Entanglement of Gaussian states using a 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 state͒ 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.

Beam Splitter-Mediated Quantum Information Processing Employing Momentum States of the Neutral Atoms

“…Amount of entanglement depends upon the non-classicality and the purity of the input states [21,32]. Here we show that detection of photonic state after passage through the beam splitter may result in the entanglement of atomic momentum states.…”

“…The merger of linear optics and cavity QED via utilization of the beam splitter, a simple most quantum device [12][13][14], is also not new and beam splitters have been rather extensively employed to assist state engineering tasks in cavity QED scenario [15][16][17][18][19][20][21]. However, almost all of this research is so for limited to only generation of either the cavity field states or the atomic internal states.…”

Efficient creation of continuous-variable entanglement for two atomic ensembles in coupled cavities

“…Therefore, it is not surprising that the theoretical and experimental research of CV entanglement has seen tremendous progress. Different authors have experimentally realized multimode CV entanglement using beam splitters (BS) [6][7][8]. However, only entanglement of modes with the same frequency can be produced, because the transformation of BS is linear.…”

Curvature detection by entanglement generation using a beam splitter

“…In quantum optics, its effect, as a lossless four-port, is mathematically described by a unitary transformation connecting the input fields and the output fields [11]. The entangling properties of a beam splitter with different input states such as Fock states, coherent states, squeezed states, thermal states and Gaussian mixed states are studied [4,[12][13][14]. However, in order to obtain entangled output states of a beam splitter, a necessary condition is that at least one of the input fields should be non-classical [4].…”