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Related Experiment Video

Updated: Dec 9, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Deterministic Generation of Large Fock States.

M Uria¹, P Solano^2,3, C Hermann-Avigliano¹

¹Departamento de Física and Millennium Institute for Research in Optics (MIRO), Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago 8370448, Chile.

Physical Review Letters

|September 11, 2020

Summary

Researchers developed a method to create large photon number states, a significant step towards macroscopic quantum states. This technique deterministically prepares the electromagnetic field in a Fock state using two-level systems.

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Area of Science:

Quantum optics
Quantum information science

Background:

Generating Fock states is crucial for quantum technologies.
Previous methods often required postselection or were limited in photon number.

Purpose of the Study:

To present a protocol for deterministic preparation of large photon number Fock states.
To demonstrate the feasibility of the scheme with realistic parameters.

Main Methods:

Starting with a coherent state, the electromagnetic field interacts resonantly with one or few two-level systems.
The interaction deterministically evolves the field into a coherently displaced Fock state without postselection.

Main Results:

The protocol can generate Fock states with photon numbers around 100 (n~100).
Optimal fidelities above 70% are achievable.
The scheme is feasible under realistic experimental parameters.

Conclusions:

This method provides a pathway to generate large Fock states, approaching the boundary between quantum and macroscopic regimes.
It offers a significant advancement for quantum optics and quantum information processing.