Integrated Sources of Quantum States and On-chip Quantum Interferometers

  • OU, Jeff (Principal Investigator / Project Coordinator)

Project: Research

Project Details

Description

Quantum states of light such as squeezed states and entangled states have found many applications in quantum technologies such as quantum metrology, quantum sensing, quantum information processing, quantum computing, and quantum communication. These quantum-oriented technologies promise superior performance to their classical counterparts. In the meantime, interferometric technique is widely used in precision measurement and optical remote sensing, and is the fundamental building block for quantum computing. Construction using the hardware with quantum entanglement leads to a novel type of quantum interferometer with advantages over traditional classical interferometers. Protocols for these have all been demonstrated in laboratory table-top settings. However, for practical real-world applications especially in quantum sensing and quantum computing, it is highly desirable to have the aforementioned sources and devices constructed in integrated platforms for portability and scalability. Integrated systems also have the advantages of strong quantum nonlinear interaction accompanied with low loss, which are all crucial for the delicate quantum effects.In this research program, we will design, construct, and test a number of integrated quantum devices for generating squeezed states and entangled states on-chip. The devices will be constructed on two platforms of periodically poled lithium niobate (PPLN) wave guide and silica glass micro-ring resonator, respectively. As the first application of these devices, we will construct a novel quantum nonlinear interferometer with these quantum devices and demonstrate quantum advantages in phase sensing. The developed devices can also serve as a part of measurement elements to achieve on-chip quantum measurement, which avoids the detrimental effect of losses in chip coupling process. This will pave the way for miniaturization of quantum sensors and large-scale quantum computing.The program implements the mature quantum optical technology in an integrated platform, making it a step closer for large scale real-world applications. The robustness of the integrated systems is ideal for implementing quantum interference processes, which are key elements in optical quantum computing. Potential industrial transfer of the quantum technology in sensing applications will be straightforward with the success of the program. The design and testing of the on-chip quantum devices require a deep understanding of quantum physics, which provides a perfect platform for training next generation quantum physicists and preparing them for the on-going quantum revolution.
Project number9043580
Grant typeGRF
StatusActive
Effective start/end date1/01/24 → …

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