pyEPR.calcs.hamiltonian module

Hamiltonian and Matrix Operations. Hamiltonian operations heavily draw on qutip package. This package must be installed for them to work.

class pyEPR.calcs.hamiltonian.HamOps

Bases: object

static closest_state_to(s: qutip.qobj.Qobj, energyMHz, evecs)

Returns the energy of the closest state to s

static closest_state_to_idx(s: qutip.qobj.Qobj, evecs)

Returns the index

static fock_state_on(d: dict, fock_trunc: int, N_modes: int)

d={mode number: # of photons} In the bare eigen basis

static identify_Fock_levels(fock_trunc: int, evecs, N_modes=2, Fock_max=4)

Return quantum numbers in terms of the undiagonalized eigenbasis.

class pyEPR.calcs.hamiltonian.MatrixOps

Bases: object

static cos(op_cos_arg: qutip.qobj.Qobj)

Make cosine operator matrix from argument op_cos_arg

op_cos_arg (qutip.Qobj) : argument of the cosine

static cos_approx(x, cos_trunc=5)

Create a Taylor series matrix approximation of the cosine, up to some order.

static dot(ais, bis)

Dot product