Positions at University of Innsbruck (UIBK)
The position below has been filled.
Objectives:
1) Superradiance enhanced state readout
Within the iqClock and MoSaiQC projects we revealed a novel excitation threshold to cross into a cavity superradiant phase appearing only for transverse atomic pumping. This can be the basis of an improved cavity superradiance enhanced Ramsey scheme. A proof of principle has been shown in a recent experiment by UCPH. Task 1: The DC will broaden the scope of the readout scheme by adapting it to waveguides and ring-cavities and delocalized ensembles. Task 2: Moreover, they will further generalize the technique towards multiple atomic transitions and light modes/polarizations. Task 3: The DC will work in close collaboration with UCPH to identify relevant experimental difficulties and optimize the readout scheme to enhance the number of cycles per sample preparation via minimized heating and atom recycling.
2) Continuous cavity enhanced spectroscopy
Task 4: Tailored to the experimental setups of UCPH and UvA we will investigate potential continuous cavity enhanced spectroscopy schemes in different regimes: with saturated atoms, as demonstrated in a pulsed version by UCPH; with low excitation, resulting in an antiresonance transmission signal. A particular focus will be on novel, efficient and practical measurement schemes, which will be developed by the DC. They will conduct realistic simulations of the large open quantum systems. Task 5: To this end, the DC will add features and further develop our open-source toolbox QuantumCumulants.jl, which was created and extensively used within the iqClock and MoSaiQC projects to simulate large open quantum systems. We will specifically target multimode fiber geometries as cavity alternatives.
3) Cavity induced spin squeezing
Task 6: The researcher will investigate cavity induced spin squeezing protocols based on non-demolition measurements, unitary evolutions or combined methods. The main focus thereby is to develop robust protocols, suitable for transportable clocks, and to optimize realistic protocols for the experiments at CNRS and UCPH. Task 7: Related to Task 5, the research will extend our framework QuantumCumulants.jl, in order to describe such systems with measurement back-action in a higher-order mean-field approach. To perform full quantum simulations, they will use and potentially also further develop our other open-source software QuantumOptics.jl.
1) Superradiance enhanced state readout
Within the iqClock and MoSaiQC projects we revealed a novel excitation threshold to cross into a cavity superradiant phase appearing only for transverse atomic pumping. This can be the basis of an improved cavity superradiance enhanced Ramsey scheme. A proof of principle has been shown in a recent experiment by UCPH. Task 1: The DC will broaden the scope of the readout scheme by adapting it to waveguides and ring-cavities and delocalized ensembles. Task 2: Moreover, they will further generalize the technique towards multiple atomic transitions and light modes/polarizations. Task 3: The DC will work in close collaboration with UCPH to identify relevant experimental difficulties and optimize the readout scheme to enhance the number of cycles per sample preparation via minimized heating and atom recycling.
2) Continuous cavity enhanced spectroscopy
Task 4: Tailored to the experimental setups of UCPH and UvA we will investigate potential continuous cavity enhanced spectroscopy schemes in different regimes: with saturated atoms, as demonstrated in a pulsed version by UCPH; with low excitation, resulting in an antiresonance transmission signal. A particular focus will be on novel, efficient and practical measurement schemes, which will be developed by the DC. They will conduct realistic simulations of the large open quantum systems. Task 5: To this end, the DC will add features and further develop our open-source toolbox QuantumCumulants.jl, which was created and extensively used within the iqClock and MoSaiQC projects to simulate large open quantum systems. We will specifically target multimode fiber geometries as cavity alternatives.
3) Cavity induced spin squeezing
Task 6: The researcher will investigate cavity induced spin squeezing protocols based on non-demolition measurements, unitary evolutions or combined methods. The main focus thereby is to develop robust protocols, suitable for transportable clocks, and to optimize realistic protocols for the experiments at CNRS and UCPH. Task 7: Related to Task 5, the research will extend our framework QuantumCumulants.jl, in order to describe such systems with measurement back-action in a higher-order mean-field approach. To perform full quantum simulations, they will use and potentially also further develop our other open-source software QuantumOptics.jl.
