Researchers Demonstrate Quantum Operation without Any Direct Interaction


Researchers from Yale University demonstrated on-demand teleportation of a quantum gate between two quantum bits

Researchers from Yale University demonstrated a key approach in building the architecture for modular quantum computers. The approach highlights on demand teleportation of a quantum gate between two quantum bits. The research was described in the journal Nature on September 5, 2018. The researchers stated that the quantum teleportation was the key principle behind the research. Quantum teleportation was previously used to transmit unknown quantum states between two parties without physically sending the state itself. The researchers experimentally demonstrated a quantum operation without relying on any direct interaction with the help of a theoretical protocol developed in the 1990s. The quantum operations, also known as gates are necessary for quantum computation that relies on networks of separate quantum systems. Such network could possibly offset the errors that are inherent in quantum computing processors.

The research was led by principal investigator Robert Schoelkopf along with former graduate student Kevin Chou. Modularity is evident in almost every network including organization of a biological cell and network of engines in the latest SpaceX rocket. The phenomenon is used for building large and complex systems and could also be applied in quantum modular architecture as it consists of a collection of modules functioning as small quantum processors connected into a larger network. Modules in quantum modular architecture have a natural isolation from each other. Although such isolation reduces unwanted interactions through the larger system, it proves difficult in performing operations between modules.

Quantum computers could do calculations faster than current supercomputers and the Yale research is a major step in developing the first fully functional quantum computer. Quantum bits or qubits that perform calculations are prone to errors. Logical qubits in experimental quantum systems, are controlled by ancillary qubits. These ancillary qubits detect and correct errors caused by logical qubits. The current research demonstrated the first two-qubit operation between logical qubits.



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