X - NASA Quantum Future Technologies Conference

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Free-‐Space 2-‐Way Optical Communications Records §� Space-‐to-‐Space 1 : ú� Record set by the infrared diode neodymium laser on board the MESSENGER spacecraft in May 2005 ú� 2-‐way communication was established across 24 million km §� Ground-‐to-‐Ground 2 : ú� 276km (but bandwidth about 4kHz) §� Ground-‐to-‐Ground (DV-‐QKD demo) 3,4 ú� 144 km between La Palma and Tenerife 1. Source: http://en.wikipedia.org/wiki/Free-‐space_optical_communication 2. Source: http://www.modulatedlight.org/optical_comms/optical_qso_173mile.html 3. Source: http://www.quantum.at/research/quantum-‐teleportation-‐communication-‐entanglement/entangled-‐photons-‐over-‐144-‐km.html 4. Source: http://www.quantum.at/research/quantum-‐teleportation-‐communication-‐entanglement/entangled-‐photons-‐over-‐144-‐km.html
CV-‐QKD is Preferred Option for Free-‐Space Communications §� CV-‐QKD has many advantages over DV-‐QKD for optical communications in free space ú� Robust to background light � Homodyne detectors rely on a local oscillator laser co-‐ propagating with signal laser. Only photons with same frequency and same spatial mode as the local oscillator are detected ú� Robust to timing jitter � Local oscillator provide automatic timing reference ú� Robust to spatial jitter � As local oscillator and signal laser co-‐propagate in same spatial mode they both jitter spatially identically ú� No need for a “guide” laser � Adaptive optics can correct wavefront distortions due to propagation through atmosphere without need for a separate guide laser ú� Easily miniaturized opto-‐electronics
Page 1 and 2: Colin P. Williams (JPL) NASA QUANTU
Page 3 and 4: Impact if Successful §� Guarante
Page 5 and 6: Recent NASA Incidents §� NASA ne
Page 7 and 8: Stated NASA Need … §� Need “
Page 9 and 10: What are “Amplitude” & “Phase
Page 11 and 12: DV-‐QKD vs CV-‐QKD §� Mo
Page 13 and 14: Current Team §� NASA (JPL & Ames
Page 15 and 16: Telcordia Experience: Quantum Netwo
Page 17 and 18: State-‐of-‐the-‐Art in
Page 19 and 20: Technical Challenges §� Extendin
Page 21 and 22: NASA APPLICATIONS OF QUANTUM COMPUT
Page 23 and 24: Alternative Models of Quantum Compu
Page 25 and 26: Progress in Quantum Hardware Trappe
Page 27 and 28: How Quantum Annealing via AQC Works
Page 29 and 30: State-‐of-‐the-‐Art Adi
Page 31 and 32: Applications N.B. the quantum proce
Page 33 and 34: Example: Image Registration §� G
Page 35 and 36: Example: Optimal Sensor Placement
Page 37 and 38: Risks & Payoffs §� Risks ú� N
Page 39 and 40: Thank you! Mauna Kea Haleakala, Mau
Page 41 and 42: Key Milestones in CV-‐QKD §�
Page 43: CV-‐QKD in Free-‐Space Comm
Page 47: US OIG Audit - the Results §� We

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