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Applied Mechanics and Materials

Qubit Noise within Micro PANDA Ring Resonator in QKD Process

Chatchawal Sripakdee

Published Mar 1, 2018• 0 citations
Publisher

Abstract

The aim of this work is about establishing and analyzing the Hamiltonian for entangled photon generation in a micro PANDA ring resonator for a quantum key generation unit in quantum cryptography processing. The reduced density matrix for two level states of qubits is also analyzed by using dynamics Heisenberg equation of motion. The master equation in the thermal effect shows fluctuation of the corresponding c-operators in phase space. The optimum simulation result for probability of qubit states survive for the existence of a surrounding heat bath is also showed and discussed.

DOI
10.4028/www.scientific.net/amm.879.178

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The aim of this work is about establishing and analyzing the Hamiltonian for entangled photon generation in a micro PANDA ring resonator for a quantum key generation unit in quantum cryptography processing. The reduced density matrix for two level states of qubits is also analyzed by using dynamics Heisenberg equation of motion. The master equation in the thermal effect shows fluctuation of the corresponding c-operators in phase space. The optimum simulation result for probability of qubit states survive for the existence of a surrounding heat bath is also showed and discussed.
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We firstly present and analyze a feasible schematic optical sensor made from PANDA ring resonator which generates WGM of tunneling photons to be used in the atomic trapping process in quantum computer processing to teleport quantum states. A simulation done by launching electromagnetics of Gaussian soliton pulses into an optical tweezers device is given to obtain time dependent evolution of polarization qubit states. It shows that under very low temperature, an optimum photon resonant frequency of such qubit has sufficient stability lifetime to be used in quantum signal states transferring purposes.
A quadruple micro PANDA ring resonator quantum gate device is designed and investigated schematically. The simulation results of the optimum propagation of soliton polarized states in the device depend heavily on initial phase angles of the input ports. The quality factor under varying of nonlinear coupling constant of micro strip line waveguides are also analyzed. The simulation results show more robust under the wide range of the outer tunneling frequency in whispering gallery modes of the device. This means that an optical trapping efficiency is attained and get more stable qubit processing.
The aim of this study is to analyze the quantum correlation of entangled photons for four-wavemixing process within Kerr nonlinear susceptibility χ(3) of an optical fiber ring resonator. The main system Hamiltonian composes of two types of coupling photon modes, including pumping and parametric-down conversion. Wigner representation is applied to the Heisenberg equation of motion derived from the system Hamiltonian in order to obtain the corresponding stochastic equations of motion in a c-number. Quantum trajectories obtained from the stochastic equation of motion of photon states are then derived. Finally, the entanglement inseparability criteria for a pair of entangled photonfrom a numerical approach is also satisfied.
We study the entanglement dynamics of multi-qubit systems coupled to a common dissipative environment, focusing on systems with one or two initially excited qubits. Using the Lindblad master equation, we derive the time evolution of the density matrix and analyze the entanglement between qubit pairs via the concurrence measure. The solution method involves applying the Lindblad super-operator to the initial density matrix, generating a subspace of non-duplicate states. We extend our analysis to nnn-qubit systems, including three-qubit and four-qubit configurations, and explore the effects of thermal noise on entanglement dynamics. Our results demonstrate how initial conditions, system size, and environmental interactions shape entanglement, providing valuable insights for quantum information processing applications.
This paper proposes optical CODEC (code/decode) or quantum cryptograph uses a quantum key distribution (QKD) for information security, from which the improvement of the secret information key rate is developed. The QKD is generated by using the bright soliton pulses within a PANDA ring resonator, which is formed by the add/drop filter. Initially, the bright soliton is generated by a fiber laser and input into the proposed system, where the input bright soliton is controlled by the optical switching, where the required pulse trains can be obtained. The QKD can be formed by using the correlated photon of each pulse by using the polarization device control. In addition, the purposed system is performed by a smaller size, in which the secure information with high capacity of channels can be obtained incorporating the qubits generated by the quantum processor, which can be served the large demand bandwidth with the secure communication applications.