# 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

### Transmission Experiment of Quantum Keys over 50 km Using High-Performance Quantum-Dot Single-Photon Source at 1.5 µm Wavelength

- PhysicsApplied Physics Express
- 2010

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…

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

- Physics
- 2009

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…

### Quantum key distribution using a semiconductor quantum dot source emitting at a telecommunication wavelength

- PhysicsSPIE OPTO
- 2008

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…

### 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…

### Daylight entanglement-based quantum key distribution with a quantum dot source

- Physics
- 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…

### Tools for the performance optimization of single-photon quantum key distribution

- Physicsnpj Quantum Information
- 2020

This work shows that temporal filtering of single-photon pulses enables a performance optimization of QKD systems implemented with realistic quantum light sources, both in experiment and simulations.

### Single-photon emission of InAs/InP quantum dashes at 1.55 μm and temperatures up to 80 K

- Physics
- 2016

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…

### Deterministic Quantum Devices for Optical Quantum Communication

- Physics
- 2020

Photonic quantum technologies are based on the exchange of information via single photons. The information is typically encoded in the polarization of the photons and security is ensured…

### Analysis of detector performance in a gigahertz clock rate quantum key distribution system

- Physics
- 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…

### Differential-phase-shift quantum key distribution using heralded narrow-band single photons.

- PhysicsOptics 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.

- PhysicsPhysical 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.

### 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, Computer Science
- 2005

It is shown that single-photon based QKD outperforms the industry-standard weak coherent pulse approach and the recent experimental results on building a heralded single- photon source based on spontaneous parametric down-conversion of CW light are presented.

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

- PhysicsOptics 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, Computer SciencePhysical 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.

- PhysicsOptics 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, PhysicsNature
- 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.

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

- Computer Science, Physics
- 2004

A weak pulse quantum key distribution system is presented, which is secure against all individual attacks, including photon number splitting, and the maximum secure bit rate as a function of the fibre length is demonstrated.

### Single photon interference in 10 km long optical fibre interferometer

- Physics
- 1993

Single-photon interference fringes with greater than 90% visibility were measured using a 10 km long optical fibre interferometer. The experiment employed a pulsed semiconductor laser source…

### Decoy state quantum key distribution.

- Physics, Computer SciencePhysical review letters
- 2005

The method is to use decoy states to detect eavesdropping attacks and has the best of both worlds--enjoying unconditional security guaranteed by the fundamental laws of physics and yet dramatically surpassing some of the best experimental performances reported in the literature.