Quantum cryptography with highly entangled photons from semiconductor quantum dots
@article{Schimpf2020QuantumCW, title={Quantum cryptography with highly entangled photons from semiconductor quantum dots}, author={Christian Schimpf and Marcus Reindl and Daniel Huber and Barbara Lehner and Saimon Filipe Covre da Silva and Santanu Manna and Michal Vyvlecka and Philip Walther and Armando Rastelli}, journal={Science Advances}, year={2020}, volume={7} }
Fiber-based quantum cryptography between two buildings is demonstrated using entangled photons from a GaAs quantum dot. Semiconductor quantum dots are capable of emitting polarization entangled photon pairs with ultralow multipair emission probability even at maximum brightness. Using a quantum dot source with a fidelity as high as 0.987(8), we implement here quantum key distribution with an average quantum bit error rate as low as 1.9% over a time span of 13 hours. For a proof of principle…
41 Citations
Entanglement-based quantum key distribution with a blinking-free quantum dot operated at a temperature up to 20 K
- PhysicsAdvanced Photonics
- 2021
Entanglement-based quantum key distribution promises enhanced robustness against eavesdropping and compatibility with future quantum networks. Among other sources, semiconductor quantum dots can…
Enhancing quantum cryptography with quantum dot single-photon sources
- Physics, Computer Sciencenpj Quantum Information
- 2022
This work identifies the optimal optical pumping scheme for the main quantum-cryptographic primitives, and elaborate on the advantage of using phonon-assisted and two-photon excitation rather than resonant excitation for quantum key distribution and other primitives.
Atomically-thin single-photon sources for quantum communication
- Physicsnpj 2D Materials and Applications
- 2023
To date, quantum communication widely relies on attenuated lasers for secret key generation. In future quantum networks, fundamental limitations resulting from their probabilistic photon distribution…
Quantum interference between independent solid-state single-photon sources separated by 300 km fiber
- Physics
- 2021
In the quest to realize a scalable quantum network, semiconductor quantum dots (QDs) offer distinct advantages including high single-photon efficiency and indistinguishability, high repetition rate…
Free‐Space Quantum Key Distribution with Single Photons from Defects in Hexagonal Boron Nitride
- PhysicsAdvanced Quantum Technologies
- 2022
Efficient single photon generation is an important requirement for several practical applications in quantum technologies, including quantum cryptography. A proof‐of‐concept demonstration of…
Quantum Communication Using Semiconductor Quantum Dots
- PhysicsAdvanced Quantum Technologies
- 2022
Worldwide, enormous efforts are directed toward the development of the so‐called quantum internet. Turning this long‐sought‐after dream into reality is a great challenge that will require…
Two-Photon Excitation Sets Fundamental Limit to Entangled Photon Pair Generation from Quantum Emitters
- Physics
- 2022
Entangled photon pairs are key to many novel applications in quantum technologies. Semiconductor quantum dots can be used as sources of on-demand, highly entangled photons. The fidelity to a fixed…
Two-Photon Excitation Sets Limit to Entangled Photon Pair Generation from Quantum Emitters.
- PhysicsPhysical review letters
- 2022
Entangled photon pairs are key to many novel applications in quantum technologies. Semiconductor quantum dots can be used as sources of on-demand, highly entangled photons. The fidelity to a fixed…
Daylight entanglement-based quantum key distribution with a quantum dot source
- PhysicsQuantum Science and Technology
- 2022
Entanglement-based quantum key distribution can enable secure communication in trusted node-free networks and over long distances. Although implementations exist both in fiber and in free space, the…
Multipair-free source of entangled photons in the solid state
- PhysicsPhysical Review B
- 2022
Unwanted multiphoton emission commonly reduces the degree of entanglement of photons generated by non-classical light sources and, in turn, hampers their exploitation in quantum information science…
References
SHOWING 1-10 OF 62 REFERENCES
Highly-efficient extraction of entangled photons from quantum dots using a broadband optical antenna
- PhysicsNature Communications
- 2018
High extraction efficiency through a broadband dielectric photonic antenna is demonstrated and a highly-efficient entangled-photon source is demonstrated by collecting strongly entangled photons at a pair efficiency of 0.002 per pulse.
Quantum key distribution with an entangled light emitting diode
- Physics, Computer Science
- 2015
Here, a quantum cryptography system based on an electrically driven entangled-light-emitting diode is realized and formation of an error-free quantum key is shown, which exceeds the threshold for quantum entanglement.
Long-term transmission of entangled photons from a single quantum dot over deployed fiber
- PhysicsScientific Reports
- 2019
Stable transmission of polarization-encoded entanglement with a high fidelity of 91% is achieved, facilitating the operation of sub-Poissonian quantum light sources over existing fiber networks.
Bright nanoscale source of deterministic entangled photon pairs violating Bell’s inequality
- PhysicsScientific Reports
- 2017
This work shows a bright photonic nanostructure generating polarization-entangled photon pairs that strongly violates Bell's inequality, and highlights their potential application in secure data communication utilizing measurement-device-independent quantum key distribution and quantum repeater protocols.
Ultrabright source of entangled photon pairs
- PhysicsNature
- 2010
The results open the way towards the fabrication of solid state triggered sources of entangled photon pairs, with an overall efficiency of 80%, by coupling an optical cavity in the form of a ‘photonic molecule’ to a single quantum dot.
Entanglement Swapping with Photons Generated on Demand by a Quantum Dot.
- PhysicsPhysical review letters
- 2019
A proof-of-concept demonstration of all-photonic entanglement swapping with pairs of polarization-entangled photons generated on demand by a GaAs quantum dot without spectral and temporal filtering is shown and a theoretical model that quantitatively reproduces the experimental data and provides insights on the critical figures of merit for the performance of the swapping operation is developed.
A solid-state source of strongly entangled photon pairs with high brightness and indistinguishability
- PhysicsNature Nanotechnology
- 2019
An entangled photon pair source source is presented with high brightness and indistinguishability by deterministically embedding GaAs quantum dots in broadband photonic nanostructures that enable Purcell-enhanced emission.
All-photonic quantum teleportation using on-demand solid-state quantum emitters
- PhysicsScience Advances
- 2018
On-demand solid-state quantum emitters are one of the most promising candidates to realize deterministic quantum teleportation in practical quantum networks and a theoretical framework is developed that matches the experimental observations and defines the degree of entanglement and indistinguishability needed to overcome the classical limit independently of the input state.
Polarization-entangled photons from an InGaAs-based quantum dot emitting in the telecom C-band
- Physics
- 2017
We demonstrate the emission of polarization-entangled photons from a single semiconductor quantum dot in the telecom C-band (1530 nm–1565 nm). To reach this telecommunication window, the…
Low-noise GaAs quantum dots for quantum photonics
- PhysicsNature communications
- 2020
This work embeds GaAs quantum dots into an n-i-p-diode specially designed for low-temperature operation and demonstrates ultra-low noise behaviour: charge control via Coulomb blockade, close-to lifetime-limited linewidths, and no blinking.