Towards quantum entanglement in nanoelectromechanical devices

Area of Science:

• Quantum mechanics
• Mesoscopic physics
• Nanoelectromechanical systems (NEMS)

Background:

• Quantum entanglement is a fundamental phenomenon crucial for quantum technologies.
• Controlling and generating entanglement in macroscopic mechanical systems remains a significant challenge.
• Nanoelectromechanical resonators offer a promising platform for exploring quantum phenomena at larger scales.

Purpose of the Study:

• To demonstrate entanglement generation between spatially separated mechanical oscillators.
• To investigate entanglement transport in arrays of nanoelectromechanical resonators.
• To explore methods for achieving entanglement without direct interaction or individual oscillator control.

Main Methods:

• Utilizing an array of nanoelectromechanical resonators with voltage-controlled interactions.
• Employing sudden non-adiabatic switching of interactions to induce mechanical state squeezing.
• Analyzing entanglement generation and transport dynamics in one-dimensional chains.

Main Results:

• Successful demonstration of entanglement between distant mechanical oscillators.
• Observation of entanglement transport along chains of resonators.
• Identification of robustness of entanglement in canonical coordinates under various conditions (spatial dimensions, Q factors, temperature, decoherence).

Conclusions:

• The proposed scheme enables entanglement generation and transport in mechanical oscillator arrays.
• The method is robust against certain decoherence sources and environmental factors.
• Further research is needed to address the challenges in detecting the generated entanglement.