coupler_move

Full path: iqm.pulse.gates.coupler_move

Qubit-coupler move gate.

Population exchange operation between a qubit and a coupler directly.

• COUPLER_MOVE is unitary.

• COUPLER_MOVE is an involution up to a phase on the target subspace \(S = \text{Span}(|00\rangle,|01\rangle,|10\rangle)\), and introduces a relative phase to the ground state.

In the target subspace, COUPLER_MOVE can be represented as

\[\text{COUPLER_MOVE}_{S} = |00\rangle \langle 00| + e^{i\phi} |10\rangle \langle 01| + e^{i\phi}|01\rangle \langle 10|\]

Behaviour in the subspace orthogonal to the target subspace S (including the \(|11\rangle\) state) is not defined, although is excitation number preserving. The phase \(\phi\) is not cancelled when applied a second time and is left uncontrolled. For applications where this is important it should be determined by sweeping the phase of the final pulses.

Functions

coupler_flux_locus_mapping(sp)	Get custom locus mapping for this GateImplementation.
coupler_qubit_flux_locus_mapping(sp)	Get custom locus mapping for this GateImplementation.

Classes

CouplerMOVEGate	Two component coupler_move gate implemented using flux pulse and the interaction mediated by the coupler.
CouplerMOVE_CRF	COUPLER_MOVE gate using CRF on coupler only.
CouplerMOVE_CRF_CRF	COUPLER_MOVE gate using CRF on both qubit and coupler.

Inheritance