Polarization-based truncated SU(1,1) interferometer based on four-wave mixing in Rb vapor

Prajapati, Nikunjkumar; Novikova, Irina

doi:10.1364/ol.44.005921

Cited by 21 publications

(11 citation statements)

References 26 publications

(35 reference statements)

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“…A growing literature now describes the sensitivity of nonlinear [31,32,35] and truncated nonlinear interferometers. [36][37][38] Here, we define the fundamental limits of magneto-optical spectroscopies based on Faraday and Kerr rotation of light with classical readout fields, and we show how two-mode squeezed light can be used to obtain quantum enhanced sensitivity beyond classical limits. In a phase sensing configuration, the device corresponds to a truncated nonlinear interferometer.…”

Section: Introductionmentioning

confidence: 99%

Magneto‐Optical Sensing Beyond the Shot Noise Limit

et al. 2021

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Magneto-optical sensors including spin noise spectroscopies and magneto-optical Kerr effect microscopies are now ubiquitous tools for materials characterization that can provide new understanding of spin dynamics, hyperfine interactions, spin-orbit interactions, and charge-carrier g-factors. Both interferometric and intensity-difference measurements can provide photon-shot-noise-limited sensitivity, but further improvements in sensitivity with classical resources require either increased laser power that can induce unwanted heating and electronic perturbations or increased measurement times that can obscure out-of-equilibrium dynamics and slow experimental throughput. Proof-of-principle measurements have already demonstrated quantum enhanced spin noise measurements with a squeezed readout field that are likely to be critical to the nonperturbative characterization of spin excitations in quantum materials that emerge at low temperatures. Here, a truncated nonlinear interferometric readout for low-temperature magneto-optical Kerr effect and related magneto-optical microscopies that is accessible with today's quantum optical resources is proposed. 10 nrad∕ √Hz sensitivity is achievable with optical power as small as 1 µW. As a result, measurements may be performed at temperatures as low as 83 mK in commercially available dilution refrigerators. This combination of high sensitivity and low operating temperature is impossible to achieve with any classical measurement. The quantum advantage for the proposed measurements persists even in the limit of large loss and small squeezing parameters.

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Section: Introductionmentioning

confidence: 99%

Magneto‐Optical Sensing Beyond the Shot Noise Limit

et al. 2021

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“…Because the shot noise level is defined by the total power at the detector, including local oscillator power, unwanted photomodification and heating of the sample can be minimized without sacrificing the quantum advantage. A growing literature now describes the sensitivity of nonlinear 29,30,33 and truncated nonlinear interferometers [34][35][36] . Here, we define the fundamental limits of magneto-optical spectroscopies based on Faraday and Kerr rotation of light with classical readout fields, and we show how two-mode squeezed light can be used to obtain quantum enhanced sensitivity beyond classical limits.…”

Section: Introductionmentioning

confidence: 99%

Magneto Optical Sensing beyond the Shot Noise Limit

Pai,

Marvinney,

Hua

et al. 2021

Preprint

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Magneto-optical sensors including spin noise spectroscopies and magneto-optical Kerr effect microscopies are now ubiquitous tools for materials characterization that can provide new understanding of spin dynamics, hyperfine interactions, spin-orbit interactions, and charge-carrier g-factors. Both interferometric and intensity-difference measurements can provide photon shot-noise limited sensitivity, but further improvements in sensitivity with classical resources require either increased laser power that can induce unwanted heating and electronic perturbations or increased measurement times that can obscure out-of-equilibrium dynamics and radically slow experimental throughput. Proof-ofprinciple measurements have already demonstrated quantum enhanced spin noise measurements with a squeezed readout field that are likely to be critical to the non-perturbative characterization of spin excitations in quantum materials that emerge at low temperatures. Here, we propose a truncated nonlinear interferometric readout for low-temperature magneto-optical Kerr effect measurements that is accessible with today's quantum optical resources. We show that 10 nrad/ √ Hz sensitivity is achievable with optical power as small as 1 µW such that a realistic T = 83 mK can be maintained in commercially available dilution refrigerators. The quantum advantage for the proposed measurements persists even in the limit of large loss and small squeezing parameters.

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“…As for the lower frequencies, we believe the dominating noise is 1/f laser noise since it is present in probe laser noise. While outside the scope of this study, there have been several studies that have demonstrated cancellation of 1/f noise down to frequencies less than 200 Hz and reach the shot noise floor 34,35 . The shot noise marks a stark quantum limit for improvement of this type of sensor.…”

mentioning

confidence: 99%

Enhancement of electromagnetically induced transparency based Rydberg-atom electrometry through population repumping

Prajapati,

Robinson,

Berweger

et al. 2021

Preprint

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We demonstrate improved sensitivity of Rydberg electrometry based on electromagnetically induced transparency (EIT) with a ground state repumping laser. Though there are many factors that limit the sensitivity of radio frequency field measurements, we show that repumping can enhance the interaction strength while avoiding additional Doppler or power broadening. Through this method, we nearly double the EIT amplitude without an increase in the width of the peak. A similar increase in amplitude without the repumping field is not possible through simple optimization.We also establish that one of the key limits to detection is the photon shot noise of the probe laser. We show an improvement on the sensitivity of the device by a factor of nearly 2 in the presence of the repump field.

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Polarization-based truncated SU(1,1) interferometer based on four-wave mixing in Rb vapor

Cited by 21 publications

References 26 publications

Magneto‐Optical Sensing Beyond the Shot Noise Limit

Magneto‐Optical Sensing Beyond the Shot Noise Limit

Magneto Optical Sensing beyond the Shot Noise Limit

Enhancement of electromagnetically induced transparency based Rydberg-atom electrometry through population repumping

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