SU(1,1)-type light-atom-correlated interferometer

Ma, Hongmei; Li, Dong; Yuan, Chun-Hua; Chen, L. Q.; Ou, Z. Y.; Zhang, Weiping

doi:10.1103/physreva.92.023847

Cited by 16 publications

(15 citation statements)

References 40 publications

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“…The LCC J n2 (n a2 ,n b2 ) is positive, and J n2 (n a2 ,n b2 ) ranges between 0 and 1. This decorrelation point (φ = 0) J x2 (x a2 ,x b2 ) = 0 is very important for atom-light hybrid interferometer using the homodyne detection [50]. At this point (φ = 0) the noise of output field [ (∆x a2 ) 2 = 1/4] is the same as that of input field and it is the lowest in our scheme as shown in Fig.…”

Section: The Correlations Of Atom-light Hybrid Interferometermentioning

confidence: 81%

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Effects of losses in the atom-light hybrid SU(1,1) interferometer

Chen¹,

Yuan²,

Ma³

et al. 2016

Opt. Express

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Collective atomic excitation can be realized by the Raman scattering. Such a photon-atom interface can form an SU(1,1)-typed atom-light hybrid interferometer, where the atomic Raman amplification processes take the place of the beam splitting elements in a traditional Mach-Zehnder interferometer. We numerically calculate the phase sensitivities and the signal-to-noise ratios (SNRs) of this interferometer with the method of homodyne detection and intensity detection, and give their differences of the optimal phase points to realize the best phase sensitivities and the maximal SNRs from these two detection methods. The difference of the effects of loss of light field and atomic decoherence on measure precision is analyzed.

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Section: The Correlations Of Atom-light Hybrid Interferometermentioning

confidence: 81%

“…In this section, we review the different processes of the atom-light interferometer [49,50] as shown in Fig. 1(a)-(c), where two Raman systems replaced the BSs in the traditional MZI.…”

Section: The Model Of Atom-light Hybrid Interferometermentioning

confidence: 99%

Effects of losses in the atom-light hybrid SU(1,1) interferometer

Chen¹,

Yuan²,

Ma³

et al. 2016

Opt. Express

Self Cite

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“…Recently, the atom-light hybrid interferometer has drawn considerable interest because it is sensitive to both optical and atomic phase shift [26][27][28][29][30][31]. There are two types of atom-light hybrid interferometers, which have been also demonstrated experimentally by our group.…”

Section: Introductionmentioning

confidence: 86%

Quantum non-demolition measurement based on an SU(1,1)-SU(2)-concatenated atom-light hybrid interferometer

Jiao,

Zhang,

Chen

et al. 2021

Preprint

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Quantum non-demolition (QND) measurement is an important tool in the field of quantum information processing and quantum optics. The atom-light hybrid interferometer is of great interest due to its combination of atomic spin wave and optical wave, which can be utilized for photon number QND measurement via the AC-Stark effect. In this paper, we present an actively correlated atom-light hybrid interferometer where the output is detected with the method of active correlation output readout via a nonlinear Raman process (NRP). Then this interferometer is used for QND measurement of photon number and the signal-to-noise ratio (SNR) is studied. Compared to the traditional SU(2) interferometer, the SNR in a balanced case is improved by a gain factor of g of NRP. Furthermore, the performance of QND measurement is analyzed. In the presence of losses, the measurement quality is reduced. We can adjust the gain parameter of the NRP in readout stage to reduce the impact due to losses. Moreover, this scheme is a multiarm interferometer, which has the potential of multiparameter estimation with many important applications in the detection of vector fields, quantum imaging and so on.

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“…1(a). There are two types of atom-light interferometers [28,29,32,33]. The first type is an analog of Mach-Zehnder/Michaelson optical interferometer but with atom-light mixer replacing regular beam splitters for linear superposition of atomic waves and optical waves [27,29].…”

Section: Qnd Measurement Of Photon Number By Atom-light Interferometersmentioning

confidence: 99%

Quantum non-demolition measurement of photon number with atom-light interferometers

Chen

et al. 2017

Opt. Express

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When atoms are illuminated by an off-resonant field, the AC Stark effect will lead to phase shifts in atomic states. The phase shifts are proportional to the photon number of the off-resonant illuminating field. By measuring the atomic phase with newly developed atom-light hybrid interferometers, we can achieve quantum non-demolition measurement of the photon number of the optical field. In this paper, we analyze theoretically the performance of this QND measurement scheme by using the QND measurement criteria established by Holland et al [Phys. Rev. A 42, 2995 (1990)]. We find the quality of the QND measurement depends on the phase resolution of the atom-light hybrid interferometers. We apply this QND measurement scheme to a twin-photon state from parametric amplifier to verify the photon correlation in the twin beams. Furthermore, a sequential QND measurement procedure is analyzed for verifying the projection property of quantum measurement and for the quantum information tapping. Finally, we discuss the possibility for single-photon-number-resolving detection via QND measurement.

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SU(1,1)-type light-atom-correlated interferometer

Cited by 16 publications

References 40 publications

Effects of losses in the atom-light hybrid SU(1,1) interferometer

Effects of losses in the atom-light hybrid SU(1,1) interferometer

Quantum non-demolition measurement based on an SU(1,1)-SU(2)-concatenated atom-light hybrid interferometer

Quantum non-demolition measurement of photon number with atom-light interferometers

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