def action_hopping_second(x, y, **args):
ll = args.get("ll")
BASE_bin = args.get("BASE_bin")
t = args.get("t")
state_x = BASE_bin[x]
bosecon_x = ff.TO_bose_conf(state_x, ll)
state_y = BASE_bin[y]
bosecon_y = ff.TO_bose_conf(state_y, ll)
jump_cd = np.argmin(bosecon_x - bosecon_y)
jump_c = np.argmax(bosecon_x - bosecon_y)
rem = (jump_c + 1) % ll
if rem == jump_cd:
direction = 'right'
hop = np.conjugate(t)
elif jump_c == jump_cd:
direction = 'stand'
else:
direction = 'left'
hop = t
# print(bosecon_x,bosecon_y,direction)
result = np.sqrt((bosecon_x[jump_cd] + 1) * (bosecon_x[jump_c]))
return hop * result
def action_interactions(state, **args):
ll = args.get("ll")
U = args.get("U")
bosecon = ff.TO_bose_conf(state, ll)
int_val = 0.5 * U * np.dot(bosecon, bosecon - 1.)
return int_val
def action_potential(state, **args):
ll = args.get("ll")
bar = args.get("bar")
pot = np.zeros(ll, dtype=np.float)
pot[0] = bar
bosecon = ff.TO_bose_conf(state, ll)
bar_val = np.dot(pot, bosecon)
# print(pot)
# print(bosecon)
# print(bar_val)
return bar_val