Measurement-based preparation of multimode mechanical states

Area of Science:

• Quantum physics
• Nanotechnology
• Quantum optics

Background:

• Nanomechanical resonators are crucial for quantum technologies like sensors and interfaces.
• Preparing nonclassical states at room temperature remains a significant challenge.
• Fast continuous measurement is a proposed method to break position-momentum symmetry.

Purpose of the Study:

• To demonstrate symmetry breaking in nanomechanical resonators.
• To prepare a thermally squeezed mechanical state at room temperature.
• To explore the potential of multimode measurements for quantum state preparation.

Main Methods:

• Utilizing fast continuous measurement to break symmetry between position and momentum.
• Employing collective measurements on multiple mechanical modes.
• Theoretical analysis extending the findings to the quantum regime.

Main Results:

• Successfully demonstrated symmetry breaking and prepared a thermally squeezed mechanical state.
• Showcased that collective measurements enhance measurement speed and state preparation.
• Theoretically showed relaxed requirements for generating nonclassical states.

Conclusions:

• Multimode conditioning can enable room-temperature quantum squeezing with current technology.
• This work advances the development of room-temperature quantum nanomechanical devices.
• Paves the way for applications in quantum technology and fundamental science.