By entangling three or more qubits, GHZ states go one step further and increase. The results show that the error-correction performance of non-Gaussian data is better than Gaussian data, where the frame error rate can be reduced by 50 % for code rate 0.1 at SNR of 0.1554 and the average iteration number can be reduced by 25 %. 2 days ago &0183 &32 Qubits, the quantum counterpart of traditional binary bits, are used in quantum computing to store and process data. Furthermore, we compare the error-correction performance of Gaussian data and non-Gaussian data. Renes Institut fur Angewandte Physik, Technische Universitat Darmstadt, Hochschulstr. ![]() Multidimensional reconciliation and multiedge-type low-density parity-check codes (MET LDPC) are used in a non-Gaussian reconciliation scheme, where the layered belief propagation decoding algorithm of MET LDPC codes is used to reduce the decoding complexity. arXiv:1003.1150v3 quant-ph Approximate Quantum ErrorCorrectionvia Complementary Observables Joseph M. In this paper, we propose a non-Gaussian reconciliation method to obtain identical keys from non-Gaussian data. Recent theoretical work has proposed a complementary technique based on ‘spectator’ qubits: additional qubits that are co-located with the computational ‘data’ qubits and are susceptible to the same noise sources. However, non-Gaussian reconciliation has not been deeply researched, which is one of the key technologies in CV QKD. The black dots represent data qubits, while the white dots represent ancilla qubits for measurements. ![]() For Gaussian-modulated coherent-state CV QKD, photon subtraction can realize non-Gaussian modulation, which can be equivalently implemented by non-Gaussian postselection. Measurement and correction circuit for the vertex errors. ![]() Non-Gaussian modulation can improve the performance of continuous-variable quantum key distribution (CV QKD). Researchers at Yale University led by Prof. For realistic continuous-time dissipative evolution, the codes can perform approximate quantum error correction to any given order in the timestep between. Quantum errors consist of more than just bit-flip errors, though, making this simple three-qubit repetition code unsuitable for protecting against all possible quantum errors.
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