Squeezed field modes are states of light that have been manipulated to have reduced quantum noise in one of its quadrature components. This is achieved through a process called squeezing, which redistributes the quantum noise from one quadrature to the other.
Squeezed field modes are created through a process called parametric down-conversion, where a high-intensity laser beam is passed through a nonlinear crystal to generate two lower-intensity beams with correlated quantum states. One of these beams is then further manipulated to produce the squeezed state.
Squeezed field modes have many potential applications in quantum technologies, such as quantum communication, precision measurement, and quantum computing. They can also be used in improving the sensitivity of gravitational wave detectors.
Squeezed field modes have a reduced level of quantum noise in one quadrature, while traditional laser light has equal noise in both quadratures. This makes squeezed field modes more useful for applications that require high precision and sensitivity.
While squeezed field modes are primarily used in quantum technologies, they can also have applications in classical communication. By reducing the quantum noise, squeezed field modes can improve the signal-to-noise ratio and enhance the performance of classical communication systems.