Quantum entanglement criteria

Sumairi, AiniSyahida; Hazmin, S.N.; Ooi, C. H. Raymond

doi:10.1080/09500340.2013.796016

Cited by 7 publications

(16 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It corresponds to fewer photon pairs detecting closer together in time. The correlation of scattered photons is studied via the second-order correlation function of photo detection with respect to time, based on a photo detection experiment, for a coherent state, g 2 (τ) = 1 represents the highly correlated state [25,26,20]. In this state, the probability of joint detection coincides with the probabilities of independent detection [20].…”

Section: Photon Antibunchingmentioning

confidence: 99%

“…The correlation of scattered photons is studied via the second-order correlation function of photo detection with respect to time, based on a photo detection experiment, for a coherent state, g 2 (τ) = 1 represents the highly correlated state [25,26,20]. In this state, the probability of joint detection coincides with the probabilities of independent detection [20]. On the other hand, g 2 (τ) = 0 when the time delay approaches infinity, which means the joint probability of detecting the second photon decreases with time delay.…”

Section: Photon Antibunchingmentioning

confidence: 99%

“…On the other hand, g 2 (τ) = 0 when the time delay approaches infinity, which means the joint probability of detecting the second photon decreases with time delay. Thus, the situation g 2 (τ) < g 2 (0) is identified as photon bunching which means two photons tend to be detected simultaneously or after a short time delay [20]. If g 2 (τ) > g 2 (0), the joint probability of detecting the second photon increases 0000000 with time delay which is known as photon antipunching Here, g 2 for τ approach to 1 and g 2 (τ) < 1 implies the increased probability of detecting a second photon after a finite time delay, τ This contradiction is the result of the quantum nature of light [26].…”

Section: Photon Antibunchingmentioning

confidence: 99%

“…We carry out our analysis applying the pertinent master equation describing the dynamics of the optical device. Using the resulting solutions, the degree of entanglement for the cavity radiation using the Duan-Giedke-Cirac-Zoller, logarithmic negativity, Hillery-Zubairy and Cauchy-Schwartz inequality inseparability criteria are measured [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Quantum Entanglement and its Quantification in a Two-Mode Cascade Laser

Mosisa¹

2021

J Phy Opt Sci

View full text Add to dashboard Cite

In this paper, quantum entanglement of correlated two-mode light generated by a three-level laser coupled to a two-mode squeezed vacuum reservoir is thoroughly analyzed using different inseparability criteria, using the master equation, we obtain the stochastic dierential equation and the correlation properties of the noise forces associated with the normal ordering. Next, we study the photon entanglement by considering different inseparability criteria. In particular, the criteria applied are Duan-Giedke-Cirac-Zoller (DGCZ) criterion, logarithmic negativity, Hillery-Zubairy, and Cauchy-Schwartz inequality and we found that the presence of the squeezing parameter leads to an increase in the degree of entanglement. Moreover, the linear gain coecient significantly achieved the degree of entanglement for the cavity radiation

show abstract

Section: Photon Antibunchingmentioning

confidence: 99%

Section: Photon Antibunchingmentioning

confidence: 99%

Section: Photon Antibunchingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quantum Entanglement and its Quantification in a Two-Mode Cascade Laser

Mosisa¹

2021

J Phy Opt Sci

View full text Add to dashboard Cite

show abstract

“…Another relevant criterion of entanglement for the twomode light is violation of Cauchy-Schwarz inequality (VCSI). This criterion is related to the second-order correlation function to determine the entanglement exhibited by the quantum system [36]. A system of two-mode cavity radiation is said to be entangled if it violates VSCI criterion which can be put in the form:…”

Section: Violation Of Cauchy-schwarz Inequality (Vcsi)mentioning

confidence: 99%

Enhanced CV Entanglement Quantification in a CEL with Parametric Amplifier and Coupled to Squeezed Vacuum

Feyisa

2020

Braz J Phys

View full text Add to dashboard Cite

Externally induced entanglement amplification in a coherently pumped correlated emission laser (CEL) with parametric amplifier and coupled to a two-mode squeezed vacuum reservoir is presented. The combination of the master equation and stochastic differential equation is employed to investigate the entanglement of the two-mode light generated by the quantum system. The resulting solutions of the correlation properties of noise forces associated with the normal ordering are used to find the mean photon number of the cross-correlated mode and separate cavity modes, quadrature fluctuations, smallest eigenvalue of the symplectic matrix, and photon number correlation function. It is found that pumping atoms from the lower energy state to excited state results in a robust entanglement that remains in its maximum strength over a wide range of the strong classical driving radiation. The introduction of the nonlinear crystal into the linear cavity, and coupling the system to the two-mode squeezed vacuum environment lead to a significant enhancement of entanglement of the cavity light. The enhanced entanglement is quantified employing logarithmic negativity, Cauchy-Schwarz inequality, and Duan et al. criteria. It has been observed that an intense light can be produced where the entanglement is strong.

show abstract