According to the study of carbon nanotubes promising quantum single photon source

According to reports: June 20 (Reporter Liu Xia) According to recent news from the Los Alamos National Laboratory official website in the United States, the laboratory researchers are working with French and German partners to explore the use of carbon nanotubes as a single-use information processing tool. Photonic emitter potential. New research published in the latest issue of the journal Nature Science will promote the development of optically-based quantum communications and quantum computing.

One of the authors of the paper, Stephen Doron, a scientist at the Laboratory's Center for Integrative Nanotechnology (CINT), said: "We are particularly interested in the advancement of nanotubes by integrating them into the optical cavity to manipulate and optimize the luminescent properties. Carbon nanotubes can be well integrated into optical structures, and the integration of carbon nanotubes into electroluminescent devices can better control the light emission timing. We are currently working hard to study the use of carbon nanotubes as a single wavelength for telecommunications at room temperature. Photon transmitter path, and its photophysical properties."

In traditional information networks, information flows in the form of "bits", which are processed and modulated by electronic circuits and transmitted through optical pulses. Quantum information networks use "qubits" to process and store quantum information. Unlike classical networks, the information transmission between different nodes of a quantum information network uses single photons instead of intense light pulses.

The paper points out that a good single-photon source (light source that emits at most one photon within a specified time) is very important for quantum information processing and quantum communication, while traditional light sources, such as sunlight, electric lights, etc., emit “flocks”. "Photon."

In view of this, the laboratory researchers, together with partners in France and Germany, explored the potential of using carbon nanotubes as single photon emitters for quantum information processing. At present, the laboratory has developed chemically modified nanotube structures that deliberately create defects, localize excitons, and control their release.

Doron said that next they intend to integrate nanotubes into optical resonators to enhance light source brightness and produce indistinguishable photons. He said: "To create single photons that are indistinguishable from each other, we rely on the functionalization of these carbon nanotubes to make them suitable for device integration, and to minimize the ability of defect sites to interact with the environment."