Experimental nonlocal measurement of a product observable
arXiv:1908.04515 · doi:10.1364/OPTICA.6.001199
Abstract
Nonlocal measurement, or instantaneous measurement of nonlocal observables, is a considerably difficult task even for a simple form of product observable since relativistic causality prohibits interaction between spacelike separate subsystems. Following a recent proposal for effectively creating the von Neumann measurement Hamiltonian of nonlocal observables [Brodutch and Cohen, Phys. Rev. Lett. 116, 070404 (2016)], here we report a proof-of-principle demonstration of nonlocally measuring a product observable using linear optics without the violation of relativistic causality. Our scheme provides a feasible approach to perform nonlocal measurements via quantum erasure with linear optics.
arXiv comment4 pages, 3 figures, accepted for publication in Optica
References in corpus (16)
- Quantum Nonlocality without Entanglement
- Feasible Entanglement Purification for Quantum Communication
- 18-qubit entanglement with photon's three degrees of freedom
- A double-slit quantum eraser
- A quantum delayed choice experiment
- Demonstration of an optical quantum controlled-NOT gate without path interference
- Quantum thermal transistor
- Causal and localizable quantum operations
- Deterministic polarization-entanglement purification using spatial entanglement
- Instantaneous measurement of non-local variables
- Causality Constraints on Nonlocal Quantum Measurements
- Nonlocal Measurements via Quantum Erasure
- Measurements of semi-local and non-maximally entangled states
- Entanglement consumption of instantaneous nonlocal quantum measurements
- Deterministic and Efficient Quantum Cryptography Based on Bell's Theorem
- Photonic realization of erasure-based nonlocal measurements