One-spin quantum logic gates from exchange interactions and a global magnetic field

Area of Science:

• Quantum Computing
• Quantum Information Science
• Condensed Matter Physics

Background:

• One-qubit gates are fundamental operations in quantum computation.
• Previous approaches for one-qubit gates in spin-based quantum computers faced significant technical challenges.
• The need for precise single-spin addressing limited scalability and practicality.

Purpose of the Study:

• To demonstrate a feasible method for generating one-qubit gates in spin-based quantum computers.
• To overcome the technical difficulties associated with previous gate implementations.
• To propose a scalable and practical approach for quantum gate operations.

Main Methods:

• Utilizing global magnetic fields for qubit manipulation.
• Employing controllable Heisenberg exchange interactions between spins.
• Circumventing the requirement for individual single-spin addressing.

Main Results:

• Successfully generated one-qubit gates using modest technological requirements.
• Demonstrated the feasibility of the proposed method with current technology.
• Showcased a viable alternative to complex single-spin addressing techniques.

Conclusions:

• One-qubit gates in spin-based quantum computers are achievable with current technology.
• The proposed method offers a practical and scalable solution for quantum gate implementation.
• Global magnetic fields and exchange interactions provide an efficient route to quantum computation.