Quantum Enhancement of Phase Sensitivity for the Bright-Seeded SU(1,1) Interferometer with Direct Intensity Detection

Liu, Shengshuai; Lou, Yanbo; Xin, Jun; Jing, Jietai

doi:10.1103/physrevapplied.10.064046

Cited by 47 publications

(19 citation statements)

References 39 publications

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“…For gain values greater than unity, the second and third terms dominate in the SNL, and the phase sensitivity grows exponentially, similarly to the case without a seed, see Fig. (12). In other words, the single-photon seed leads to an imbalance in the signal-idler photon correlations for low gains, which destroys the phase sensitivity in this region.…”

Section: Single Photon In the First Schmidt Modementioning

confidence: 78%

“…The phase sensitivity of this class of interferometers has been investigated for spectrally single-mode sources [11][12][13], including gain-unbalanced [14,15] and fully quantum three-mode [16] configurations, as well as configurations with different input states, such as coherent light [17], squeezed states [18] or a mixture of both [19,20]. These studies have shown that it is generally possible to overcome the shot noise limit and even reach the Heisenberg limit.…”

Section: Introductionmentioning

confidence: 99%

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Spectrally multimode integrated SU(1,1) interferometer

Ferreri,

Santandrea,

Stefszky

et al. 2020

Preprint

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Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interferometers have been successfully realized in bulk and fiber-based configurations. However, rapidly developing integrated technologies provide higher efficiencies, smaller footprints, and pave the way to quantum-enhanced on-chip interferometry. In this work, we theoretically demonstrate an integrated architecture of the multimode SU(1,1) interferometer. The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. We show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit. In addition, we discuss the fundamental difference between single-mode and highly multimode SU(1,1) interferometers in the properties of phase sensitivity and its limits. Finally, we explore how to improve the phase sensitivity by filtering the output radiation and using different seeding states in different modes with various detection strategies.

show abstract

Section: Single Photon In the First Schmidt Modementioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Spectrally multimode integrated SU(1,1) interferometer

Ferreri,

Santandrea,

Stefszky

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…The phase sensitivity of this class of interferometers has been investigated for spectrally single-mode sources [12,13,14], including gainunbalanced [15,16] and fully quantum threemode [17] configurations, as well as configurations with different input states, such as coherent light [18], squeezed states [19], a mixture of coherent and squeezing states [20,21,22] and a mixture of thermal and squeezed states [23]. These studies have shown that it is generally possible to overcome the shot noise limit and even reach the Heisenberg limit.…”

Section: Introductionmentioning

confidence: 99%

Spectrally multimode integrated SU(1,1) interferometer

Ferreri

Santandrea

Stefszky

et al. 2021

Quantum

View full text Add to dashboard Cite

Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interferometers have been successfully realized in bulk and fiber-based configurations. However, rapidly developing integrated technologies provide higher efficiencies, smaller footprints, and pave the way to quantum-enhanced on-chip interferometry. In this work, we theoretically realised an integrated architecture of the multimode SU(1,1) interferometer which can be applied to various integrated platforms. The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. Based on the potassium titanyl phosphate (KTP) platform, we show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit. In addition, we discuss the fundamental difference between single-mode and highly multimode SU(1,1) interferometers in the properties of phase sensitivity and its limits. Finally, we explore how to improve the phase sensitivity by filtering the output radiation and using different seeding states in different modes with various detection strategies.

show abstract

“…Here we focus on a class of quantum spectroscopy measurements of the multimode correlated squeezed light generated by four-wave mixing (FWM) (4,(22)(23)(24)(25)(26)(27). Squeezed light can be broadly defined as a state of light whose quadrature amplitudes of the electric and magnetic fields are squeezed, that is, whose quantum uncertainty in one quadrature is smaller than that of a coherent state, typical for lasers.…”

mentioning

confidence: 99%

Multidimensional four-wave mixing signals detected by quantum squeezed light

Dorfman

Liu

Lou

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

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Four-wave mixing (FWM) of optical fields has been extensively used in quantum information processing, sensing, and memories. It also forms a basis for nonlinear spectroscopies such as transient grating, stimulated Raman, and photon echo where phase matching is used to select desired components of the third-order response of matter. Here we report an experimental study of the two-dimensional quantum noise intensity difference spectra of a pair of squeezed beams generated by FWM in hot Rb vapor. The measurement reveals details of the χ(3) susceptibility dressed by the strong pump field which induces an AC Stark shift, with higher spectral resolution compared to classical measurements of probe and conjugate beam intensities. We demonstrate how quantum correlations of squeezed light can be utilized as a spectroscopic tool which unlike their classical counterparts are robust to external noise.

show abstract

Quantum Enhancement of Phase Sensitivity for the Bright-Seeded SU(1,1) Interferometer with Direct Intensity Detection

Cited by 47 publications

References 39 publications

Spectrally multimode integrated SU(1,1) interferometer

Spectrally multimode integrated SU(1,1) interferometer

Spectrally multimode integrated SU(1,1) interferometer

Multidimensional four-wave mixing signals detected by quantum squeezed light

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