Searched for: author%3A%22Davidson%2C+J.H.%22
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Davidson, J.H. (author)
Quantum memories will prove to be an invaluable tool for distributing entangled quantum states over distance. Many novel materials for this purpose are being investigated and key among them are rare earth ion doped crystals. These materials possess a great number of potential combinations of host crystal and ion species for further study, some...
doctoral thesis 2022
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Davidson, J.H. (author), Woodburn, Philip J.T. (author), Marsh, Aaron D. (author), Olson, Kyle J. (author), Olivera, Adam (author), Das, A. (author), Falamarzi Askarani, M. (author), Tittel, W. (author), Cone, Rufus L. (author), Thiel, Charles W. (author)
We characterize the magnetic properties for thulium ion energy levels in the (Tm:YGG) lattice with the goal to improve decoherence and reduce linewidth broadening caused by local host spins and crystal imperfections. More precisely, we measure hyperfine tensors for the lowest level of and excited states using a combination of spectral hole...
journal article 2021
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Falamarzi Askarani, M. (author), Das, A. (author), Davidson, J.H. (author), Castro do Amaral, G. (author), Slater, J.A. (author), Marzban, S. (author), Cone, Rufus L. (author), Oblak, Daniel (author), Tittel, W. (author)
We argue that long optical storage times are required to establish entanglement at high rates over large distances using memory-based quantum repeaters. Triggered by this conclusion, we investigate the 795.325 nm3 H6↔H34 transition of Tm:Y3Ga5O12 (Tm:YGG). Most importantly, we find that the optical coherence time can reach 1.1 ms, and, using...
journal article 2021
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Davidson, J.H. (author), Lefebvre, Pascal (author), Zhang, Jun (author), Oblak, Daniel (author), Tittel, W. (author)
We design and implement an atomic frequency comb quantum memory for 793-nm wavelength photons using a monolithic cavity based on a thulium- (Tm-) doped Y3Al5O12 crystal. Approximate impedance matching results in the absorption of 90% of input photons and a memory efficiency of (27.5±2.7)% over a 500-MHz bandwidth. The cavity enhancement leads...
journal article 2020
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Puigibert, Marcel Li Grimau (author), Falamarzi Askarani, M. (author), Davidson, J.H. (author), Verma, Varun B. (author), Shaw, Matthew D. (author), Nam, Sae Woo (author), Lutz, Thomas (author), Castro do Amaral, G. (author), Oblak, Daniel (author), Tittel, W. (author)
Entangling quantum systems with different characteristics through the exchange of photons is a prerequisite for building future quantum networks. Proving the presence of entanglement between quantum memories for light working at different wavelengths furthers this goal. Here, we report on a series of experiments with a thulium-doped crystal,...
journal article 2020
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