RAISE-TAQS: Quantum Advantage of Broadband Entangled Photon Pairs in Spectroscopy and Metrology

该奖项在跨学科科学与工程研究先进（RAISE）在量子系统（TAQS）计划的转型进展支持迈克尔·雷默教授，安德鲁·马库斯和布赖恩·史密斯在俄勒冈州大学的合作工作，以证明实验改进的性能在遥感对象和电子耦合分子光谱使用光的量子力学状态。非线性光学光谱学和计量学的进步依赖于内在的量子力学效应，对化学，物理学和工程界具有广泛的科学兴趣。如此开发的方法和研究将创造新的机会，可用于不断扩大的量子信息科学跨学科领域。所支持的研究将有助于在国际会议和讲习班上传播研究成果，所开发的工具将随时提供给科学界。这三个PI将在拟议工作的各个方面进行合作，并将共同为从事项目的博士生提供建议。参与的学生将因此享受独特而广泛的研究培训，涵盖量子光学，超快分子光谱学和生物物理学。俄勒冈州光学，分子和量子科学中心的一个跨学科团队，跨越化学，物理和工程，将进行实验，以证明爱因斯坦-波多尔斯基-罗森（EPR）类纠缠的光子在时间-频域可以在光谱学和计量学中提供显著的量子优势。时频纠缠光子对（EPP）在时间上是紧密相关的，而在频率上是反相关的，使得光子对的能量之和是明确定义的。当采用光子符合事件时，这种光的量子态提供了规避经典傅立叶时间带宽限制的能力，无论是在检测中，如在标准量子光学中，还是在分子复合物的双光子激发中，如在非线性光谱学中。该研究将在计量学和非线性光谱学中的四个相关光学方案的背景下研究潜在的量子优势：1）量子照明（感测物体的存在或不存在）; 2）互补参数的多参数估计（例如，估计反射物体的距离和速度）; 3）双光子干涉非线性光谱学;以及4）纠缠光子对2D荧光光谱学。这四个方案的共同点是使用宽带（多光谱模式），自发参量下转换（SPDC）产生的时频EPP，再加上利用量子干涉的干涉仪配置。该奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

This award in the Research Advanced by Interdisciplinary Science and Engineering (RAISE) on Transformational Advances in Quantum Systems (TAQS) program supports collaborative work by Professors Michael Raymer, Andrew Marcus and Brian Smith at the University of Oregon to demonstrate experimentally improved performance in the sensing of remote objects and the spectroscopy of electronically coupled molecules using quantum mechanical states of light. Advancements in nonlinear optical spectroscopy and metrology that rely on intrinsically quantum mechanical effects are of broad scientific interest to the chemistry, physics and engineering communities. The methods and research so developed will create new opportunities that may be utilized in the expanding interdisciplinary field of quantum information science. The supported research will facilitate the dissemination of results at international meetings and workshops, and the tools developed will be made readily available to the scientific community. The three PIs will collaborate on all aspects of the proposed work, and will co-advise the PhD students working on the projects. The students involved will thus enjoy a unique and broad exposure to research training that spans quantum optics, ultrafast molecular spectroscopy, and biophysics.An interdisciplinary team spanning chemistry, physics, and engineering in the Oregon Center for Optical, Molecular, and Quantum Science, will carry out experiments to demonstrate that Einstein-Podolsky-Rosen (EPR)-like entanglement of photons in the time-frequency domain can provide a significant quantum advantage in spectroscopy and metrology. Time-frequency entangled photon pairs (EPP) are tightly correlated in time while being anti-correlated in frequency, such that the sum of the energies of the photon pair is sharply defined. Such quantum states of light offer the ability to circumvent classical Fourier time-bandwidth limits when employing photon coincidence events, either in detection, as in standard quantum optics, or in two-photon excitation of molecular complexes, as in nonlinear spectroscopy. The research will investigate potential quantum advantages in the context of four related optical schemes in metrology and nonlinear spectroscopy: 1) Quantum illumination (sensing of an object's presence or absence); 2) Multi-parameter estimation of complementary parameters (e.g., estimating the distance and velocity of a reflecting object); 3) Two-photon interferometric nonlinear spectroscopy; and 4) Entangled photon-pair 2D fluorescence spectroscopy. The commonality that unifies the four schemes is the use of broad-band (multi-spectral-mode), time-frequency EPP produced by spontaneous parametric down-conversion (SPDC), coupled with interferometer configurations that exploit quantum interference.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.