Kernel¶

class openql.openql.Kernel(*args)¶

Kernel class which contains various quantum instructions.

__init__(*args)¶

Constructs a Kernel object.

Parameters:	arg1 (str) – name of the Kernel arg2 (Platform) – target platform for which the kernel will be compiled arg3 (int) – qubit count arg4 (int) – classical register count

Methods

`__init__`(*args)	Constructs a Kernel object.
`barrier`(*args)	inserts explicit barrier on specified qubits.
`classical`(*args)	adds classical operation kernel.
`clifford`(id, q0)	Applies clifford operation of the specified id on the qubit.
`cnot`(q0, q1)	Applies controlled-not operation.
`conjugate`(k)	generates conjugate version of the kernel from the input kernel.
`controlled`(k, control_qubits, ancilla_qubits)	generates controlled version of the kernel from the input kernel.
`cphase`(q0, q1)	Applies controlled-phase operation.
`cz`(q0, q1)
`display`()	inserts QX display instruction (so QX specific).
`gate`(*args)	adds unitary to kernel.
`get_custom_instructions`()	Returns list of available custom instructions.
`hadamard`(q0)	Applies hadamard on the qubit specified in argument.
`identity`(q0)	Applies identity on the qubit specified in argument.
`measure`(q0)	measures input qubit.
`mrx90`(q0)	Applies mrx90 on the qubit specified in argument.
`mry90`(q0)
`prepz`(q0)
`rx`(q0, angle)
`rx180`(q0)	Applies rx180 on the qubit specified in argument.
`rx90`(q0)	Applies rx90 on the qubit specified in argument.
`ry`(q0, angle)
`ry180`(q0)	Applies ry180 on the qubit specified in argument.
`ry90`(q0)
`rz`(q0, angle)
`s`(q0)	Applies x on the qubit specified in argument.
`sdag`(q0)	Applies sdag on the qubit specified in argument.
`t`(q0)
`tdag`(q0)
`toffoli`(q0, q1, q2)	Applies controlled-controlled-not operation.
`wait`(qubits, duration)	inserts explicit wait of specified duration on specified qubits.
`x`(q0)
`y`(q0)	Applies y on the qubit specified in argument.
`z`(q0)	Applies z on the qubit specified in argument.

Attributes

`creg_count`
`kernel`
`name`
`platform`
`qubit_count`

barrier(*args)¶

inserts explicit barrier on specified qubits.

wait with duration ‘0’ is also equivalent to applying barrier on specified list of qubits. If no qubits are specified, then barrier is applied on all the qubits.

Parameters:	arg1 ([]) – list of qubits

classical(*args)¶

adds classical operation kernel.

Parameters:	arg1 (CReg) – destination register for classical operation. arg2 (Operation) – classical operation.

clifford(id, q0)¶

Applies clifford operation of the specified id on the qubit.

The ids and the corresponding operations are:

id	Operations
0	[‘I’]
1	[‘Y90’, ‘X90’]
2	[‘mX90’, ‘mY90’]
3	[‘X180’]
4	[‘mY90’, ‘mX90’]
5	[‘X90’, ‘mY90’]
6	[‘Y180’]
7	[‘mY90’, ‘X90’]
8	[‘X90’, ‘Y90’]
9	[‘X180’, ‘Y180’]
10	[‘Y90’, ‘mX90’]
11	[‘mX90’, ‘Y90’]
12	[‘Y90’, ‘X180’]
13	[‘mX90’]
14	[‘X90’, ‘mY90’, ‘mX90’]
15	[‘mY90’]
16	[‘X90’]
17	[‘X90’, ‘Y90’, ‘X90’]
18	[‘mY90’, ‘X180’]
19	[‘X90’, ‘Y180’]
20	[‘X90’, ‘mY90’, ‘X90’]
21	[‘Y90’]
22	[‘mX90’, ‘Y180’]
23	[‘X90’, ‘Y90’, ‘mX90’]

Parameters:	arg1 (int) – clifford operation id arg2 (int) – target qubit

cnot(q0, q1)¶

Applies controlled-not operation.

Parameters:	arg1 (int) – control qubit arg2 (int) – target qubit

conjugate(k)¶

generates conjugate version of the kernel from the input kernel.

Parameters:	arg1 (ql::Kernel) – input kernel. Except measure, Kernel to be conjugated.
Returns:
Return type:	None

controlled(k, control_qubits, ancilla_qubits)¶

generates controlled version of the kernel from the input kernel.

Parameters:	arg1 (ql::Kernel) – input kernel. Except measure, Kernel to be controlled may contain any of the default gates as well custom gates which are not specialized for a specific qubits. arg2 ([]) – list of control qubits. arg3 ([]) – list of ancilla qubits. Number of ancilla qubits should be equal to number of control qubits.
Returns:
Return type:	None

cphase(q0, q1)¶

Applies controlled-phase operation.

Parameters:	arg1 (int) – control qubit arg2 (int) – target qubit

display()¶

inserts QX display instruction (so QX specific).

Parameters:	None –
Returns:
Return type:	None

gate(*args)¶

adds unitary to kernel.

Parameters:	arg1 (Unitary) – unitary matrix arg2 ([]) – list of qubits

get_custom_instructions()¶

Returns list of available custom instructions.

Parameters:	None –
Returns:	List of available custom instructions
Return type:	[]

hadamard(q0)¶

Applies hadamard on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

identity(q0)¶

Applies identity on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

measure(q0)¶

measures input qubit.

Parameters:	arg1 (int) – input qubit

mrx90(q0)¶

Applies mrx90 on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

rx180(q0)¶

Applies rx180 on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

rx90(q0)¶

Applies rx90 on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

ry180(q0)¶

Applies ry180 on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

s(q0)¶

Applies x on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

sdag(q0)¶

Applies sdag on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

toffoli(q0, q1, q2)¶

Applies controlled-controlled-not operation.

Parameters:	arg1 (int) – control qubit arg2 (int) – control qubit arg3 (int) – target qubit

wait(qubits, duration)¶

inserts explicit wait of specified duration on specified qubits.

wait with duration ‘0’ is equivalent to barrier on specified list of qubits. If no qubits are specified, then wait/barrier is applied on all the qubits.

Parameters:	arg1 ([]) – list of qubits arg2 (int) – duration in ns

y(q0)¶

Applies y on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit

z(q0)¶

Applies z on the qubit specified in argument.

Parameters:	arg1 (int) – target qubit