Application of quantum inequalities to quantum optics

Abstract

We establish a connection between quantum inequalities (known from quantum field theory on curved spacetimes) and the degree of squeezing in quantum-optical experiments. We prove an inequality which binds the reduction of the electric-field fluctuations to their duration. The bigger the level of fluctuations-suppression the shorter its duration. As an example of the application of this inequality in the case of squeezed light whose phase is controlled with 1% accuracy we derive a limit of -15dB on the allowed degree of squeezing.

14 pages, 2 figures (improved format)

References in corpus (3)

• An ultra-sensitive pulsed balanced homodyne detector: Application to time-domain quantum measurements
• A Quantum Weak Energy Inequality for Dirac fields in curved spacetime
• Quantum Inequalities for the Electromagnetic Field

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• Negative Energy Densities in Quantum Field Theory
• Quantum energy inequalities and local covariance II: Categorical formulation
• Effects of Vacuum Fluctuation Suppression on Atomic Decay Rates
• Subvacuum effects of the quantum field on the dynamics of a test particle
• Negative Energy in Superposition and Entangled States
• Recoherence by Squeezed States in Electron Interferometry
• Decoherence and Recoherence in Model Quantum Systems
• Balanced homodyne detectors in QFT
• Balanced homodyne detectors and Casimir energy densities
• Testing a Quantum Inequality with a Meta-analysis of Data from Squeezed Light
• Quantum Energy Inequalities and Stability Conditions in Quantum Field Theory