qat.hardware.HardwareModel

class qat.hardware.HardwareModel(gates_specification=None, gate_noise=None, idle_noise=None, params_specification=None, jump_operators=None)

This object contains all necessary elements to describe a hardware (gates + environment).

Parameters

gates_specification (GatesSpecification) – specifies the gates of this hardware.
gate_noise (dict<str, ParametricQuantumChannel or lambda<args, QuantumChannel>>, optional) – specifies the noise to be (optionally) appended after each gate application. Defaults to None (no gate noise).
idle_noise (dict<int, list<ParametricQuantumChannel>> or list<ParametricQuantumChannel>, optional) – specifies the noise to be applied to idle qubits. Default to None (no idle noise).
params_specification (dict<str, Parameter>, optional) – specifies the parameters that are used in the Schedule fed to an analog QPU. Defaults to None.
jump_operators (list<Observable>, optional) – list of Lindblad jump operators (for analog QPUs). Defaults to None.

gates_specification

specifies the gates of this hardware.

Type: GatesSpecification

gate_noise

specifies the noise to be (optionally) appended after each gate application.

Type: dict<str, ParametricQuantumChannel or lambda<args, QuantumChannel>>

idle_noise

specifies the noise to be applied to idle qubits.

Type: dict<int, list<ParametricQuantumChannel>> or list<ParametricQuantumChannel>

params_specification

specifies the parameters that are used in the Schedule fed to an analog QPU.

Type: dict<str, Parameter>

jump_operators

list of Lindblad jump operators (for analog QPUs).

Type: list<Observable>

cleanup_jump_operators(): Remove constant jump operators, if any, since they don’t affect the dynamics

shift_jump_operators(shift: Union[List[complex], complex]) → Observable

Shift jump operators \(L_k\) by complex numbers \(\alpha_k\): \(L_k \rightarrow L_k - \alpha_k\).

To maintain the same Lindblad equation, the hamiltonian must be compensated: \(H \rightarrow H + \tilde H\) with

Parameters: shift (complex or list<complex>) – a complex scalar shift (same for all jump operators) or a list of such (one for each jump operator)
Returns: compensation to the hamiltonian \(\tilde H\).
Return type: Observable
Raises: ValueError – if no jump operator