German Quantum Computer based on Superconducting Qubits (GEQCOS)
Motivation
Quantum computers open up a completely new dimension in computer technology. They can be used to solve problems where conventional computers fail. For example, it is hoped that they can be used to simulate the interaction of atoms and molecules in organisms and material structures, which could lead to groundbreaking successes in the development of medicines and new materials. So far, this is still theory. The road to realizing a quantum computer is still long, and here, too, it begins with the first steps.
Goals and procedure
The realization of quantum computers and the generation of the so-called quantum bits or qubits for short, which are necessary for its function, is currently a major challenge. The associated quantum states are generally very sensitive to external influences and are not very stable. This is currently a major obstacle to practical use. To make progress in this area, the partners of the GEQCOS collaborative project are pursuing a new approach to generate qubits based on superconducting circuits. The goal is to realize a quantum processor that can be used to demonstrate the viability of the chosen concept.
Innovation and perspectives
For the function of a quantum computer, the so-called entanglement of the qubits is necessary. This entanglement state is only present for a certain time, also called coherence time. Only in this time can the quantum computer compute. With the aforementioned approach to coupling the qubits, efficient operations with multiple qubits should now become feasible. At the same time, the coherence time can be increased with this approach to enable more extensive quantum operations than before. If successful, this will be an essential step towards practical quantum computers with a sufficient number of qubits for solving application-related problems.
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