Novel mixed quantum bit system

Abstract

The invention discloses a novel mixed quantum bit system which comprises a first type of quantum bits and a second type of quantum bits, the first type of quantum bits and the second type of quantum bits bear different functions, and the first type of quantum bits and the second type of quantum bits are the same ions; the ions have at least two long-life energy levels, so that the first type of quantum bits and the second type of quantum bits can be coherently transferred between different long-life energy levels. According to the novel mixed quantum bit system provided by the embodiment of the invention, some long-life energy levels are selected as operation energy levels, and the rest long-life energy levels are selected as storage energy levels, so that when a part of quantum bits needto be operated, the rest quantum bits are coherently transferred to the storage energy levels for protective storage; therefore, crosstalk errors can be effectively eliminated. According to the novelmixed quantum bit system provided by the embodiment of the invention, the development of the fields of quantum networks, quantum computation, quantum precision measurement and the like can be promoted.

Description

technical field [0001] The invention relates to the fields of quantum network, quantum calculation, precision measurement and the like, and in particular relates to a novel hybrid qubit system. Background technique [0002] The hybrid qubit system includes two types of qubits, namely auxiliary qubits and data qubits, which undertake different functions. The data qubits are mainly responsible for the storage and operation of quantum information, and the auxiliary qubits are mainly responsible for destructive operations. Auxiliary operation. For example, in the collaborative cooling process, laser cooling is performed on the auxiliary qubit; in the quantum error correction process, the repeated measurement operation for extracting error information is performed on the auxiliary qubit; in the quantum network construction process, in order to realize the quantum node The repeated-measurement operation performed by the entanglement between the qubits is also performed on the aux...

AI Technical Summary

Problems solved by technology

However, the first scheme has the following disadvantages: the complexity of the system increases; the fidelity of the logic gate is low due to the difference in mass of the two ions; the number and position of the auxiliary qubits and data qubits are random

This scheme has the following disadvantages: the ion distance is too large, which will reduce the efficiency of cooperative cooling and logic gate preparation; the process of spatially moving ions will cause heating

[0008] All in all, the operation of only some qubits in the same system will cause crosstalk errors. The existing crosstalk error elimination schemes have many disadvantages and are not very scalable.

Images