Entanglement of superconducting qubits via acceleration radiation

Area of Science:

• Quantum optics
• Quantum information science
• Solid-state physics

Background:

• Superconducting qubits coupled to resonators are crucial for quantum computing.
• Relativistic effects in quantum systems are theoretically interesting but experimentally challenging.
• Spontaneous emission is a major source of decoherence in quantum systems.

Purpose of the Study:

• To investigate the generation of entanglement between superconducting qubits using simulated relativistic motion.
• To explore the impact of relativistic motion on spontaneous emission and superradiance.
• To identify conditions for creating stable entangled states and protecting quantum information.

Main Methods:

• Simulating relativistic motion by modulating qubit-resonator coupling strength.
• Analyzing acceleration radiation generated by simulated relativistic motion.
• Calculating entanglement generation and spontaneous emission probabilities under relativistic conditions.
• Investigating single-atom and two-atom superradiance and sub-radiance phenomena.

Main Results:

• Simulated relativistic motion can generate stationary entangled states between superconducting qubits.
• Relativistic motion can suppress spontaneous emission, protecting quantum excitations.
• The study identified optimal conditions for entanglement generation.
• Relativistic motion was shown to induce sub-radiance and a Zeno-like effect.

Conclusions:

• Simulated relativistic motion offers a novel pathway to generate and protect entanglement in superconducting qubits.
• This approach provides a method to combat decoherence caused by spontaneous emission.
• The findings have implications for quantum information processing and fundamental quantum physics.