def gfGSWLesser(kPoint, wRel, tAv, eta, damping):
tRel = FT.tVecFromWVec(wRel)
tRelNeg = tRel[:len(tRel) // 2 + 1]
GFT = gfGSExpDamping(kPoint, tRelNeg, tAv, eta, damping)
GFZero = np.zeros((len(tRel) // 2 - 1, len(tAv)), dtype='complex')
GFT = np.concatenate((GFT, GFZero), axis=0)
_, GFW = FT.FTOneOfTwoTimesPoint(tRel, GFT)
return GFW
def gfCohWGreater(kVec, wRel, tAv, eta, damping, N):
tRel = FT.tVecFromWVec(wRel)
tRelPos = tRel[len(tRel) // 2:]
GFT = gfCohExpDampingGreater(kVec, tRelPos, tAv, eta, damping, N)
GFZero = np.zeros((len(kVec), len(tRel) // 2, len(tAv)), dtype='complex')
GFT = np.concatenate((GFZero, GFT), axis=1)
_, GFW = FT.FTOneOfTwoTimes(tRel, GFT)
return GFW
def gfGSWGreater(kPoint, wRel, tAv, eta, damping):
tRel = FT.tVecFromWVec(wRel)
tRelPos = tRel[len(tRel) // 2:]
GFT = gfGSExpDamping(kPoint, tRelPos, tAv, eta, damping)
GFZero = np.zeros((len(tRel) // 2, len(tAv)), dtype='complex')
GFT = np.concatenate((GFZero, GFT), axis=0)
_, GFW = FT.FTOneOfTwoTimesPoint(tRel, GFT)
return GFW
def gLesserW(kPoint, wRelVec, tAvArr, eta, damping, cohN):
tVec = FT.tVecFromWVec(wRelVec)
tVecNeg = tVec[:len(tVec) // 2 + 1]
GFT = gLesserDamp(kPoint, tVecNeg, tAvArr, eta, damping, cohN)
GFZero = np.zeros((len(tVec) // 2 - 1, len(tAvArr)), dtype='complex')
GFT = np.concatenate((GFT, GFZero), axis=0)
wVecCheck, GFW = FT.FTOneOfTwoTimesPoint(tVec, GFT)
assert ((np.abs(wRelVec - wVecCheck) < 1e-10).all)
return GFW
def gfCohWLesser(kVec, wRel, tAv, eta, damping, N):
tRel = FT.tVecFromWVec(wRel)
tRelNeg = tRel[:len(tRel) // 2 + 1]
GFT = gfCohExpDampingLesser(kVec, tRelNeg, tAv, eta, damping, N)
GFZero = np.zeros((len(kVec), len(tRel) // 2 - 1, len(tAv)),
dtype='complex')
GFT = np.concatenate((GFT, GFZero), axis=1)
_, GFW = FT.FTOneOfTwoTimes(tRel, GFT)
return GFW
def numGreenVecWLesser(kVec, wVec, eta, damping):
tVec = FT.tVecFromWVec(wVec)
tVecPos = tVec[len(tVec) // 2:]
GFT = gfNumVecTLesser(kVec, tVecPos, eta, damping)
GFZero = np.zeros((len(kVec), len(tVec) // 2), dtype='complex')
GFT = np.concatenate((GFZero, GFT), axis=1)
wVecCheck, GFW = FT.FT(tVec, GFT)
return GFW
def anaGreenVecW(kVec, wVec, eta, damping):
tVec = FT.tVecFromWVec(wVec)
tVecPos = tVec[len(tVec) // 2:]
GFT = anaGreenVecT(kVec, tVecPos, eta, damping)
GFZero = np.zeros((len(kVec), len(tVec) // 2), dtype='complex')
GFT = np.concatenate((GFZero, GFT), axis=1)
wVecCheck, GFW = FT.FT(tVec, GFT)
assert ((np.abs(wVec - wVecCheck) < 1e-10).all)
return GFW
def gfCohWTurned(kPoint, wRel, tAv, eta, damping, N):
if (np.abs(kPoint) > np.pi / 2.):
return np.zeros((len(wRel), len(tAv)))
tRel = FT.tVecFromWVec(wRel)
tRelPos = tRel[len(tRel) // 2:]
GFT = gfCohExpDampingTurned(kPoint, tRelPos, tAv, eta, damping, N)
GFZero = np.zeros((len(tRel) // 2, len(tAv)), dtype='complex')
GFT = np.concatenate((GFZero, GFT), axis=0)
_, GFW = FT.FTOneOfTwoTimesPoint(tRel, GFT)
if (np.abs(np.abs(kPoint) - np.pi / 2.) < 1e-12):
return 0. * GFW
else:
return GFW
def expectationSinSinW(wVec, eta, damping):
tVec = FT.tVecFromWVec(wVec)
tVecPos = tVec[len(tVec) // 2:]
expSinSinPos = expectationSinSin(tVecPos, eta)
expSinSinPosTurned = expectationSinSinTurned(tVecPos, eta)
expSinSinPos = -expSinSinPos + expSinSinPosTurned
Zeros = np.zeros((len(tVec) // 2), dtype='complex')
#expSinSin = np.concatenate((expSinSinPos, Zeros), axis=0)
expSinSin = np.concatenate((Zeros, expSinSinPos), axis=0)
dampingArr = np.exp(-damping * np.abs(tVec))
expSinSinDamped = expSinSin * dampingArr
wVecCheck, expSinSinW = FT.FT(tVec, expSinSinDamped)
#gsT = - 2. / np.pi * prms.chainLength
#fac = np.sqrt(1 - 2. * eta * eta / (prms.w0) * gsT)
#return eta**2 / fac * (1j / (wVec - fac * prms.w0 + 1j * damping) - 1j / (wVec + fac * prms.w0 + 1j * damping))
return expSinSinW * np.sqrt(2. * np.pi)
