Tests of Bell inequality with arbitrarily low photodetection efficiency and homodyne measurements

Abstract

We show that hybrid local measurements combining homodyne measurements and photodetection provide violations of a Bell inequality with arbitrarily low photodetection efficiency. This is shown in two different scenarios: when one part receives an atom entangled to the field mode to be measured by the other part and when both parts make similar photonic measurements. Our findings promote the hybrid measurement scenario as a candidate for loophole-free Bell tests beyond previous expectations.

6 pages, 2 figures. Published version

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Cited by in corpus (9)

• Bell nonlocality
• Violation of Bell-CHSH inequality using imperfect photodetectors with optical hybrid states
• Exponentially decreasing critical detection efficiency for any Bell inequality
• Realistic loophole-free Bell test with atom-photon entanglement
• Heralded Mapping of Photonic Entanglement into Single Atoms in Free Space: Proposal for a Loophole-Free Bell Test
• Graph-theoretic approach to Bell experiments with low detection efficiency
• The minimal communication cost for simulating entangled qubits
• Detection Efficiency Bounds in (Semi-)Device-Independent Scenarios
• Loss-tolerant hybrid measurement test of CHSH inequality with weakly amplified N00N states