Quantum control using genetic algorithms in quantum communication: superdense coding

International Conference on 'Quantum Control, Exact or Perturbative, Linear or Nonlinear' to celebrate 50 years of the scientific career of Professor Bogdan Mielnik

Domínguez-Serna, Francisco^1 ; Rojas, Fernando^2

Posgrado en Física de Materiales, Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California, Ensenada

22890, Mexico^1

Centro de Nanociencias y Nanotecnología, Departamento de Física Teórica, Universidad Nacional Autónoma de México, Baja California, Ensenada

22860, Mexico^2

关键词: Classical information;    Control process;    Entangled state;    Spin orbit interactions;    Superdense coding;    Time dependent control parameters;    Transmission channels;    Two degrees of freedom;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/624/1/012009/pdf
DOI  :  10.1088/1742-6596/624/1/012009

来源: IOP

【 摘 要 】

We present a physical example model of how Quantum Control with genetic algorithms is applied to implement the quantum superdense code protocol. We studied a model consisting of two quantum dots with an electron with spin, including spin-orbit interaction. The electron and the spin get hybridized with the site acquiring two degrees of freedom, spin and charge. The system has tunneling and site energies as time dependent control parameters that are optimized by means of genetic algorithms to prepare a hybrid Bell-like state used as a transmission channel. This state is transformed to obtain any state of the four Bell basis as required by superdende protocol to transmit two bits of classical information. The control process protocol is equivalent to implement one of the quantum gates X, Zin the charge subsystem. Fidelities larger than 99.5 % are achieved for the hybrid entangled state preparation and the superdense operations.