At present, one of the biggest problems facing quantum computers is how to increase the number of entangled qubits in each logic gate, which is crucial for the development of practical quantum computing devices.The difficulty of upgrading is due in part to the trapped ions , The problem of 'spectral crowding' will be encountered as the number of qubits increases.However, the system of imprisoning Reid's ions is not affected by the problem of spectrum crowding, which shows that imprisoning The quantum computer developed by Ritterberger as a quantum bit may be able to become a more powerful quantum computer.
In a recent paper in the Physical Review Letters, the researchers said they built the first single quantum bit Reedberger, and in order to do so, it was necessary to create a coherent Riederthal excitation of a single ion. Start with a strontium trapped in a trap, then use a laser to excite ions from a low quantum state to a first excited state and then to a more energetic Rydberg state.
The key to the experiment is that the Riedeburg state is coherently obtained, which is crucial for the construction of the multi-quantum bit Reedberger.The researchers combined coherent Riederthal excitation with a quantum manipulation method to show that single quantum Bitritberger, who estimates that the single-qubit system can be extended to a two-qubit system and more can be added in the future.
In addition to potential upgrade benefits, quantum computers based on imprisoned Riedeber ions have other advantages, including better control of quantum bits, faster gate calculations, etc. They will further investigate these possibilities.
Gerald Higgins, head of research, said: 'Next, we will measure the intense interaction between two Rydberg ions and entangle them. The trapped Rydberg ions have the potential to generate very large entanglements State