Optimal qubit circuits for quantum-enhanced telescopes
arXiv:2108.01170 · doi:10.1103/PhysRevA.108.052408
Abstract
We propose two optimal phase-estimation schemes that can be used for quantum-enhanced long-baseline interferometry. By using distributed entanglement, it is possible to eliminate the loss of stellar photons during transmission over the baselines. The first protocol is a sequence of gates using nonlinear optical elements, optimized over all possible measurement schemes to saturate the Cramér-Rao bound. The second approach builds on an existing protocol, which encodes the time of arrival of the stellar photon into a quantum memory. Our modified version reduces both the number of ancilla qubits and the number of gate operations by a factor of two.
14 pages, 9 figures
References in corpus (7)
- The Quantum Internet
- First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
- Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
- Quantum transduction of optical photons from a superconducting qubit
- Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout
- CHARA Array Measurements of the Angular Diameters of Exoplanet Host Stars
- Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope
Cited by in corpus (5)
- Quantum Internet: Technologies, Protocols, and Research Challenges
- Superresolution imaging with entanglement-enhanced telescopy
- Quantum-enabled optical large-baseline interferometry: applications, protocols and feasibility
- Random Distillation Protocols in Long Baseline Telescopy
- Quantum resolution limit of long-baseline imaging using distributed entanglement