23.07.19 1
Henning Weier
qutools GmbH
Our company
2006: quED
2009: quTAU
2016: quTAG 2018: Quanten- koffer Entanglement
Demonstrator
Time Tagger 81 ps Resolution
Time Tagger 1 ps Resolution
Science Kit for Quantum Optics
• Spin-off from LMU Munich (2005)
• Privately owned
• Employees: 10 (hiring!)
• Munich, Germany
Interferometric Tape Measure
2019: quDIS
l Quantenphysik wird als „kontra-intuitiv“ bezeichnet
l Phänomenologischer, spielerischer Ansatz
l Hands-on
Quantenkoffer: Quantenphysik be-greifen
Quantenkoffer
l SPDC source as source of heralded single photons
l One arm used as trigger
l Coincidences only evaluate the interesting events
quED: (Entangled) Photon Pair Source
quED http://www.qutools.com/quED/
Is it a Wave? Is it a Particle?
quED-MI
Is it a Wave? Is it a Particle?
quED-MI
Waves explain:
• Refraction
• Diffraction
• Interference
Is it a Wave? Is it a Particle?
quED-MI
http://www.qutools.com/quED/
Waves explain:
• Refraction
• Diffraction
• Interference
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
quED-MI: Is it a Wave?
quED-MI
Waves explain:
• Refraction
• Diffraction
• Interference
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
quED-MI: Is it a Wave?
quED-MI
Waves explain:
• Refraction
• Diffraction
• Interference
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
quED-MI: Is it a Wave?
quED-MI
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
Waves explain:
• Refraction
• Diffraction
• Interference
quED-MI: Is it a Wave?
quED-MI
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
Waves explain:
• Refraction
• Diffraction
• Interference ✔
quED-MI: Is it a Wave?
quED-MI
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
Waves explain:
• Refraction
• Diffraction
• Interference ✔
quED-HBT: Is it a Particle?
quED-HBT
Waves explain:
• Refraction
• Diffraction
• Interference
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
quED-HBT: Is it a Particle?
quED-HBT
Waves explain:
• Refraction
• Diffraction
• Interference
Indivisible (single) particles à no coincidences (Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
quED-HBT: Is it a Particle?
quED-HBT
Indivisible (heralded single) particles à no 3-fold coincidences
quED-HBT: Is it a Particle?
quED-HBT
quED-HBT: Is it a Particle?
quED-HBT
Waves explain:
• Refraction
• Diffraction
• Interference
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units
Hanbury Brown Twiss Experiment
• gH(2)(τ=0) = 0.11
• < 0.5: “Heralded single photon source”
quED-HBT: Is it a Particle?
quED-HBT
Waves explain:
• Refraction
• Diffraction
• Interference
(Elementary) Particles explain:
• No inner structure, especially
• No fragmentation into smaller energy units ✔
Hanbury Brown Twiss Experiment
• gH(2)(τ=0) = 0.11
• < 0.5: “Heralded single photon source”
quED-MI + quED-HBT: Is it something else?
quED-MI + quED-HBT
Combine both setups:
quED-MI + quED-HBT: Is it something else?
quED-MI + quED-HBT
Combine both setups:
quED-MI + quED-HBT: Is it something else?
quED-MI + quED-HBT
Combine both setups:
• Interference
• Particle-like behaviour
quED-MI + quED-HBT: Is it something else?
quED-MI + quED-HBT
Combine both setups:
• Interference ✔
• Particle-like behaviour ✔
The quED and Its Add-Ons
quED
Entanglement:
Bell‘s Inequality
Wave Character of Photons
Particle Character of Photons: HBT
2-Photon Interference:
Hong-Ou-Mandel
http://www.qutools.com/quED/
quED quED-MI quED-HBT quED-HOM
Quantum Key Distribution/
Cryptography quED-QKD
Quantenmobil
Quantenmobil
http://www.quantenkoffer.de
23.07.19 25
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