Optical Quantum Information and Quantum Communication

Pieter Kok, Brendon W. Lovett

Rohit K. Ramakrishnan, Shafeek A. Samad, Kande Archana +3 more

Quantum communication or more specifically quantum information processing is considered as the future of information science and technology. In this paper we propose a scheme to implement quantum communication at the device level using integrated optics. We implement the quantum communication protocol BB84, in a waveguide based circuit using integrated optics. We also propose a high dimensional quantum key distribution method implementation using integrated optics. In the earlier one polarized photons are used as the carriers of quantum information, while in second one electromagnetic modes in the waveguide are used to carry quantum information. The high dimensional quantum communication method is used to increase the information content of protocol thus increasing on the data rates. This is done by encoding into a larger state space. We have used electromagnetic modes for encoding since the polarization method is not efficient to carry information in a larger state space.

Zhaoyuan Song

Light information storage technology has important significance in all-optical communications in future and quantum information field, and is bottleneck of optical signal processing nowadays. Physical mechanism of electromagnetically induced transparency effects and light information storage theory based on this mechanism are clarified. The field research development is summarized, and the applications in all-optical communications in future and quantum communications field prospected..

Apostol Vourdas

S. Ya. Kilin

Viroj Wiwanitkit

Massless particle photon has been serving as the information carrier in a large number of classical communication systems in the form of electromagnetic waves. With the advancements in quantum optics, due to the progress in the design and development of high-quality optical cavities and improvements in the connement of atoms, ions, and molecules using sophisticated optical traps and optical lattices, individual photons can now be generated, manipulated, and guided. These capabilities of controlling individual photons herald the emergence of quantum communication systems used in quantum optics [1-4]. Quantum communication is the art of communicating quantum states between spatially separated locations. A photon is generally used as the carrier for transferring quantum information (encoded into quantum states) from the transmit node to the receive node of the quantum communication system.