Quantum enhanced beam tracking surpassing the Heisenberg uncertainty limit
arXiv:2501.14104 · doi:10.1103/PhysRevLett.134.190804
Abstract
Determining a beam's full trajectory requires tracking both its position and momentum (angular) information. However, the product of position and momentum uncertainty in a simultaneous measurement of the two parameters is bound by the Heisenberg uncertainty limit (HUL). In this work, we present a proof-of-principle demonstration of a quantum-enhanced beam tracking technique, leveraging the inherent position and momentum entanglement between photons produced via spontaneous parametric down-conversion (SPDC). We show that quantum entanglement can be exploited to achieve a beam tracking accuracy beyond the HUL in a simultaneous measurement. Moreover, with existing detection technologies, it is already possible to achieve near real-time beam tracking capabilities at the single-photon level. The technique also exhibits high resilience to background influences, with negligible reduction in tracking accuracy even when subjected to a disruptive beam that is significantly brighter than SPDC.
7 pages, 5 figures
References in corpus (10)
- Imaging high-dimensional spatial entanglement with a camera
- Advances in quantum imaging
- Coincidence velocity map imaging using Tpx3Cam, a time stamping optical camera with 1.5 ns timing resolution
- Tutorial: Optical quantum metrology
- Quantum limits in the measurement of very small displacements in optical images
- Transverse Entanglement Migration in Hilbert Space
- Imaging and time stamping of photons with nanosecond resolution in Timepix based optical cameras
- Einstein-Podolsky-Rosen paradox in twin images
- Correlations between detectors allow violation of the Heisenberg noise-disturbance principle for position and momentum measurements
- Focusing in Arthurs-Kelly-type Joint Measurements with Correlated Probes