English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Non-Hermitian dynamics has been widely studied to enhance the precision ofquantum sensing; and non-reciprocity can be a powerful resource fornon-Hermitian quantum sensing, as non-reciprocity allows to arbitrarily exceedthe fundamental bound on the measurement rate of any reciprocal sensors. Herewe establish fundamental limits on signal-to-noise ratio for reciprocal andnon-reciprocal non-Hermitian quantum sensing. In particular, for two-modelinear systems with two coherent drives, an approximately attainable uniformbound on the best possible measurement rate per photon is derived for bothreciprocal and non-reciprocal sensors. This bound is only related to thecoupling coefficients and, in principle, can be made arbitrarily large. Ourresults thus demonstrate that a conventional reciprocal sensor with two drivescan simulate any non-reciprocal sensor. This work also demonstrates a clearsignature on how the excitation signals affect the signal-to-noise ratio innon-Hermitian quantum sensing.

Fundamental limits for reciprocal and non-reciprocal non-Hermitian quantum sensing