Yi Zheng's scientific contributions
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Publications (9)
With an extremely high dimensionality, the spatial degree of freedom of entangled photons is a key tool for quantum foundation and applied quantum techniques. To fully utilize the feature, the essential task is to experimentally characterize the multiphoton spatial wave function including the entangled amplitude and phase information at different e...
As a quantum resource, quantum coherence plays an important role in modern physics. Many coherence measures and their relations with entanglement have been proposed, and the dynamics of entanglement has been experimentally studied. However, the knowledge of general results for coherence dynamics in open systems is limited. Here we propose a coheren...
The quantum wave function of multiple particles provides additional information which is inaccessible to detectors working alone. Here, we introduce the coincidence wave-front sensing (CWS) method to reconstruct the phase of the multiphoton transverse spatial wave function. The spatially resolved coincidence photon counting is involved. Numerical s...
The quantum wave function of multiple particles provides additional information which is inaccessible to detectors working alone. Here, we introduce the coincidence wavefront sensing (CWS) method to reconstruct the phase of the multiphoton transverse spatial wave function. The spatially resolved coincidence photon counting is involved. Numerical si...
As a quantum resource, quantum coherence plays an important role in modern physics. Many coherence measures and their relations with entanglement have been proposed, and the dynamics of entanglement has been experimentally studied. However, the knowledge of general results for coherence dynamics in open systems is limited. Here we propose a coheren...
The weak measurement wavefront sensor detects the phase gradient of light like the Shack-Hartmann sensor does. However, the use of one thin birefringent crystal to displace light beams results in a wavelength-dependent phase difference between the two polarization components, which limits the practical application. Using a Savart plate which consis...
The weak measurement wavefront sensor detects the phase gradient of light like the Shack–Hartmann sensor does. However, the use of one thin birefringent crystal to displace light beams results in a wavelength-dependent phase difference between the two polarization components, which limits the practical application. Use of a Savart plate, which cons...
The task of wavefront sensing is to measure the phase of the optical field. Here, we demonstrate that the widely used Shack-Hartmann wavefront sensor detects the weak value of transverse momentum, usually achieved by the method of quantum weak measurement. We extend its input states to partially coherent states and compare it with the weak measurem...
The task of wavefront sensing is to measure the phase of the optical field. Here, we demonstrate that the widely used Shack–Hartmann wavefront sensor detects the weak value of transverse momentum, usually achieved by the method of quantum weak measurement. We extend its input states to partially coherent states and compare it with the weak measurem...
Citations
... Like some shearing methods, it is an interference of the original beam with a slightly displaced one. Then, our group extended it to the multiphoton case [27], which re-quires JPD measurement of photons. However, weak measurement methods require a high signal-to-noise ratio, which is difficult for biphoton fields in experiments. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/800728515883019-1567919963813_Q64/Mu-Yang-11.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/272752212967436-1442040603923_Q64/Jin-Shi-Xu.jpg)
... Furthermore, we prove a coherence Factorization law for arbitrary d-dimensional quantum pure and mixed states under FSIO channels, which generalizes the entanglement Factorization law for bipartite pure states. It is worth noticing that our coherence Factorization law has been verified experimentally for qubits and qutrits under genuinely incoherent operations (GIOs) [46], which are a special case of FSIO channels. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/272886841737230-1442072701631_Q64/Cheng-Jie-Zhang.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/920326879842305-1596434435373_Q64/Zheng-Hao-Liu-2.jpg)
... Starting from Zernike's phase contrast microscopy [18], one type of reference-free methods is selecting a part of the unknown field as the reference, including some weak measurement methods [9,19,20]. Our group used the setup devised by Kocsis et al. [21] to obtain the phase gradient distribution [22] for phase reconstruction [23,24], and named it the weak measurement wavefront sensor [25,26]. Like some shearing methods, it is an interference of the original beam with a slightly displaced one. ...
... Starting from Zernike's phase contrast microscopy [18], one type of reference-free methods is selecting a part of the unknown field as the reference, including some weak measurement methods [9,19,20]. Our group used the setup devised by Kocsis et al. [21] to obtain the phase gradient distribution [22] for phase reconstruction [23,24], and named it the weak measurement wavefront sensor [25,26]. Like some shearing methods, it is an interference of the original beam with a slightly displaced one. ...
