Stack Configurations

class squidasm.run.stack.config.StackConfig(**data)

Configuration for a single stack (i.e. end node).

name: str

Name of the stack.

qdevice_typ: str

Type of the quantum device.

qdevice_cfg: Any

Configuration of the quantum device, allowed configuration depends on type.

classmethod from_file(path)

Load the configuration from a YAML file.

Return type:

StackConfig

classmethod perfect_generic_config(name)

Create a configuration for a stack with a generic quantum device without any noise or errors.

Return type:

StackConfig

Generic QDevice

The generic qdevice implements the following native gates:

X, Y, Z
Rot_X, Rot_Y, Rot_Z
H
CNOT, CZ

The rotation gates will rotate the qubit around the specified axis with a given angle.

class squidasm.run.stack.config.GenericQDeviceConfig(**data)

The configuration for a generic quantum device.

classmethod from_file(path)

Load the configuration from a YAML file.

Return type:

Any

classmethod perfect_config(num_qubits=100)

Create a configuration for a device without any noise or errors.

Parameters:

num_qubits (int) – number of qubits in the device.

Return type:

GenericQDeviceConfig

num_qubits: int

Number of qubits in the quantum device.

num_comm_qubits: int

Number of communication qubits. Not used.

T1: float

Energy or longitudinal relaxation time in nanoseconds.

T2: float

Dephasing or transverse relaxation time in nanoseconds.

init_time: float

Qubit initialization time in nanoseconds.

single_qubit_gate_time: float

Single qubit gate execution time in nanoseconds.

two_qubit_gate_time: float

Two qubit gate execution time in nanoseconds.

measure_time: float

Qubit measurement time in nanoseconds.

single_qubit_gate_depolar_prob: float

Probability of error in each single qubit gate operation.

two_qubit_gate_depolar_prob: float

Probability of error in each two qubit gate operation.

external_params: Optional[dict]

Dictionary of extra parameters that have no direct impact on the qdevice model, but are physically associated with the qdevice. It is typically used for parameters that relate to the entanglement generation, such as emission_fidelity.

NV QDevice

The NV qdevice implements the following native gates:

Rot_X, Rot_Y, Rot_Z
CXDIR, CYDIR

The CXDIR and CYDIR gates will rotate the target qubit like a Rot_X or Rot_Y gate with a given angle, but the direction of the rotation is controlled by the control qubit. Specifically:

\[CXDIR(\theta) = \ket{0}\bra{0} \otimes Rot\_X(\theta) + \ket{1}\bra{1} \otimes Rot\_X(-\theta)\]

The topology of the NV qdevice only allows for CXDIR and CYDIR gates between the electron and the carbon qubits.

class squidasm.run.stack.config.NVQDeviceConfig(**data)

The configuration for a nitrogen vacancy (NV) quantum device.

classmethod from_file(path)

Load the configuration from a YAML file.

Return type:

Any

classmethod perfect_config(num_qubits=100)

Create a configuration for a device without any noise or errors.

Parameters:

num_qubits (int) – number of qubits in the device.

Return type:

NVQDeviceConfig

num_qubits: int

Number of qubits in the quantum device.

electron_init_depolar_prob: float

Probability of error during electron initialization.

electron_single_qubit_depolar_prob: float

Probability of error during electron single gate operation.

prob_error_0: float

Probability of measuring a 1 instead of 0 in an electron measurement.

prob_error_1: float

Probability of measuring a 0 instead of 1 in an electron measurement.

carbon_init_depolar_prob: float

Probability of error during carbon initialization.

carbon_z_rot_depolar_prob: float

Probability of error during carbon single gate operation.

ec_gate_depolar_prob: float

Probability of error during native NV two qubit operation between electron and carbon.

electron_T1: float

Energy or longitudinal relaxation time in nanoseconds for the electron.

electron_T2: float

Dephasing or transverse relaxation time in nanoseconds for the electron.

carbon_T1: float

Energy or longitudinal relaxation time in nanoseconds for carbon qubits.

carbon_T2: float

Dephasing or transverse relaxation time in nanoseconds for carbon qubits..

carbon_init: float

Carbon qubit initialization time in nanoseconds.

carbon_rot_x: float

Carbon x rotation gate time in nanoseconds.

carbon_rot_y: float

Carbon y rotation gate time in nanoseconds.

carbon_rot_z: float

Carbon z rotation gate time in nanoseconds.

electron_init: float

Electron qubit initialization time in nanoseconds.

electron_rot_x: float

Electron x rotation gate time in nanoseconds.

electron_rot_y: float

Electron y rotation gate time in nanoseconds.

electron_rot_z: float

Electron z rotation gate time in nanoseconds.

ec_controlled_dir_x: float

Two qubit controlled x rotation gate time in nanoseconds.

ec_controlled_dir_y: float

Two qubit controlled y rotation gate time in nanoseconds.

measure: float

Electron measurement time in nanoseconds.

external_params: Optional[dict]

Dictionary of extra parameters that have no direct impact on the qdevice model, but are physically associated with the qdevice. It is typically used for parameters that relate to the entanglement generation, such as emission_fidelity.