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<p>We have investigated the squeezing and entanglement properties of light generated by a three-level laser coupled to a squeezed vacuum reservoir. We obtained the evolution equations for the cavity mode variables by using the relevant master equation. We characterized the cavity radiation’s squeezing characteristics, entanglement enhancement, and normalized second-order correlation function using the solution to these equations. We find that there is squeezing of the light emitted by a three-level laser, with a maximum squeezing of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(51\%\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>51</mn> <mo>%</mo> </mrow> </math></EquationSource> </InlineEquation>. The squeezing is mostly in the plus quadrature. Moreover, we have verified that raising the squeezed parameter enhances the photon numbers’ mean and variance. This work shows that entanglement in two-mode light and squeezing are directly related. Thus, greater entanglement is correlated with higher squeezing levels, and vice versa. This implies that entanglement is present in the system anytime two-mode light shows signs of squeezing. These insights have significant implications for advancing quantum technologies, such as quantum communication, where controlled squeezing and entanglement improve secure communication channels and signal-to-noise ratios, quantum computing, where they enhance error correction protocols and gate operation efficiencies, and quantum sensing, where they increase sensitivity for more precise measurements of physical quantities.</p>

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Coherent-light-induced entanglement in a three-level laser interacting with a squeezed vacuum reservoir

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Aliyyi Adem,
  • Tebarek Jewad

摘要

We have investigated the squeezing and entanglement properties of light generated by a three-level laser coupled to a squeezed vacuum reservoir. We obtained the evolution equations for the cavity mode variables by using the relevant master equation. We characterized the cavity radiation’s squeezing characteristics, entanglement enhancement, and normalized second-order correlation function using the solution to these equations. We find that there is squeezing of the light emitted by a three-level laser, with a maximum squeezing of \(51\%\) 51 % . The squeezing is mostly in the plus quadrature. Moreover, we have verified that raising the squeezed parameter enhances the photon numbers’ mean and variance. This work shows that entanglement in two-mode light and squeezing are directly related. Thus, greater entanglement is correlated with higher squeezing levels, and vice versa. This implies that entanglement is present in the system anytime two-mode light shows signs of squeezing. These insights have significant implications for advancing quantum technologies, such as quantum communication, where controlled squeezing and entanglement improve secure communication channels and signal-to-noise ratios, quantum computing, where they enhance error correction protocols and gate operation efficiencies, and quantum sensing, where they increase sensitivity for more precise measurements of physical quantities.