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We report a proof-of-principle experiment on distant clock synchronization. Besides the achievement of picosecond resolution at 3 kilometer distance, this experiment demonstrated a novel concept for high accuracy non-local timing and positioning based on the quantum feature of entangled states. Accurate timing and positioning metrological measurements are… (More)

- Yanhua Shih
- 2009

One of the most surprising consequences of quantum mechanics is the nonlocal correlation of a multi-particle system observable in joint-detection of distant particle-detectors. Ghost imaging is one of such phenomena. Taking a photograph of an object, traditionally, we need to face a camera to the object. But with ghost imaging, we can image the object by… (More)

- Yanhua Shih
- 2007

One of the most surprising consequences of quantum mechanics is the entan-glement of two or more distant particles. Although questions regarding fundamental issues of quantum theory still exist, quantum entanglement has started to play important roles in practical engineering applications. Quantum imaging is one of these exciting areas. Quantum imaging has… (More)

By utilizing the frequency anticorrelation of two-photon states produced via spontaneous parametric down conversion (SPDC), the working principle of a novel remote spectrometer is demonstrated. With the help of a local scanning monochromator, the spectral transmission function of an optical element (or atmosphere) at remote locations can be characterized… (More)

We introduce a new factorization algorithm, based on the analogue determination of the periodicity of a single generalized continuous truncated exponential sum (CTES) interferogram. We demonstrate that this algorithm allows, in principle, to factorize arbitrary numbers exploiting a remarking rescaling property of the recorded CTES interference pattern. Such… (More)

We report on a delayed-choice quantum eraser experiment based on a two-photon imaging scheme using entangled photon pairs. After the detection of a photon which passed through a double-slit, a random delayed choice is made to erase or not erase the which-path information by the measurement of its distant entangled twin; the particle-like and wave-like… (More)

We report a recent experimental simulation of a controlled-NOT gate operation based on polarization correlation measurements of thermal fields in photon-number fluctuations. The interference between pairs of correlated paths at the very heart of these experiments has the potential for the simulation of correlations between a larger number of qubits.

We report an experimental demonstration of a nonclassical imaging mechanism with super-resolving power beyond the Rayleigh limit. When the classical image is completely blurred out due to the use of a small imaging lens, by taking advantage of the intensity fluctuation correlation of thermal light, the demonstrated camera recovered the image of the… (More)

This article reports first experimental demonstration on two-photon ghost imaging using the sun as a light source. This experimental results raises a fundamentally important question about whether the nonlocal ghost-imaging effect of classical thermal light is caused by quantum-mechanical two-photon interference. Ghost imaging using the Sun as a light… (More)