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Researchers created a trapped-ion system that acts like a quantum laser operating near the ground state. They controlled its phase-locking and phase diffusion, offering new insights into quantum dynamics.

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Area of Science:

  • Quantum optics
  • Atomic physics
  • Condensed matter physics

Background:

  • Trapped-ion systems are crucial for quantum simulations and quantum information processing.
  • Understanding dissipation channels is key to controlling quantum states.

Purpose of the Study:

  • To investigate a trapped-ion system with competing dissipation channels.
  • To explore a quantum regime analogous to a phonon laser operating near the ground state.

Main Methods:

  • Utilizing a two-species ion system in a Paul trap.
  • Controlling coherent spin-oscillator couplings and optical pumping rates.
  • Reconstructing the quantum state via characteristic function measurements.

Main Results:

  • Demonstrated a regime analogous to a phonon laser with average phonon number <10.
  • Achieved phase locking of the oscillator to a resonant drive.
  • Observed phase diffusion under dissipation.

Conclusions:

  • The study showcases a novel quantum laser regime in a controllable trapped-ion system.
  • Phase locking and diffusion were successfully demonstrated and analyzed.
  • This work provides a platform for exploring quantum dynamics near the ground state.