Quantum enhanced beam tracking surpassing the Heisenberg uncertainty limit

• URL: http://arxiv.org/abs/2501.14104v2
• Date: Tue, 15 Apr 2025 21:17:54 GMT
• Title: Quantum enhanced beam tracking surpassing the Heisenberg uncertainty limit
• Authors: Yingwen Zhang, Duncan England, Noah Lupu-Gladstein, Frederic Bouchard, Guillaume Thekkadath, Philip J. Bustard, Ebrahim Karimi, Benjamin Sussman,
• Abstract summary: Quantum entanglement can be exploited to achieve a beam tracking accuracy beyond the Heisenberg uncertainty limit.<n>It is already possible to achieve near real-time beam tracking capabilities at the single-photon level.<n>The technique exhibits high resilience to background influences, with negligible reduction in tracking accuracy even when subjected to a disruptive beam.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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.

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