The researcher designed Pyramid LED quantum dots, or to promote the development of quantum computing

Quantum computing is widely regarded as innovative technology for the next generation of global computing. Google, Intel and IBM and other giants in the field at present has invested millions, which will promote faster, more efficient processing, to meet the future of computing, high-speed network, data encryption and other applications, such as national defense, security and sensing.

The day before, the Irish National Institute of Tindall (Tyndall National Institute) the researchers used lithography technology scalable and compatible with the design of a factory, Pyramid quantum dot shaped light-emitting diode (LED), is expected to generate entangled photon correlation function and state of quantum computing.

Dr. Pelucchi Emanuele is responsible for the project said that this study future will be used to study the quantum computing, quantum technology to accelerate applications.

Tindall Research Institute of quantum dots using nanotechnology to Pyramid like array electric to generate entangled photon. The use of nano characteristics of conical structure inherent, especially for the design of self assembling vertical quantum wires, quantum dots of current injection can be selectively. The results reported in this paper is an important step to realize quantum photonic integrated circuit design, lay the foundation for thousands or even more synchronous operation of quantum information processing tasks.

The researchers by etching back the original basement, Pyramid structure and make it back to top up, so as to create more internal embedded components increase several orders of magnitude of light capture. Then the design of the top and bottom contacts, to selectively single QD structure in Pyramid in the middle of the injection current, the key lies in the use of self calibration techniques, so that the assembly is easy to realize large-scale manufacturing.

Through the contact LED all the researchers to think about 1300 LED for a lot of analysis, but also control the LED plan in order to achieve better performance of selectivity, heterogeneity and compensation process.

Ideally, for quantum information processing, the researchers hope to use LED as a source of entangled photons completely indistinguishable. Photon extraction efficiency is also very low, is about 1%, therefore, the researchers expect through the use of different techniques (such as the built-in electric field stress and material improvement).

The Tindall researchers have developed the relevant program led quantum dots to produce entangled photons, the theory can be used for information encoding in quantum computation. Pelucchi explained that this is not the only solution LED to generate entangled photons, but as described in the "natural" photonics in the article, the methods and materials has important influence on the future of quantum technology.

The traditional digital calculation depends on the binary switch, and quantum computation in quantum state events -- such as the atomic entangled photon or multiple state -- the realization of information encoding. In theory, it can promote the computer processing faster and more powerful, but the current technology is difficult to support large-scale development.

Innovation is a power scalable quantum dot array design, the use of readily available materials and traditional semiconductor manufacturing technology. This method can directly obtain entangled photon source location. The key of this method is that quantum dot position control and large-scale manufacturing technology, their development will promote the wider use of quantum computing technology support.

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