# Quantum key distribution using a triggered quantum dot source emitting near 1.3μm

@article{Intallura2007QuantumKD, title={Quantum key distribution using a triggered quantum dot source emitting near 1.3$\mu$m}, author={P. M. Intallura and Martin Ward and O. Z. Karimov and Z. L. Yuan and Patrick See and Andrew J. Shields and Paola Atkinson and D. A. Ritchie Toshiba Research Europe Limited and Cambridge and UK. and Cavendish Laboratory and University of Cambridge}, journal={Applied Physics Letters}, year={2007}, volume={91}, pages={161103} }

We report the distribution of a cryptographic key, secure from photon number splitting attacks, over 35km of optical fiber using single photons from an InAs quantum dot emitting ∼1.3μm in a pillar microcavity. Using below GaAs-bandgap optical excitation, we demonstrate suppression of multiphoton emission to 10% of the Poissonian level without detector dark count subtraction. The source is incorporated into a phase encoded interferometric scheme implementing the BB84 protocol for key…

## 69 Citations

Quantum communication using single photons from a semiconductor quantum dot emitting at a telecommunication wavelength

- Physics
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Quantum key distribution with single photons from a telecommunication-wavelength quantum dot source is performed over a standard optical fibre link. The source was operated at a temperature of 70 K…

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We have developed a high-performance single-photon source (SPS) operating at 1.5 µm wavelength. The source is an InAs/InP quantum dot with a horn-shaped nanostructure. A resonant excitation to the…

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We present the first demonstration of telecom fiber-based quantum key distribution using single photons from a quantum dot in a pillar microcavity. The source offers both telecommunication wavelength…

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We report on single photon emission from a self-assembled InAs/InGaAlAs/InP quantum dash emitting at 1.55 μm at the elevated temperatures. The photon auto-correlation histograms of the emission from…

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- 2011

We present a detailed analysis of a gigahertz clock rate environmentally robust phase-encoded quantum key distribution (QKD) system utilizing several different single-photon detectors, including the…

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- EngineeringSPIE/OSA/IEEE Asia Communications and Photonics
- 2011

This paper describes progress in gigahertz-clocked quantum key distribution systems. It details current advances in both point-to-point and network applications. We will discuss possibilities for…

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- Physics, MedicineOptics express
- 2013

This work demonstrates the first proof of principle differential phase shift (DPS) quantum key distribution (QKD) using narrow-band heralded single photons with amplitude-phase modulations with a quantum bit error rate as low as 3.06% and suggests that narrow- band single photons maybe a promising source for the DPS- QKD protocol.

## References

SHOWING 1-10 OF 20 REFERENCES

Single photon quantum cryptography.

- Physics, MedicinePhysical review letters
- 2002

The full implementation of a quantum cryptography protocol using a stream of single photon pulses generated by a stable and efficient source operating at room temperature reaches a domain where single photons have a measurable advantage over an equivalent system based on attenuated light pulses.

On-demand single-photon source for 1.3μm telecom fiber

- Physics
- 2005

We demonstrate an on-demand single-photon source that is compatible with standard telecom optical fiber. Through careful control of the critical strains of InAs∕GaAs self-assembled quantum dots, we…

Quantum key distribution over 122 km of standard telecom fiber

- Physics
- 2004

We report a demonstration of quantum key distribution over a standard telecom fiber exceeding 100 km in length. Through careful optimization of the interferometer and single photon detector, we…

Secure communication with a heralded single-photon source

- Physics
- 2005

Secure long distance communication over optical fibres requires robust data encryption. While the encryption itself can be conducted using classical algorithms, there is no unconditionally secure…

Continuous operation of a one-way quantum key distribution system over installed telecom fibre.

- Physics, MedicineOptics express
- 2005

A robust, compact and automated quantum key distribution system, based upon a one-way Mach-Zender interferometer, which is actively compensated for temporal drifts in the photon phase and polarization is demonstrated, suggesting that actively compensated QKD systems are suitable for practical applications.

Beating the photon-number-splitting attack in practical quantum cryptography.

- Physics, MedicinePhysical review letters
- 2005

We propose an efficient method to verify the upper bound of the fraction of counts caused by multiphoton pulses in practical quantum key distribution using weak coherent light, given whatever type of…

Quantum key distribution at 1550 nm using a pulse heralded single photon source.

- Physics, MedicineOptics express
- 2007

Quantum key distribution with pulsed heralded single photon source was performed over 40 km of fiber and QBER was measured to be 4.23% suggesting security against unconditional attack.

Secure communication: Quantum cryptography with a photon turnstile

- Computer Science, MedicineNature
- 2002

An experimental demonstration of quantum cryptography that uses a photon turnstile device, which is more reliable for delivering photons one at a time, and allows completely secure communication in circumstances under which this would be impossible with an attenuated laser.

Limitations on practical quantum cryptography

- Computer Science, MedicinePhysical review letters
- 2000

It is shown that parametric down-conversion offers enhanced performance compared to its weak coherent pulse counterpart and existing experimental schemes (based on weak pulses) currently do not offer unconditional security for the reported distances and signal strength.

Unconditionally secure quantum key distribution over 50 km of standard telecom fibre

- Mathematics, Physics
- 2004

A weak pulse quantum key distribution system is presented, which is secure against all individual attacks, including photon number splitting. By carefully controlling the weak pulse intensity the…