iqm.cirq_iqm.iqm_gates.IQMMoveGate#
- class iqm.cirq_iqm.iqm_gates.IQMMoveGate(*, exponent: float | Expr = 1.0, global_shift: float = 0.0)#
Bases:
EigenGateThe MOVE operation is a unitary population exchange operation between a qubit and a resonator. Its effect is only defined in the invariant subspace \(S = \text{span}\{|00\rangle, |01\rangle, |10\rangle\}\), where it swaps the populations of the states \(|01\rangle\) and \(|10\rangle\). Its effect on the orthogonal subspace is undefined.
MOVE has the following presentation in the subspace \(S\):
\[\text{MOVE}_S = |00\rangle \langle 00| + a |10\rangle \langle 01| + a^{-1} |01\rangle \langle 10|,\]where \(a\) is an undefined complex phase that is canceled when the MOVE gate is applied a second time.
To ensure that the state of the qubit and resonator has no overlap with \(|11\rangle\), it is recommended that no single qubit gates are applied to the qubit in between a pair of MOVE operations.
Note: At this point the locus for the move gate must be defined in the order:
[qubit, resonator]. Additionally, the matrix representation of the gate set to be a SWAP gate, even though this is not what physically happens.Attributes
Methods
__str__()Return str(self).
_circuit_diagram_info_(args)_eigen_components()Describes the eigendecomposition of the gate's matrix.
_num_qubits_()The number of qubits this gate acts on.
_qid_shape_()Returns a Tuple containing the number of quantum levels of each qid the gate acts on.
The number of qubits this gate acts on.