Transferring information through a mixed-five-spin chain channel

doi:10.1088/1674-1056/25/8/080307

中国物理B ›› 2016, Vol. 25 ›› Issue (8): 80307-080307.doi: 10.1088/1674-1056/25/8/080307

Transferring information through a mixed-five-spin chain channel

Hamid Arian Zad, Hossein Movahhedian

Department of Physics, Shahrood University of Technology, 36155-316 Shahrood, Iran

收稿日期:2016-03-07 修回日期:2016-04-07 出版日期:2016-08-05 发布日期:2016-08-05
通讯作者: Hamid Arian Zad E-mail:arianzad.hamid@yahoo.com

Transferring information through a mixed-five-spin chain channel

Hamid Arian Zad, Hossein Movahhedian

Department of Physics, Shahrood University of Technology, 36155-316 Shahrood, Iran

Received:2016-03-07 Revised:2016-04-07 Online:2016-08-05 Published:2016-08-05
Contact: Hamid Arian Zad E-mail:arianzad.hamid@yahoo.com

摘要/Abstract

摘要： We initially introduce one-dimensional mixed-five-spin chain with Ising-XY model which includes mixture of spins-1/2 and spins-1. Here, it is considered that nearest spins (1, 1/2) have Ising-type interaction and nearest spins (1/2, 1/2) have both XY-type and Dzyaloshinskii-Moriya (DM) interactions together. Nearest spins (1, 1) have XX Heisenberg interaction. This system is in the vicinity of an external homogeneous magnetic field B in thermal equilibrium state. We promote the quantum information transmitting protocol verified for a normal spin chain with simple model (refer to Rossini D, Giovannetti V and Fazio R 2007 Int. J. Quantum Infor. 5 439) (widely in reference: Giovannetti V and Fazio R 2005 Phys. Rev. A 71 032314) by means of considering the suggested mixed-five-spin chain as a quantum communication channel for transmitting both qubits and qutrits ideally. Hence, we investigate some useful quantities such as quantum capacity and quantum information transmission rate for the system. Finally, we conclude that, when the DM interaction between spins (1/2, 1/2) increases the system is a more ideal channel for transmitting information.

关键词: Dzyaloshinskii-Moriya interaction, XX Heisenberg interaction, communication channel, transmission rate

Abstract: We initially introduce one-dimensional mixed-five-spin chain with Ising-XY model which includes mixture of spins-1/2 and spins-1. Here, it is considered that nearest spins (1, 1/2) have Ising-type interaction and nearest spins (1/2, 1/2) have both XY-type and Dzyaloshinskii-Moriya (DM) interactions together. Nearest spins (1, 1) have XX Heisenberg interaction. This system is in the vicinity of an external homogeneous magnetic field B in thermal equilibrium state. We promote the quantum information transmitting protocol verified for a normal spin chain with simple model (refer to Rossini D, Giovannetti V and Fazio R 2007 Int. J. Quantum Infor. 5 439) (widely in reference: Giovannetti V and Fazio R 2005 Phys. Rev. A 71 032314) by means of considering the suggested mixed-five-spin chain as a quantum communication channel for transmitting both qubits and qutrits ideally. Hence, we investigate some useful quantities such as quantum capacity and quantum information transmission rate for the system. Finally, we conclude that, when the DM interaction between spins (1/2, 1/2) increases the system is a more ideal channel for transmitting information.

Key words: Dzyaloshinskii-Moriya interaction, XX Heisenberg interaction, communication channel, transmission rate

中图分类号: (Quantum information)

03.67.-a

03.67.Hk (Quantum communication) 05.60.Gg (Quantum transport)

Hamid Arian Zad, Hossein Movahhedian. Transferring information through a mixed-five-spin chain channel[J]. 中国物理B, 2016, 25(8): 80307-080307.

Hamid Arian Zad, Hossein Movahhedian. Transferring information through a mixed-five-spin chain channel[J]. Chin. Phys. B, 2016, 25(8): 80307-080307.

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Transferring information through a mixed-five-spin chain channel

Transferring information through a mixed-five-spin chain channel

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