Ultra-sensitive phase estimation with white light

Abstract

An improvement of the scheme by Brunner and Simon [Phys. Rev. Lett. 105, 010405 (2010)] is proposed in order to show that quantum weak measurements can provide a method to detect ultrasmall longitudinal phase shifts, even with white light. By performing an analysis in the frequency domain, we find that the amplification effect will work as long as the spectrum is large enough, irrespective of the behavior in the time domain. As such, the previous scheme can be notably simplified for experimental implementations.

References in corpus (12)

• Beating the Standard Quantum Limit with Four Entangled Photons
• Ultrasensitive Beam Deflection Measurement via Interferometric Weak Value Amplification
• Entanglement-free Heisenberg-limited phase estimation
• Experimental joint weak measurement on a photon pair as a probe of Hardy's Paradox
• A Quantum-Enhanced Prototype Gravitational-Wave Detector
• Complex weak values in quantum measurement
• Weak values and the Leggett-Garg inequality in solid-state qubits
• Undoing a weak quantum measurement of a solid-state qubit
• Direct observation of Hardy's paradox by joint weak measurement with an entangled photon pair
• Optimizing the Signal to Noise Ratio of a Beam Deflection Measurement with Interferometric Weak Values
• Modular values and weak values of quantum observables
• Weak values of electron spin in a double quantum dot