For the first time, researchers have teleported a logical qubit using fault-tolerant techniques. Based on the captured ions the task was solved for the processor. A major problem in developing a quantum computer suitable for practical rather than purely scientific purposes is the introduction of errors during the execution of calculations. One approach to reducing the number of errors has been the introduction of logical qubits, which are systems that combine multiple physical qubits to encode information.

Logical qubits are less error-prone than physical qubits: they are not as sensitive to noise and can use code to correct calculation errors. The main problem in the implementation of logical qubits remains the need to teleport information using quantum entanglement.

Qubit teleportation is a transfer process that is encoded according to the quantum state of the qubit. Teleportation of a logical qubit is quite different from teleportation of a regular qubit.

A team of engineers and physicists from the company quantumHe teleported a logical qubit that engaged in quantum computing. The research group worked with a self-developed H2 processor based on trapped ions, which allows transmission of quantum encoded data using entangled physical qubits.

To realize teleportation, researchers quantum tested two methods: the transverse and the “cage surgery” method. The crossover approach involves adding simultaneous operations to multiple qubits, which speeds up the teleportation process. The “lattice surgery” method involves manipulating the boundaries of qubits to perform operations; this allows compatibility between architectures.

The researchers showed that both methods are suitable for teleporting logic qubits, but each requires additional effort to produce an accurate result. Experts used real-time decoding using the Wall code (Stean code) allows the first demonstration of logical qubit teleportation using fault-tolerant methods to correct errors in the four steps of the teleportation process.

teamwork quantum It was another important step towards creating a true quantum computer. The group published a journal article about the setup used, the teleportation method, and the accuracy achieved. Science.