To bring quantum technologies to market takes both technical expertise and commercial acumen. We combine skills with industry partners to maximise the chances of success and impact. This page highlights projects and partnerships initiated or led by CQT Principal Investigators and research staff.
Supported by Singapore’s DSO National Laboratories, CQT Principal Investigators began in 2020 applied research projects: “Research Collaboration On Optical Ground Station For Satellite Quantum Communications” led by Alexander Ling, and “Assessment On Advanced Inertial Sensing Techniques For Navigation And Characterization Of An Atomic Gravimeter Platform” led by Rainer Dumke.
SGInnovate is a Singapore government-backed organisation supporting the local development of deep tech. They have a partnership with CQT to support quantum as one of their focus areas, involving talks, training and support for startups.
CQT Colloquium by Alexander Lvovsky, University of Oxford
Title: Superresolving linear optical imaging in the far field Date/Time: 17-Feb, 04:00PM Venue: Online via Zoom
Abstract: The resolution of optical imaging devices is ultimately limited by the diffraction of light. To circumvent this limit, modern superresolution microscopy techniques employ active interaction with the object by exploiting its optical nonlinearities, nonclassical properties of the illumination beam, or near field probing. These techniques are therefore not applicable whenever such interaction is not possible, for example, in astronomy or noninvasive biological imaging. Far field, linear optical superresolution techniques based on passive analysis of light coming from the object would cover these gaps.
We present the first proof-of-principle demonstration of such a technique for 2D imaging. It works by accessing information about spatial correlations of the image optical field and, hence, about the object itself via measuring projections onto Hermite-Gaussian transverse spatial modes. With a basis of 21 spatial modes in both transverse dimensions, we perform two-dimensional imaging with twofold resolution enhancement beyond the diffraction limit.
Additionally, we determine the ultimate quantum limit in estimating the precision of reconstructing a distribution of a set of coherent and incoherent light sources in terms of the quantum Fisher information. We show that Hermite-Gaussian microscopy and several related techniques are capable of approaching this limit and significantly surpass direct imaging. This theory is an important step towards taking QISR from toy examples to real imaging scenarios.