研究目的
To experimentally demonstrate how sensing of an averaged phase shift among four distributed nodes benefits from an entangled quantum network.
研究成果
The results demonstrate experimentally how mode entanglement, in the form of squeezing of a collective quadrature of a multimode light field, can enhance the sensitivity in a distributed sensing scenario. The techniques demonstrated have direct applications in areas such as molecular tracking and quantum networks of atomic clocks.
研究不足
The main limitation of the scheme when applied to realistic scenarios will be the channel efficiency, which will eventually limit the achievable gain. Other technical challenges include supplying phase-locked local oscillators to each site that are separate from the probe beams and suppressing the spectral parts of the squeezed light that does not contribute to the sensing.
