Executive Summary
The RAISE: TAQS project has embarked on an ambitious journey to revolutionize the field of optical quantum information science through the development of a deterministic two-qubit photonic controlled-phase (controlled-Z) gate. This innovative approach leverages the strengths of photons as flying quantum bits (qubits), which are crucial for the advancement of quantum communication, computation, and precision measurement. The project successfully addressed the challenge of realizing efficient two-qubit gates for photonic qubits, a longstanding obstacle due to the absence of highly efficient optical Kerr nonlinearities at the single-photon level.

Intellectual Merit
The core innovation of the RAISE: TAQS project lies in its exploitation of strong photon-photon correlation and single-photon-level optical nonlinearity enabled by photonic bound states. This is complemented by the novel use of non-reciprocal single-photon propagation in chiral quantum nano-photonic systems. The project's intellectual contributions extend to the realms of strongly correlated photon transport in quantum nonlinear optics, chiral quantum nano-photonics, and the integration of cutting-edge nano-fabrication and single-photon detection techniques.
The successful development and demonstration of the two-photon controlled-phase gate mark a significant milestone in deterministic photonic quantum logic gates. This breakthrough paves the way for further research into few-photon nonlinear quantum optics and non-reciprocal quantum photonic devices. Applications stemming from this work include all-optical switching, single-photon transistors, and diodes, as well as the on-chip generation of large fluxes of entangled quantum photonic states. Such advancements herald a new era of quantum photonic light sources and the exploration of exotic correlated photonic states, promising invaluable insights into quantum photonic phase transitions and nonlinear quantum optical physics.

Broader Impacts
The RAISE: TAQS project's broader impacts are multifaceted, with profound implications for modern society and the field of quantum information technology. By advancing solid-state-based quantum optics, the project contributes significantly to a domain that is vital for the future of quantum information science. Beyond the scientific community, the project has engaged in comprehensive education and outreach activities. These efforts include integrating research findings into academic curricula, providing research opportunities for students across all educational levels, and organizing outreach activities aimed at K-12 students and the general public, such as summer camps, workshops, and ethics training.
A key focus has been on promoting STEM education, particularly among underrepresented minorities who traditionally have less access to STEM resources. By involving both faculty and graduate students in these initiatives, the project has fostered a culture of inclusion and encouragement for the next generation of scientists and engineers.

Conclusion
The RAISE: TAQS project stands as a testament to the power of innovative quantum research in transforming our understanding and control of the quantum world. Through its intellectual achievements and broader societal impacts, the project not only advances the frontiers of quantum information science but also inspires a diverse and inclusive future generation of researchers. As we look ahead, the insights and technologies developed through this project are set to influence a wide array of fields, from quantum computing and communication to precision measurement and beyond, heralding a new age of quantum-enabled technologies.

Last Modified: 03/11/2024
Modified by: Jung-Tsung Shen