Squeezed light for ultra-sensitive measurements and quantum communication

According to quantum theory, the energy exchange between physical systems is quantized. As a direct consequence, the minimum resolvable signal in metrology relying on optical readout is fundamentally limited by ‘quantum noise’. Specifically engineered quantum states of light, called ‘squeezed states’, can be used to improve the sensitivity of optical measurements beyond the quantum noise limit. Moreover, squeezed states are important resource for the production of correlated twin beams called ‘entangled states’, which lie at the core of most quantum communication protocols. In this talk, I will introduce the community to my research on the development of quantum technology for the production of nonclassical light. I will show how quantum light can improve sensitivity of optical measurements and enable new science based on signals that would otherwise be obscured by quantum noise.



Jiri Janousek earned his PhD degree in 2008 at the Technical University of Denmark, where he worked on the idea of using nonclassical quantum states of light for ultra-sensitive measurements. He continued this research as a postgraduate fellow at the Department of Quantum Science at ANU with focus to investigate quantum states of light in spatial domain for quantum imaging, metrology and communication. He joined the Quantum Control group at CECS in 2015 under the supervision of Prof E Huntington. His role is to pursue the development of quantum technology allowing generation of nonclassical light with high degree of quantum correlations.


Date & time

2–3pm 29 Nov 2019


Room:Engineering Theatre


Dr Jiri Janousek


02 6125 7896

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