Minimum Disturbance Measurement without Post-Selection

Abstract

We propose and demonstrate a linear optical device which deterministically performs optimal quantum measurement or minimum disturbance measurement on a single-photon polarization qubit with the help of an ancillary path qubit introduced to the same photon. We show theoretically and experimentally that this device satisfies the minimum disturbance measurement condition by investigating the relation between the information gain (estimation fidelity) and the state disturbance due to measurement (operation fidelity). Our implementation of minimum disturbance measurement is postselection-free in the sense that all detection events are counted toward evaluation of the estimation fidelity and the operation fidelity, i.e., there is no need for coincidence postselection of the detection events.

4 pages, 3 figures, 1 table

References in corpus (12)

• A Delayed Choice Quantum Eraser
• Quantum State Disturbance vs. Information Gain: Uncertainty Relations for Quantum Information
• Optical Simulation of Quantum Logic
• A Bell-type test of energy-time entangled qutrits
• Demonstration of Non-Deterministic Quantum Logic Operations using Linear Optical Elements
• Fidelity balance in quantum operations
• Quantitative wave-particle duality and non-erasing quantum erasure
• Optimal state estimation for d-dimensional quantum systems
• Single-photon two-qubit "entangled'' states: preparation and measurement
• Experimental realization of a minimal disturbance quantum measurement
• Quantum interference with beamlike type-II spontaneous parametric down-conversion
• Experimental demonstration of coherent state estimation with minimal disturbance

Cited by in corpus (10)

• Experimental Test of Error-Disturbance Uncertainty Relations by Weak Measurement
• Balance between information gain and reversibility in weak measurement
• Observing the "quantum Cheshire cat" effect with noninvasive weak measurement
• Coherent and Dynamic Beam Splitting based on Light Storage in Cold Atoms
• Local measurement uncertainties impose a limit on non-local quantum correlations
• Quantum measurement and uncertainty relations in photon polarization
• Direct tomography of quantum states and processes via weak measurements of Pauli spin operators on an NMR quantum processor
• Derivative of the disturbance with respect to information from quantum measurements
• Allowed region and optimal measurement for information versus disturbance in quantum measurements
• Nonlocal Generalized Quantum Measurements of Spin Products Without Maximal Entanglement