量子增强的生物分子手性鉴别

Symmetric and asymmetric discrimination of bosonic loss: Toy applications to biological samples and photo-degradable materials

We consider quantum discrimination of bosonic loss based on both symmetric and asymmetric hypothesis testing. In both approaches, an entangled resource is able to outperform any classical strategy based on coherent-state transmitters in the regime of low photon numbers. In the symmetric case, we then consider the low energy detection of bacterial growth in culture media. Assuming an exponential growth law for the bacterial concentration and the Beer-Lambert law for the optical transmissivity of the sample, we find that the use of entanglement allows one to achieve a much faster detection of gr…

通过破缺对称自旋动力学进行分子手性识别

Molecular chiral discrimination through symmetry-breaking spin dynamics

研究提出基于磁共振构建核自旋破缺对称动力学来确定单分子水平手性的方法，实验上利用自旋极化前后对映体动力学差异实现手性识别，有助于化学和生物学领域手性诱导性质研究。

Bounds on amplitude damping channel discrimination

Amplitude damping (AD) channels are good models for many physical scenarios, and so the development of protocols to discriminate between them is an important task in quantum information science. It is therefore important to bound the performance of such protocols. Since adaptivity has been shown to improve the performance of discrimination protocols, bounds on the distinguishability of AD channels must take this into account. In this paper, we use both channel simulation and a bound based on the diamond norm to significantly tighten the upper bound on the trace norm between the possible output…

实现量子限下的亚瑞利希识别任意强度的非相干源

Achieving quantum-limited sub-Rayleigh identification of incoherent sources with arbitrary intensities

本研究提出了一种基于量子切尔诺夫界的非相干源识别方法，通过SPADE测量和干涉仪旋转优化，实现亚瑞利希分辨能力的量子极限。

Emergence of molecular chirality due to chiral interactions in a biological environment

We explore the interplay between tunneling process and chiral interactions in the discrimination of chiral states for an ensemble of molecules in a biological environment. Each molecule is described by an asymmetric double-well potential and the environment is modeled as a bath of harmonic oscillators. We carefully analyze different time-scales appearing in the resulting master equation at both weak- and strong-coupling limits. The corresponding results are accompanied by a set of coupled differential equations characterizing optical activity of the molecules. We show that, at the weak-couplin…

利用光子纠缠探测单层细胞培养物的偏振响应

Probing polarization response of monolayer cell cultures with photon entanglement

提出利用纠缠光子对与偏振探测的高灵敏度量子光学方法，在低光子通量下区分两类单层细胞及宿主介质。