Speeding up adiabatic population transfer in a Josephson qutrit via counter-diabatic driving

Two‐Qubit State Swap and Entanglement Creation in a Superconducting Circuit QED via Counterdiabatic Drivings

“…In the community of optimal quantum information processing, some theoretical proposals and experimental demonstrations have been recently investigated using the technique of counterdiabatic driving, which could remarkably speed up quantum operations on superconducting three-level atoms. [35,38,43,56] Based on these strategies, rapid state transfer within a single qutrit [38] and nonadiabatic geometric gates [43,56] have been explored. Differently, this paper concerns the construction of the accelerated and robust quantum controls over a composite qubit-photon-qubit, aiming at fast performing two-qubit state swap and entanglement creation in a shortcut manner.…”

“…To quantitatively characterize the effects of qubit decoherences and cavity decay, we adopt the fidelities [9,38]…”

“…[34][35][36] In recent years, the methods of STA have been increasingly applied to exploit optimal quantum operations on single superconducting artificial atoms both theoretically and experimentally. [37][38][39][40][41][42][43] As an interesting research direction, quantum manipulations of state swap and entanglement creation with superconducting qubits are highly desirable to scalable quantum information processing. [44][45][46] However, in the presence of dissipation and decoherence effects, one of the major obstacles to practical information processing is the difficulty of maintaining the high fidelities of quantum operations when many qubits are addressed together.…”

Fast and robust population transfer with a Josephson qutrit via shortcut to adiabaticity

“…The quantum states at the magic point are insensitive to the first-order dephasing effect, which thus contributes to prolong the decoherence time of the system 48 . Driven by the considered microwave fields, the first three levels at the magic point can be decoupled from the fourth level due to the prohibition of the level-transition rule 47 . Thus the three-level subspace is selected to constitute an effective qutrit under consideration.…”

“…It is found that the largely-detuned drivings could lead to slower operations than that induced by the resonant drivings. In another work 47 , assisted by a counter-diabatic driving, the accelerated QPT in a Δ-type qutrit has been explored using a Josephson charge-phase quantum circuit, where three different microwave drivings need to be applied to the qutrit simultaneously.…”