Quantum Zeno effect in cavity quantum electrodynamics: Experimental proposal with nonideal cavities and detectors

Abstract

We propose an experiment with two coupled microwave cavities and a "tunneling" photon observed by the passage of Rydberg atoms. We model the coupled cavities as in Ref.[1] and include dissipative effects as well as limited detection efficiency. We also consider realistic finite atom-field interaction times and provide for a simple analytical expression for the photon "tunneling" probability including all these effects. We show that for sufficiently small dissipation constants the effect can be observed with current experimental facilities.

Optimizing microwave photodetection: input–output theory

“…ω r , measurement can be seen as a continuous projection and therefore freezes the system dynamics. This effect is well known as the quantum zeno effect [63][64][65][66][67][68][69]. If we match the rates and look at the correlation between measurement time and the rate of incoming photons, we see a saturation at the point when the rate of incoming photons becomes greater than the measurement time, since then the arrival of a photon at the detector during the measurement time is guaranteed (see figure 2(b)).…”

“…On the other hand, if γ 1 ≫ ω r , measurement can be seen as a continuous projection and therefore freezes the system dynamics. This effect is well known as the quantum zeno effect [62][63][64][65][66][67][68]. If we match the rates and look at the correlation between measurement time and the rate of incoming photons, we see a saturation at the point…”

Anti-symmetry consideration on the preservation of entanglement of spin system

“…While the entanglement provides undeniable advantages to achieve quantum computers its considerable sensitivity to system-environment interactions, which induces decohering effects in the quantum evolution, is the main impasse to preserve entanglement. Therefor to struggle against the effect of decoherence and to control and maintain the entanglement, various strategies have been proposed, e.g., quantum error correcting codes [5,6,7,8,9], decoherence-free subspaces [10,11,12], weak measurements [13,14,15,16,17], quantum zeno and super zeno effect [18,19,20,21,22] and quantum bang-bang control [23,24,25]. Inspired by refocusing techniques from NMR [26] Vitali et al [25] put forward an interesting practical scheme to control and suppress decoherence using tailored external forcing acting as pulses.…”

Entanglement preservation of two coupled modes

“…In Ref. [16] the Quantum Zeno effect in a bipartite system, composed of two couple microwave cavities (A and B), is studied. It is shown how to inhibit the transition of a single photon, prepared initially in cavity A, by measuring the number of photons on cavity B.…”