In chapter 3, a one-dimensional isotropic biquadratic Heisenberg spin chain equation is considered.

第三章研究了一个一维的四阶铁磁链方程。

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First, a model of a pair of coupled particles interacting with a Heisenberg spin chain is presented.

首先，本文提出了一个耦合粒子对与海森堡自旋链相互作用的模型。

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We study the dynamics evolution of a two-qubit Heisenberg XXX spin chain under a time-dependent rotating magnetic field.

我们研究了含时旋转磁场中海森堡XXX模型下的双量子比特的动力学演化情况。

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He convinced the company to spin off coffee and doughnut chain Tim Hortons and got some of his handpicked candidates on Wendy's board.

FORBES: Magazine Article

He convinced the company to spin off coffee and doughnut chain Tim Hortons (nyse: THI - news - people ) and got some of his handpicked candidates on Wendy's board.

FORBES: Food Billionaire To Buy Wendy's

After some serious management upheaval, the Gap began to turn a corner this year, finally churning out fashion hits like brightly colored jeans at its flagship Gap chain, and Mad Men-inspired clothing at upscale spin-off Banana Republic.

FORBES: The Retailers That Have the Most To Gain -- Or Lose -- This Holiday Season