Steven Sagona-Stophel, Dounan Du, Sonali Gera, and Eden ......Steven Sagona-Stophel, Dounan Du,...
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Steven Sagona-Stophel, Dounan Du, Sonali Gera, and Eden Figueroa Department of Physics and Astronomy, Stony Brook University
Transcript of Steven Sagona-Stophel, Dounan Du, Sonali Gera, and Eden ......Steven Sagona-Stophel, Dounan Du,...
Steven Sagona-Stophel, Dounan Du, Sonali Gera, and Eden Figueroa
Department of Physics and Astronomy, Stony Brook University
Creates an effective χ2 nonlinearity [1] from χ3 :
QuantumMemory Photon-Photon Gate
FWM from χ3 !
? Low noise at room temperature?
High fidelity at single photon level??[1] Phys. Rev. Lett. 116, 023601 (2016)
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“EIT-like” output FWM output
FWM from χ3 !
Low noise at room temperature!
High fidelity at single photon level!
χ3- Mediated processing: Λ
Quadrature statistics
=-2.7 rad
(probe & signal on)
(signal only On)
(probe only On)
Phase-shifted output
FWM output
“EIT-like” output
DL output CSF: >90%
FWM CSF: >95%
Quantum States
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Accepted
15 October 2020
Accepted to PRL, October 15, 2020
χ
Λ
New gate scheme requires two effective χ(2) processes: 2-1 photon-up-conversion & 1-2 down-conversion
(Numeric Simulation)Abs(χ(3)) for Diamond
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Telecom frequency conversion:
2-1 Up-conversion Investigated:
Photon-gates process with true single photons:
We need photon sources compatible with the small (3MHz) bandwidth.Built a cavity enhanced single photon source at Rb transitions:
Estimated pair rate: 5kHz for 5mW of Pump
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