Macroscopic quantum jumps and entangled state preparation

Abstract

Recently we predicted a random blinking, i.e. macroscopic quantum jumps, in the fluorescence of a laser-driven atom-cavity system [Metz et al., Phys. Rev. Lett. 97, 040503 (2006)]. Here we analyse the dynamics underlying this effect in detail and show its robustness against parameter fluctuations. Whenever the fluorescence of the system stops, a macroscopic dark period occurs and the atoms are shelved in a maximally entangled ground state. The described setup can therefore be used for the controlled generation of entanglement. Finite photon detector efficiencies do not affect the success rate of the state preparation, which is triggered upon the observation of a macroscopic fluorescence signal. High fidelities can be achieved even in the vicinity of the bad cavity limit due to the inherent role of dissipation in the jump process.

14 pages, 12 figures, proof of the robustness of the state preparation against parameter fluctuations added, figure replaced

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Cited by in corpus (13)

• Harnessing symmetry to control quantum transport
• Ground-state blockade of Rydberg atoms and application in entanglement generation
• Photon-Mediated Interaction between Two Distant Atoms
• Effect of frequency mismatched photons in quantum information processing
• Analyzing quantum jumps of one and two atoms strongly coupled to an optical cavity
• An atomic symmetry-controlled thermal switch
• Stochastic master equation for a probed system in a cavity
• Production of entanglement in Raman three-level systems using feedback
• Atomic cluster state build up with macroscopic heralding
• Entangling distant quantum dots using classical interference
• Protecting subspaces by acting on the outside
• An unconventional geometric phase gate with two nonresonant quantum dots trapped in a photonic crystal cavity
• Quantum jumps induced by the center-of-mass motion of a trapped atom