Remote preparation and manipulation of squeezed light.

Area of Science:

• Quantum Optics
• Quantum Information Science
• Experimental Quantum Physics

Background:

• Remote state preparation (RSP) is a quantum communication protocol enabling the creation of quantum states at a distant location.
• Shared entanglement between distant nodes is the fundamental resource for RSP.
• Continuous variable (CV) quantum states, like squeezed light, are crucial for quantum information processing and quantum key distribution.

Purpose of the Study:

• To experimentally demonstrate the remote preparation and manipulation of squeezed light states.
• To investigate the robustness of remotely prepared squeezed states against photon loss.
• To explore the generation of multi-squeezed states via remote preparation.

Main Methods:

• Utilized a continuous variable entangled state shared between two distant stations (Alice and Bob).
• Performed homodyne projective measurements on one mode of the entangled state at Alice's station.
• Manipulated the remotely prepared squeezed state at Bob's station by altering Alice's measurement parameters.

Main Results:

• Successfully prepared and manipulated squeezed light states at Bob's station via remote state preparation.
• Demonstrated that the remotely prepared squeezed state exhibits robustness against photon loss.
• Showcased the remote preparation of N-1 squeezed states using an N-mode continuous variable Greenberger-Horne-Zeilinger-like state.

Conclusions:

• The experimental results validate entanglement-based models used in continuous variable quantum key distribution security analysis.
• The demonstrated remote preparation and manipulation of squeezed states hold significant potential for future remote quantum information processing applications.
• This work advances the capabilities of quantum communication protocols and their practical implementation.