Tobias Gehring

TL;DR: This review begins by reviewing protocols of quantum key distribution based on discrete variable systems, and considers aspects of device independence, satellite challenges, and high rate protocols based on continuous variable systems.

TL;DR: Quantum cryptography is arguably the fastest growing area in quantum information science as mentioned in this paper, and many quantum key distribution protocols have been proposed, both theoretically and experimentally, over the last few decades.

TL;DR: In this article, the authors demonstrate deterministic quantum phase sensing with a precision beyond what is attainable with separable probes using a four-mode entangled continuous-variable state, reaching a measurement precision that is beyond what can be achieved by separate individual probes.

TL;DR: In this paper, an enhancement of the sensitivity of continuous-wave stimulated Raman spectroscopy by reducing the quantum noise of the probing light below the shot-noise limit by means of amplitude squeezed states of light was demonstrated.

TL;DR: In this paper, the authors used a crystalline whispering gallery mode resonator made of lithium niobate as a degenerate parametric oscillator to achieve 1.4 dB noise reduction below the shot-noise level.