Entanglement Assisted Non-local Optical Interferometry in a Quantum Network
arXiv:2509.09464 · doi:10.1038/s41586-026-10171-w
Abstract
The sensitivity of non-local optical measurements at low light intensities, such as those involved in long baseline telescope arrays, can be improved by using remote entanglement. Here, we demonstrate the use of entangled quantum memories in a quantum network of Silicon-vacancy centers in diamond nano-cavities to experimentally perform such non-local phase measurements. Specifically, we combine the generation of event-ready remote quantum entanglement, photon mode erasure that hides the "which-path" information of temporally and spatially separated incoming optical modes, and non-local, non-destructive photon heralding enabled by remote entanglement to perform a proof-of-concept entanglement-assisted differential phase measurement of weak incident light between two spatially separate stations. Demonstrating successful operation of the remote phase sensing protocol with a fiber link baseline up to 1.55 km, our results open the door for a new class of quantum enhanced imaging applications.
Updated Ref [45]
References in corpus (27)
- The Quantum Internet
- Advances in Quantum Metrology
- First M87 Event Horizon Telescope Results. II. Array and Instrumentation
- Realization of a multi-node quantum network of remote solid-state qubits
- Experimental demonstration of memory-enhanced quantum communication
- Quantum repeaters: From quantum networks to the quantum internet
- Quantum advantage in learning from experiments
- First Results from the CHARA Array. II. A Description of the Instrument
- Longer-Baseline Telescopes Using Quantum Repeaters
- Multiplexed Memory-Insensitive Quantum Repeaters
- Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
- Quantum network nodes based on diamond qubits with an efficient nanophotonic interface
- Robust multi-qubit quantum network node with integrated error detection
- Optical Interferometry with Quantum Networks
- A multinode quantum network over a metropolitan area
- Metropolitan-scale heralded entanglement of solid-state qubits
- Quantum Metropolitan Optical Network based on Wavelength Division Multiplexing
- Quantum-Assisted Telescope Arrays
- Quantum Nonlocality in Weak-Thermal-Light Interferometry
- Tutorial: Remote entanglement protocols for stationary qubits with photonic interfaces
- Intensity interferometry for holography with quantum and classical light
- Random time series in Astronomy
- Universal distributed blind quantum computing with solid-state qubits
- Quantum Photonic Circuits Integrated with Color Centers in Designer Nanodiamonds
- Optical Entanglement of Distinguishable Quantum Emitters
- Superadditive Communication with the Green Machine: A Practical Demonstration of Nonlocality without Entanglement
- Testing quantum theory on curved space-time with quantum networks