Stokes vector and its relationship to Discrete Wigner Functions of multiqubit states
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- 作者：K. Srinivasan ; sriniphysics@gmail.com" class="auth_mail" title="E-mail the corresponding author ; G. Raghavan
- 关键词：Discrete Wigner function ; Quantum entanglement ; Stokes vector ; Spinflip operation
- 刊名：Physics Letters A
- 出版年：2016
- 出版时间：29 July 2016
- 年：2016
- 卷：380
- 期：33
- 页码：2489-2493
- 全文大小：265 K
文摘
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Relationship between Stokes vector (SV) and discrete Wigner function (DWF) for arbitrary multiqubit states is presented.
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It is shown that SV and DWF are related to one another through Hadamard matrices.
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We show that the Hadamard matrices depend on the choice of the quantum net.
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Relationship between SV of the spin flipped state and the DWF is derived.
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Expression to compute n-concurrence of the pure n-qubit systems purely in terms of DWF is given.