Entanglement of Gaussian states using beam splitter

Abstract

We study an experimental scheme to generate Gaussian two-mode entangled states via beam splitter. Specifically, we consider a nonclassical Gaussian state (squeezed state) and a thermal state as two input modes, and evaluate the degree of entanglement at the output. Experimental conditions to generate entangled outputs are completely identified and the critical thermal noise to destroy entanglement is analytically obtained. By doing so, we discuss the possibility to link the resistance to noise in entanglement generation with the degree of single-mode nonclassicality.

6 pages, 3 figures, references added (particularly [19]), more detailed discussions

References in corpus (8)

• Quantum information with Gaussian states
• A computable measure of nonclassicality for light
• Purity of Gaussian states: measurement schemes and time-evolution in noisy channels
• Entanglement conditions for two-mode states: Applications
• Uncertainty inequalities as entanglement criteria for negative partial-transpose states
• Entanglement Detection Based on Interference and Particle Counting
• Entanglement condition via su(2) and su(1,1) algebra using Schr{ö}dinger-Robertson uncertainty relation
• Complete conditions for legitimate Wigner distributions