Guang-Can Guo

TL;DR: The 1/f noise for a microscopic graphene QD is substantially larger than that for a macroscopic graphene field-effect transistor (FET), increasing linearly with temperature, thus affecting the coherency of graphene nano-devices.

TL;DR: In this article, a Heisenberg-scaling method was proposed to measure the parameter governing the nonlinear coupling between two different optical modes, and the authors demonstrated that the extracted classical Fisher information (FI) can saturate the quantum FI embedded in the combined state after coupling.

TL;DR: Evidence is presented in support of the idea that the underlying physics of stimulated emission is simply the constructive interference due to photon indistinguishability, and the observed signal enhancement upon the input of photons can be interpreted as a result of multiphoton interference of the input photons and the otherwise spontaneously emitted photon from the amplifier.

TL;DR: A transient and high sensitivity sensor based on high-Q microcavity is proposed and studied theoretically and it's demonstrated that the transient sensor can sense coupling region, external linear variation together with the speed and the size of a nanoparticle.

TL;DR: In this paper, a collective measurement scheme for estimating the amount of coherence in quantum states, which requires entangled measurements on two copies of the state, was proposed, leading to higher precision in a large parameter range for estimating established coherence quantifiers of qubit and qutrit states.