double mean field

Double Mean Field

H 0 = q ϵ B z [ 2 R e S q ( f q + f q 1 2 ) + S q + f q f q + S q f q + f q + ]

= q ϵ B z [ 2 R e S q ( f q + f q 1 2 ) + i 2 I m S q f q + f q + i 2 I m S q f q f q ]

H h = 2 h ( f 0 + χ 0 + χ 0 + f 0 )

H v = 2 J z χ 0 + χ 0 ( 2 f 0 + f 0 1 )

H v M F = H v H a t r e e + H v F o c k

H v H a t r e e = 4 J z < χ 0 + χ 0 > f 0 f 0 + 4 J z ( < f 0 + f 0 > 1 2 ) χ 0 + χ 0

= 4 J z n χ f 0 f 0 + 4 J z ( n f 1 2 ) χ 0 + χ 0

H v F o c k = 4 J z < χ 0 + f 0 > f 0 + χ 4 J z < f 0 + χ 0 > χ 0 + f 0

= Δ f 0 + χ Δ χ 0 + f 0

H M F = H 0 + H h + H v M F

= H 0 + 4 J z n χ f 0 + f 0 + 4 J z ( n f 1 2 ) χ 0 + χ 0 + h e f f f 0 + χ + h e f f χ 0 + f 0

where : h e f f = 2 h Δ

for H 0 we have

H 0 = q ϵ 1 2 B z H q

H q = [ 2 R e S q + 2 J z ( 2 n χ 1 ) 2 i I m S q 4 J z h o p 2 h 4 J z p a i r 2 a 2 i I m S q 2 R e S q + 2 J z ( 2 n χ 1 ) 4 J z p a i r + 2 a 4 J z h o p + 2 h 4 J z h o p 2 h 4 J z p a i r + 2 a 2 ( 2 n f 1 ) J z 0 4 J z p a i r 2 a 4 J z h o p + 2 h 0 2 ( 2 n f 1 ) J z ]

left vector:
| ψ >= [ f q , f q + , χ q , χ q + ]

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转载自blog.csdn.net/qq_41584674/article/details/79918576