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In this paper, we propose a protocol for complete Bell-state analysis for twosuperconducting-quantum-interference-device qubits. The Bell-state analysiscould be completed by using a sequence of microwave pulses designed by thetransition- less tracking algorithm, which is an useful method in the techniqueof shortcut to adiabaticity. After the whole process, the information fordistinguishing four Bell states will be encoded on two auxiliary qubits, whilethe Bell states keep unchanged. One can read out the information by detectingthe auxiliary qubits. Thus the Bell-state analysis is nondestructive. Thenumerical simulations show that the protocol possesses high success probabilityof distinguishing each Bell state with current experimental technology evenwhen decoherence is taken into account. Thus, the protocol may have potentialapplications for the information readout in quantum communications and quantumcomputations in superconducting quantum networks.

Complete Bell-state analysis for superconducting-quantum-interference-device qubits with transitionless tracking algorithm