.