Phase space tweezers for tailoring cavity fields by quantum Zeno dynamics

Area of Science:

• Quantum physics
• Cavity quantum electrodynamics
• Quantum information science

Background:

• Quantum Zeno dynamics utilizes frequent measurements to inhibit system evolution.
• Cavity quantum electrodynamics studies interactions between quantum emitters and confined electromagnetic fields.

Purpose of the Study:

• To implement quantum Zeno dynamics for controlling quantum field evolution.
• To develop methods for tailoring nonclassical states of light.
• To propose a novel technique for manipulating coherent field states.

Main Methods:

• Performing repeated unitary operations on atoms coupled to a cavity field.
• Restricting field evolution within specific subspaces of the Hilbert space.
• Utilizing a "tweezer" analogy to describe state manipulation.

Main Results:

• Demonstrated control over quantum field evolution via Zeno dynamics.
• Proposed a method for selectively picking and moving coherent field states in phase space.
• Showcased the potential for creating and manipulating nonclassical states.

Conclusions:

• Quantum Zeno dynamics offers a powerful tool for quantum state engineering in cavity QED.
• The proposed "tweezer" mechanism provides a novel approach to coherent state manipulation.
• Experimental observation of these effects is feasible with current technology.