Idler-free channel position finding

Abstract

Entanglement is a powerful tool for quantum sensing, and entangled states can greatly boost the discriminative power of protocols for quantum illumination, quantum metrology, or quantum reading. However, entangled state protocols generally require the retention of an idler state, to which the probes are entangled. Storing a quantum state is difficult and so technological limitations can make protocols requiring quantum memories impracticable. One alternative is idler-free protocols that utilise non-classical sources but do not require any idler states to be stored. Here we apply such a protocol to the task of channel position finding. This involves finding a target channel in a sequence of background channels, and has many applications, including quantum sensing, quantum spectroscopy, and quantum reading.

13 pages, 8 figures. Similar to published version

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Cited by in corpus (8)

• Optimal quantum strategy for locating Unruh channels
• Quantum limits of covert target detection
• Idler-Free Multi-Channel Discrimination via Multipartite Probe States
• Analytical Bounds for Dynamic Multi-Channel Discrimination
• Quantum channel position finding using single photons
• Quantum-enhanced cluster detection in physical images
• Symplectic decomposition from submatrix determinants
• Bounding the benefit of adaptivity in quantum metrology using the relative fidelity