The first measurement of coherence in an excited-state optical transition in a rare-earth doped crystal yields a maximum coherence time of 4.75 μs at telecom wavelength.
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Proposes a cavity-based single-atom quantum repeater protocol claiming secret key rates of a few to hundreds of Hz over 1000 km via 10-atom multiplexing.
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Spectroscopy and Coherence of an Excited-State Transition in Tm$^{3+}$:YAlO$_3$ at Telecommunication Wavelength
The first measurement of coherence in an excited-state optical transition in a rare-earth doped crystal yields a maximum coherence time of 4.75 μs at telecom wavelength.
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Efficient Quantum Repeater with Single Atoms in Cavities
Proposes a cavity-based single-atom quantum repeater protocol claiming secret key rates of a few to hundreds of Hz over 1000 km via 10-atom multiplexing.