Ion-trap quantum logic using long-wavelength radiation

Area of Science:

• Quantum information science
• Atomic physics
• Quantum computing

Background:

• Quantum information processors leverage principles of quantum mechanics to perform computations.
• Existing technologies like nuclear magnetic resonance (NMR) and trapped ions have demonstrated key quantum functionalities.
• Coherent manipulation of individual quantum bits (qubits) is essential for scalable quantum information processing.

Purpose of the Study:

• To propose a novel quantum information processor architecture.
• To integrate successful experimental techniques from NMR and trapped ion systems.
• To enable individual addressing and coherent manipulation of qubits in an ion trap.

Main Methods:

• Utilizing an ion trap with an applied inhomogeneous magnetic field.
• Shifting individual ionic resonances (qubits) by frequency for distinguishability.
• Mediating coupling between internal and external degrees of freedom of trapped ions.
• Employing radiofrequency or microwave radiation for qubit manipulation.

Main Results:

• Demonstrated a method for individually addressing qubits in an ion trap.
• Established a mechanism for coherent manipulation of trapped ion qubits.
• Combined techniques from NMR and trapped ion experiments into a unified processor design.

Conclusions:

• The proposed scheme offers a viable pathway for building advanced quantum information processors.
• The integration of NMR and trapped ion techniques provides a robust platform for quantum computation.
• Individual qubit manipulation and coherent control are achievable using the described magnetic field and radiation methods.