Antimatter And Annihilation. Remember Photons? What are photons?
Time Correlated Photons using Optical Rephasing Techniques with Rare Earth Ion Doped Solids
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Transcript of Time Correlated Photons using Optical Rephasing Techniques with Rare Earth Ion Doped Solids
Time Correlated Photons using Optical Rephasing Techniques with Rare Earth Ion
Doped Solids
Patrick Ledingham and Jevon LongdellJack Dodd Centre for Quantum Technology, Physics Dept., The University of Otago, New Zealand
QIP-REIDS 2011
Two Pulse Photon Echo
High EfficiencyTemporally Multimode
Broadband
Quantum Memory for Light
Two Pulse Photon Echo
Collective Spontaneous Emission
2PE ≠ QM
1. Rephased Amplified Spontaneous Emission
2. Experimental Results
Outline
Rephased Amplified Spontaneous Emission
RASE violates Cauchy –Swartz Inequality
Rephased Amplified Spontaneous Emission
RASE = broadband time entangled photon streams
InterferometerExperimental Set Up
Sample Balanced Heterodyne Detection
ECDL
Hybrid Locking to a
Spectral Hole
Two Pulse Photon Echo
Optical Depth = 3.1
Efficiency @ Zero Delay= 190%
T2 = ~ 20μs
Amplified Spontaneous Emission
2500 shots at 10Hzπ/2, π, 3π/2, 2πtπ = 1.6μs
Amplified Spontaneous Emission
Bandwidth of ASE= 170kHz
Amplified Spontaneous Emission
ASE is phase independent
Rephased Amplified Spontaneous Emission
55μs
100μs
20μs
Cross-Correlation
6.44μs
60μs
10μs20μs
Cross-Correlation
3.5μs
Is it Quantum?
Inseparability Criterion
Not Quantum, why?
•Imperfect π pulses
•Detection Mode
Conclusion
• Rephased Amplified Spontaneous Emission is a protocol to create broadband time separated entangled photons
• Measured a correlation between the ASE and RASE fields – not quantum, yet
60μs
10μs20μs
Rephased Amplified Spontaneous Emission
Detection Mode