cirq_google.ops.SycamoreGate

The Sycamore gate is a two-qubit gate equivalent to FSimGate(π/2, π/6).

The unitary of this gate is

[[1, 0, 0, 0],
 [0, 0, -1j, 0],
 [0, -1j, 0, 0],
 [0, 0, 0, exp(- 1j * π/6)]]

This gate can be performed on the Google's Sycamore chip and is close to the gates that were used to demonstrate quantum supremacy used in this paper: https://www.nature.com/articles/s41586-019-1666-5

Methods

controlled

Returns a controlled version of this gate. If no arguments are specified, defaults to a single qubit control.

num_controls: Total number of control qubits. control_values: For which control qubit values to apply the sub gate. A sequence of length num_controls where each entry is an integer (or set of integers) corresponding to the qubit value (or set of possible values) where that control is enabled. When all controls are enabled, the sub gate is applied. If unspecified, control values default to 1. control_qid_shape: The qid shape of the controls. A tuple of the expected dimension of each control qid. Defaults to (2,) * num_controls. Specify this argument when using qudits.

num_qubits

The number of qubits this gate acts on.

on

Returns an application of this gate to the given qubits.

Args
*qubits The collection of qubits to potentially apply the gate to.

qubit_index_to_equivalence_group_key

Returns a key that differs between non-interchangeable qubits.

validate_args

Checks if this gate can be applied to the given qubits.

By default checks that:

  • inputs are of type Qid
  • len(qubits) == num_qubits()
  • qubit_i.dimension == qid_shape[i] for all qubits

Child classes can override. The child implementation should call super().validate_args(qubits) then do custom checks.

Args
qubits The sequence of qubits to potentially apply the gate to.

Throws:

  • ValueError: The gate can't be applied to the qubits.

with_probability

wrap_in_linear_combination

__add__

__call__

Call self as a function.

__eq__

__mul__

__ne__

__neg__

__pow__

__rmul__

__sub__

__truediv__