Quantum information with light and atoms Quantum physics has been a primary scientific basis of technology over the past century. The invention of the transistor and laser, which are based on the laws of quantum physics, led to the development of compact radio and television devices, integrated circuits, computers, the Internet, and mobile communications – that is, defined our society as we know it today. These developments can be collectively identified as the first quantum revolution.
Now we are at the threshold of the second quantum revolution, marked by our recently acquired ability to construct complex quantum systems while maintaining control over states of their individual components, such as atoms, ions, or photons. This paves the road for a generation of technology with qualitatively new capabilities, such as measurement instruments of extraordinary sensitivity and resolution, exponentially faster computers, unconditionally secure communication, and materials with superior properties. The impact of these developments on the society is expected to rival, or even surpass, that of the first quantum revolution.
Technological application of quantum physics is my primary research interest. More specifically, my research concentrates on one particularly important quantum system: light, and its elementary particle, the photon. My vision is to develop light into a functional principal physical medium for quantum information processing.
Light is an appealing quantum system for a number of reasons. First, it has a unique ability to carry quantum information over long distances. No matter what shape future quantum devices will take, they will have to communicate with each other by optical means. Additionally, photons are remarkably resilient to decoherence because their energy greatly exceeds the room temperature, thereby minimizing the interaction with the environment.
However, the reluctance of light to interact with other objects also makes it a challenge to handle its quantum states in a controllable fashion. These states are difficult to prepare, manipulate, measure, store and bring into controllable interaction with one another or with other quantum systems. Resolving these challenges is paramount for the realization of the second quantum revolution and is the primary aim of my research agenda.
Super-resolving linear optical microscopy in the far field Since the invention of the optical microscope, there has been a quest for enhancing its resolution beyond the diffraction limit established by Rayleigh. A number of solutions have been realized; however, all of them so far relied either on near-field or nonlinear-optical probing, which makes them expensive and not universally applicable. Finding a microscopy technique that is both linear-optical and operational in the far-field regime would mark a revolution in all fields of science and technology that involve optical imaging, including astronomy, biology and medicine.
Within the past couple of years, an important development occurred in this domain. A solution has been put forward for overcoming the Rayleigh limit by extracting individual Hermite-Gaussian components from the electromagnetic field collected by the objective lens and measuring the intensity of these components. Proof-of-principle tests have been implemented by several experimental groups, including ours. Our research agenda includes paving the path from these basic tests to a technology that would enable us to build practical microscopes and telescopes with the resolution far beyond Rayleigh’s limit.
This supervisor is currently accepting inquires.
* Good knowledge of optics and quantum mechanics
* Interest to experimental work
* Experience with electronics is welcome
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