Electromagnetically induced transparency with noisy lasers

Xiao, Yanhong; Wang, Tun; Baryakhtar, Masha; Camp, Mackenzie Van; Crescimanno, Michael; Hohensee, Michael; Jiang, Liang; Phillips, David F.; Lukin, Mikhail D.; Yelin, Susanne F.; Walsworth, Ronald L.

doi:10.1103/physreva.80.041805

Cited by 35 publications

(46 citation statements)

References 29 publications

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“…2b and c. We summarize our comparison between experiment and theory for EIT noise after a polarization basis change as follows: 1) Shift: For rotations of the QWP beyond 45 • , the metrologically relevant central peak of g (2) (0) is no longer at zero two-photon detuning. The direction and magnitude of the shift is well accounted for in the three level atomic model, [16,22]. For rotations of the post-cell quarter wave plate beyond its nominal 45 • orientation we show in Fig.…”

Section: Resultsmentioning

confidence: 89%

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Electromagnetically induced transparency (EIT) amplitude noise spectroscopy

et al. 2020

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Intensity noise cross-correlation of the polarization eigenstates of light emerging from an atomic vapor cell in the Hanle configuration allows one to perform high resolution spectroscopy with freerunning semiconductor lasers. This shows promise as an inexpensive and simpler approach to magnetometry and timekeeping, and as a probe of dynamics of atomic coherence in warm vapor cells. We report here that varying the post-cell polarization state basis yields intensity noise spectra which reveal details about the prepared atomic state. We advance and test the hypothesis that the observed intensity noise can be explained in terms of an underlying stochastic process in light field amplitudes themselves. Understanding this stochastic process in the light field amplitudes themselves provides an additional test of the three level system model of EIT noise.

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Section: Resultsmentioning

confidence: 89%

“…(see, for example, Refs. [16,22]). The model consists of a three level Λ system (ground states |1 and |2 , and excited state |0 , see Fig.…”

Section: Theorymentioning

confidence: 99%

Electromagnetically induced transparency (EIT) amplitude noise spectroscopy

et al. 2020

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“…34, 35 Figures 2(b,c) show one example of EIT effect on output quantum noise, which can be potentially used for noninvasive noise spectroscopy. 39,40 For these measurements we detuned the control field frequency (i.e., the EOM modulation frequency) by ±1.3 MHz away from the twophoton resonance. In this case only the part of the noise spectrum that falls within EIT resonance is transmitted.…”

Section: Quantum Noise Manipulations Using Eit Resonancesmentioning

confidence: 99%

Propagation of quantum optical fields under the conditions of multi-photon resonances in a coherent atomic vapor

et al. 2013

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We experimentally investigate a weak optical probe pulse propagation under the EIT conditions through a hot Rb vapor cell, and analyze the quantum noise modification resulting from interaction with atoms. We focus on understanding the sources of excess noise, observed after the EIT vapor cell in the case of both squeezed vacuum and coherent optical probe fields. We show that a small non-zero average amplitude of the probe field (due to imperfect polarization filtering) gives rise to a phase-sensitive excess quantum noise that grows with atomic density.

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“…Strictly speaking, the squeezing of the delayed output state in an EIT medium has not been retained the same as that of input state [57], and the squeezing property of the retrieved state after a storage time has decreased [22,23]. To qualify the efficiency of the squeezing propagation or storage in an EIT system, experimental studies have discovered an approach to repress the noise of output delay light via decreasing the detection frequency or operating the system at off one or two-photon resonance [58,59,60,61,62]. Now, assume that the state |1 b |0 c is inserted to BS1, then the output state becomes shifterP = e iN θ , transform the state 1 √ 2 |ξ a (|10 bc + i|01 bc ) to Choosing different parameters τ, τ and θ, one may obtain the various entangled states [16].…”

Section: Entanglement Of Two-mode Qubit Like Essmentioning

confidence: 99%

Comparison of qubit and qutrit like entangled squeezed and coherent states of light

Najarbashi

Mirzaei

2016

Optics Communications

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Squeezed state of light is one of the important subjects in quantum optics which is generated by optical nonlinear interactions. In this paper, we especially focus on qubit like entangled squeezed states (ESS's) generated by beam splitters, phase-shifter and cross Kerr nonlinearity. Moreover the Wigner function of two-mode qubit and qutrit like ESS are investigated. We will show that the distances of peaks of Wigner functions for two-mode ESS are entanglement sensitive and can be a witness for entanglement. Like the qubit cases, monogamy inequality is fulfilled for qutrit like ESS. These trends are compared with those obtained for qubit and qutrit like entangled coherent states (ECS).

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Electromagnetically induced transparency with noisy lasers

Cited by 35 publications

References 29 publications

Electromagnetically induced transparency (EIT) amplitude noise spectroscopy

Electromagnetically induced transparency (EIT) amplitude noise spectroscopy

Propagation of quantum optical fields under the conditions of multi-photon resonances in a coherent atomic vapor

Comparison of qubit and qutrit like entangled squeezed and coherent states of light

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