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Remote State Preparation in Noisy Conditions

Author: LiangHuaQiu
Tutor: LiuJinMing
School: East China Normal University
Course: Optics
Keywords: Tangle Remote state preparation Noise channel Trace distance Fidelity
CLC: O413.1
Type: Master's thesis
Year: 2008
Downloads: 28
Quote: 0
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Abstract


Quantum information science is a product of the combination of modern quantum theory and information science , and it is primarily the study of quantum communication and quantum computing . In the field of quantum communication , two typical scenarios as the transmission of quantum information - quantum teleportation and remote state preparation has been attracting much attention . This paper studies the noise the case of remote state preparation process. The paper first reviews some basic knowledge about quantum entanglement and quantum state some basic operations . Then introduced Ideally, quantum teleportation and remote state preparation of the basic ideas and methods , including EPR states as the amount of subchannels to transmit single-bit quantum states using EPR states to remote preparation of single-bit quantum state using GHZ state remote preparation of entangled state programs. This article focuses on the equivalent subchannel influenced by the ambient noise remote state preparation process , the ambient noise can be expressed in the form of Lindblad operator . Studied by solving the master equation of Lindblad form of the quantum channel evolution over time , with the trace distance and fidelity to describe the the output state pending the preparation of the initial state of the closeness . Under the influence of noise EPR states and the two-body part of the entangled state as the quantum channel , respectively remote preparation of single-bit state quantum processes used to track the distance to measure the output state of the closeness of the initial state noise case . Also studied GHZ state as the amount of subchannels distant preparation of single quantum state and the two-body entangled state with fidelity to describe the noise remote state preparation and calculate the average fidelity in the case of different types of noise . The study shows that the z - direction of the impact of the noise on the remote state preparation weakest, and the x, y, z directions of the noise at the same time the presence of the influence of the remote state preparation maximum . This article discussed the quantum noise remote state preparation process for the study of information transmission in the actual quantum system is helpful .

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CLC: > Mathematical sciences and chemical > Physics > Theoretical Physics > Quantum theory > Quantum mechanics ( wave mechanics,matrix mechanics )
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