content_image/297553.jpg content_image/297554.jpg content_image/297555.jpg
<img src='content_image/297553.jpg'>

The zero temperature potential is 

<img src='content_image/297554.jpg'>

To obtain the VEV of φ , we find the minimum of the zero temperature potential. The VEV is 

<img src='content_image/297555.jpg'>

