qudit_sim.HamiltonianBuilder

class qudit_sim.HamiltonianBuilder(num_levels=2, qudits=None, params=None, default_frame='dressed')

Hamiltonian with static transverse couplings and external drive terms.

Parameters

• num_levels (int) – Number of energy levels to consider.

• qudits (Union[int, Sequence[int], None]) – If passing params to initialize the Hamiltonian, list of qudit numbers to include.

• params (Optional[Dict[str, Any]]) – Hamiltonian parameters given by IBMQ backend.configuration().hamiltonian['vars'], optionally augmented with 'crosstalk', which should be a dict of form {(j, k): z} specifying the crosstalk factor z (complex corresponding to \(\alpha_{jk} e^{i\rho_{jk}}\)) of drive on qudit \(j\) seen by qudit \(k\). \(j\) and \(k\) are qudit ids given in qudits.

• default_frame (str) – Default global frame to use. set_global_frame(default_frame, keep_phase=True) is executed each time add_qudit or add_coupling is called.

Methods

add_coupling(q1, q2, value)	Add a coupling term between two qudits.
add_crosstalk(source, target, factor)	Add a crosstalk term from the source channel to the target qudit.
add_drive(qudit_id[, frequency, amplitude, ...])	Add a drive term.
add_qudit(qubit_frequency, anharmonicity, ...)	Add a qudit to the system.
build([rwa, compile_hint, tlist, args])	Return the list of Hamiltonian terms passable to qutip.sesolve.
build_hdiag()	Build the diagonal term of the Hamiltonian.
build_hdrive([rwa, tlist, args])	Build the drive Hamiltonian.
build_hint([compile_hint, tlist])	Build the interaction Hamiltonian.
change_frame(tlist, obj, from_frame[, ...])	Apply the change-of-frame unitaries to states, unitaries, hamiltonians, and observables.
clear_drive()	Remove all drives.
copy([clear_drive])
coupling(q1, q2)	Coupling constant between the two qudits.
crosstalk(source, target)	Crosstalk factor from source to target.
dressed_frequencies([qudit_id])	Return the dressed-qudit frequencies.
drive([qudit_id])	Drive terms for the qudit.
eigenvalues()	Compute the energy eigenvalues of the static Hamiltonian (free and coupling).
frame([qudit_id])	Frame of the qudit.
frame_change_operator(from_frame[, to_frame])	Compute the change-of-frame operator.
free_frequencies([qudit_id])	Return the free-qudit frequencies.
identity_op()	rtype Qobj
make_scan(scan_type, values, **kwargs)	Build a list of copies of self varied over a single attribute.
make_tlist(points_per_cycle[, num_cycles, ...])	Build a list of time points using the maximum frequency in the Hamiltonian.
noiz_frequencies([qudit_id, comp_dim])	Return the no-IZ frequencies.
qudit_id(idx)	Qudit ID for the given index.
qudit_ids()	List of qudit IDs.
qudit_index(qudit_id)	Qudit index.
qudit_params(qudit_id)	Qudit parameters.
set_frame(qudit_id[, frequency, phase])	Set the frame for the qudit.
set_global_frame(frame_spec[, keep_phase])	Set frames for all qudits globally.

Attributes

num_levels	Number of considered energy levels.
num_qudits	Number of qudits.