Optimal Squeezing in Resonance Fluorescence via Atomic-State Purification

Abstract

Squeezing of atomic resonance fluorescence is shown to be optimized by a properly designed environment, which can be realized by a quasi-resonant cavity. Optimal squeezing is achieved if the atomic coherence is maximized, corresponding to a pure atomic quantum state. The atomic-state purification is achieved by the backaction of the cavity field on the atom, which increases the atomic coherence and decreases the atomic excitation. For realistic cavities, the coupling of the atom to the cavity field yields a purity of the atomic state of more than 99%. The fragility of squeezing against dephasing is substantially reduced in this scenario, which may be important for various applications.

6 pages including supplemental information, 3 figures. Accepted for PRL

References in corpus (8)

• Direct estimations of linear and non-linear functionals of a quantum state
• Universal Quantum Estimator
• Dephasing of quantum dot exciton polaritons in electrically tunable nanocavities
• A device for feasible fidelity, purity, Hilbert-Schmidt distance and entanglement witness measurements
• Observation of squeezed light from one atom excited with two photons
• Intensity-field correlation of single-atom resonance fluorescence
• Stationary inversion of a two level system coupled to an off-resonant cavity with strong dissipation
• A measurement scheme for purity based on two two-body gates

Cited by in corpus (9)

• Large suppression of quantum fluctuations of light from a single emitter by an optical nanostructure
• Degenerate squeezing in a dual-pumped integrated microresonator: parasitic processes and their suppression
• Optimal Squeezing in the Resonance Fluorescence of Single Photon Emitters
• Role of generalized parity in the symmetry of fluorescence spectrum from two-level systems under periodic frequency modulation
• Vibrational enhancement of quadrature squeezing and phase sensitivity in resonance fluorescence
• Cavity-assisted enhanced and dephasing immune squeezing in the resonance fluorescence of a single quantum dot
• Phase control of squeezing in fluorescence radiation
• Optimal Photon blockade on the maximal atomic coherence
• Coherence-mediated squeezing of cavity field coupled to a coherently driven single quantum dot