quantum-limited measurements of signals from a … · quantum-limited measurements of signals from...

Quantum Information ProcessingLeuchs Division

Dominique ElserQcrypt Washington, D.C.

14 September 2016

Quantum-limited Measurements of Signals from a Satellite in Geostationary Earth Orbit


MPL Free Space Quantum Comm.

2000Lab

2007100 m

20091.6km

201639 Mm

201526 km


Erlangen, Germany

C. Peuntinger, B. Heim, et al., PRL 113, 060502 (2014).B. Heim, C. Peuntinger, et al., NJP 16, 113018 (2014).

B92 BPSKBB84 QPSK

Squeezed States HomodyneStokes

Detection


Channel Transmission Histogram

V. C. Usenko et al., NJP 14, 093048 (2012).B. Heim, C. Peuntinger et al., NJP 16, 113018 (2014).


European Data Relay System (EDRS) / GlobeNet

Laser Communication Terminal (LCT) on Alphasat, EDRS and Copernicus

LCT very close to MPL systemCollaboration with Tesat/DLR

BPSK homodyne


Teide Observatory Tenerife, Spain

TDP1 LCT

AlphasatGEO@25°E

Teide Observatory Tenerife, Spain

TDP1 LCT

Alphasat

GEO25°E


Space-Ground-Link

K. Günthner, I. Khan, et al., arXiv:1608.03511 [quant-ph] (2016).


B92 BPSK Protocol in Phase Space

Bit 0 Bit 1

I, X

Q, P

| ⟩𝛼𝛼| ⟩˗𝛼𝛼


Alphasat Signal Measurements


Bounds on atmospheric influence

upper bound for atmospheric influence: 0.8 ± 2.4above the quantum uncertainty of the vacuum state



Status Global High-Speed Q-Com

• Feasibility analysis (2012)• Terrestrial quantum link in MPL testbed (2013)• Lab tests with sat-receiver (2015)• Field tests with ground station (2015)• Terrestrial quantum link with ground station (2015)• Quantum measurements of Alphasat signals (2016)• Optimized quantum receiver (2016+)• Quantum Add-on to Tesat/DLR LCT (2016+)


Gazing for | ⟩𝛼𝛼 -Sat

Kevin GünthnerImran Khan

Dominique ElserBirgit Stiller

Ömer BayraktarChristian R. Müller

Karen SauckeDaniel Tröndle

Frank HeineStefan Seel

Peter GreulichHerwig ZechBjörn GütlichInes Richter

Sabine Philipp-MayChristoph Marquardt

Gerd LeuchsK. Günthner, I. Khan, et al., arXiv:1608.03511 [quant-ph] (2016).

quantum-limited measurements of signals from a … · quantum-limited measurements of signals from...

Documents