Title:
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Solid State Spin-Wave Quantum Memory for Time-Bin Qubits
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Author:
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Gündoğan, Mustafa; Ledingham, Patrick M.; Kutluer, Kutlu; Mazzera, Margherita; Riedmatten, Hugues de
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Other authors:
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Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques |
Abstract:
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We demonstrate the first solid-state spin-wave optical quantum memory with on-demand read-out.
Using the full atomic frequency comb scheme in a Pr3þ∶Y2SiO5 crystal, we store weak coherent pulses at
the single-photon level with a signal-to-noise ratio > 10. Narrow-band spectral filtering based on spectral
hole burning in a second Pr3þ∶Y2SiO5 crystal is used to filter out the excess noise created by control pulses
to reach an unconditional noise level of ð2.0 0.3Þ × 10−3 photons per pulse. We also report spin-wave
storage of photonic time-bin qubits with conditional fidelities higher than achievable by a measure and
prepare strategy, demonstrating that the spin-wave memory operates in the quantum regime. This makes
our device the first demonstration of a quantum memory for time-bin qubits, with on-demand read-out
of the stored quantum information. These results represent an important step for the use of solid-state
quantum memories in scalable quantum networks. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Quantum optics -Quantum Memories -Òptica quàntica |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
Published by:
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APS
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