# General scheme of differential imaging employing weak measurement

@article{Liu2022GeneralSO, title={General scheme of differential imaging employing weak measurement}, author={Xiong Liu and Angel T. M. Wang and Junfan Zhu and Ling Ye and Rongchun Ge and Jinglei Du and Hong Zhang and Zhiyou Zhang}, journal={Physical Review A}, year={2022} }

We propose and experimentally realize a general scheme of diﬀerential imaging employing the idea of weak measurement. We show that the weak coupling between the system of interest and a two-level ancilla can introduce a two-beam circuit after an arbitrary pre-selection of the ancilla. By choosing the post-selection orthogonal to the pre-selection measurement, an eﬀective imaging platform based on diﬀerential operations is shown achieved. Experimental results on both the Sagnac interferometer…

## References

SHOWING 1-10 OF 55 REFERENCES

### Phase estimation with weak measurement using a white light source.

- PhysicsPhysical review letters
- 2013

The sensitivity of the high precision phase estimation method is equivalent to resolving light pulses of the order of a attosecond and it is robust against chromatic dispersion.

### Ultrasensitive beam deflection measurement via interferometric weak value amplification.

- PhysicsPhysical review letters
- 2009

We report on the use of an interferometric weak value technique to amplify very small transverse deflections of an optical beam. By entangling the beam's transverse degrees of freedom with the…

### Improving the precision of optical metrology by detecting fewer photons with biased weak measurement

- PhysicsLight, science & applications
- 2021

A modified weak measurement protocol, namely, biased weak measurement significantly improves the precision of optical metrology in the presence of saturation effect and achieves precision approximately one order of magnitude better than those of previously used methods.

### Continuous phase amplification with a Sagnac interferometer

- Physics
- 2010

We describe a phase-amplification technique using a Sagnac interferometer. We monitor the relative phase between two paths of a precisely misaligned interferometer by measuring the average position…

### Observation of the Spin Hall Effect of Light via Weak Measurements

- PhysicsScience
- 2008

The spin-dependent displacement perpendicular to the refractive index gradient for photons passing through an air-glass interface is detected, indicating the universality of the effect for particles of different nature.

### Precision phase estimation based on weak-value amplification

- Physics
- 2017

In this letter, we propose a precision method for phase estimation based on the weak-value amplification (WVA) technique using a monochromatic light source. The anomalous WVA significantly suppresses…

### Direct measurement of superluminal group velocity and signal velocity in an optical fiber.

- PhysicsPhysical review letters
- 2004

The experiment shows that the group velocity can indeed exceed c in the fiber; and the first direct observation of the so-called "signal velocity," the speed at which information propagates and that cannot exceed c is reported.

### Measuring small longitudinal phase shifts: weak measurements or standard interferometry?

- PhysicsPhysical review letters
- 2010

It is shown that standard interferometry greatly outperforms weak measurements in a scenario involving a purely real weak value, but an interferometric scheme based on a purely imaginary weak value combined with a frequency-domain analysis may have the potential to outperform standardInterferometry by several orders of magnitude.

### Ultra-small time-delay estimation via a weak measurement technique with post-selection

- Physics
- 2016

Weak measurement is a novel technique for parameter estimation with higher precision. In this paper we develop a general theory for the parameter estimation based on a weak measurement technique with…

### Improving precision of Mach-Zehnder interferometer with compensation employing weak measurement

- PhysicsApplied Physics Letters
- 2019

An approach making use of the well-known weak measurement technique for control operation in order to conquer the imperfections is proposed, which can be intense with a proper weak measurement and follows a small weak value instead of the common large one.