Abstract
We construct shortcuts to adiabatic passage to achieve controllable and fast quantum-information transfer (QIT) between arbitrary two distant nodes in a two-dimensional (2D) quantum network. Through suitable designing of time-dependent Rabi frequencies, we show that perfect QIT between arbitrary two distant nodes can be rapidly achieved. Numerical simulations demonstrate that the proposal is robust to the decoherence caused by atomic spontaneous emission and cavity photon leakage. Additionally, the proposed scheme is also insensitive to the variations of the experimental parameters. Thus, the proposed scheme provides a new perspective on robust quantum information processing in 2D quantum networks.
Highlights
In quantum information and quantum computation, one of the essential ingredients is the realization of controllable and fast quantum-information transfer (QIT) between arbitrary remote nodes in a quantum network
We have proposed protocols to realize the coherent coupling of multiple atoms[40] and to realize two-qubits unconventional geometric phase gates in a 2D coupled cavity array[41]
It has been shown that a system can evolve away from its initial state, but still remain in the Zeno subspace defined by the measurements via frequently projecting onto a multidimensional subspace, which is known as quantum Zeno dynamics (QZD)[46,47,48]
Summary
Λ-type three-level atom and can respectively couple to their neighboring ones through the x and y directions with intercavity photon hopping. (b) The atom level scheme. The distinguished advantages of the proposal are: (i) information can be controllably transferred between arbitrary two nodes; (ii) the time to accomplish the task is shorter than that in conventional adiabatic passage technique; (iii) it is robust against the parameters fluctuations and the decoherence caused by atomic spontaneous emission and cavity photon leakage. It provides a new perspective on robust quantum information processing in 2D quantum networks in the future. Once the Rabi frequencies are specially designed, the fast QIT from initial state to the target state in subsystem S1 will be implemented
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