Optomechanical Memory for Light
Publikation: Bog/antologi/afhandling/rapport › Ph.d.-afhandling › Forskning
Mechanical resonators constitute an essential element in emerging quantum technologies. Since such resonators can couple to a range of different degrees of freedom, they are particularly promising in interfacing disparate quantum systems. The recent developments in the design of mechanical resonators with ever decreasing dissipation and quantum-coherent optical control of their displacement has cemented them as a principal element in the toolbox of hybrid quantum systems.
In this thesis, we report the demonstration of a long-lived and efficient memory for light based on an optomechanical cavity, operating at a wavelength in the telecom C-band. We study the storage and retrieval of coherent fields at room temperature, and demonstrate long life-times and reasonable efficiencies, T1 ≈ 23 ms and η ≈ 40% respectively, converting optical information to mechanical excitations by the phenomenon of optomechanically induced transparency.
We extrapolate the demonstrated room-temperature performance to cryogenic conditions, with cautious estimates indicating the feasibility of ground state cooling and the associated quantum-coherent storage of light with less than one added noise quantum. Lastly, we show that modest improvements to our platform can enable observing the effects of injecting single photons, as a step towards quantum repeater applications.
In this thesis, we report the demonstration of a long-lived and efficient memory for light based on an optomechanical cavity, operating at a wavelength in the telecom C-band. We study the storage and retrieval of coherent fields at room temperature, and demonstrate long life-times and reasonable efficiencies, T1 ≈ 23 ms and η ≈ 40% respectively, converting optical information to mechanical excitations by the phenomenon of optomechanically induced transparency.
We extrapolate the demonstrated room-temperature performance to cryogenic conditions, with cautious estimates indicating the feasibility of ground state cooling and the associated quantum-coherent storage of light with less than one added noise quantum. Lastly, we show that modest improvements to our platform can enable observing the effects of injecting single photons, as a step towards quantum repeater applications.
Originalsprog | Engelsk |
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Forlag | Niels Bohr Institute, Faculty of Science, University of Copenhagen |
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Antal sider | 163 |
Status | Udgivet - 2023 |
ID: 380301159