To characterize the noise performance of the QFC chip, the SF light, pump, and non-converted signal are separated by a longpass dichroic mirror. A 785-nm longpass filter, a 945-nm shortpass filter, an 857-nm bandpass filter with a 30-nm bandwidth, a 0.5-nm narrowband filter centered ...
The colorful bars indicate the time-energy entangled photon pairs multiplexed by 100-GHz DWDM channels. b Joint spectral amplitude of signal and idler photons. Full size image Firstly, we characterize the time-energy entanglement of the SPDC source by using a Franson-type interferometer35. For a...
The detective quantum efficiency (DQE) is widely accepted as the most relevant parameter to characterize the image quality of medical x-ray systems. In this article we describe a solid method to measure the DQE. The strength of the method lies in the fact that it is self-normalizing so meas...
different beam qualities [3]. The same concept was used by Borasi et al. for the evaluation of image quality of different digital flat panel detectors [4]. Bertolini et al. used both integrated DQE and eDQE for the comparison of performance of different digital radiography imaging systems [...
When acting as the strong optical beacon, it is possible to use this light source to characterize the space-to-ground optical channel and to commission the fine-pointing mechanism [42]. When this is completed, the light source can be adjusted to become a polarisation-encoded WCP source that ...
Since the 1980s, researchers have taken giant steps in understanding how to use quantum mechanics for solving real problems—for example, making a computer that works according to the laws of quantum mechanics. In recent decades, researchers have tried to develop a platform for quantum information...
To this end, tripartite logarithmic negativity (TLN) [32] is analogously proposed to characterize the pure quantum information that is scrambled. It is well-known that realistic quantum systems inevitably interact with their surrounding environments, resulting in decoherence and dissipation. The time ...
To characterize the performance of the whole system, we perform random quantum circuits sampling for benchmarking, up to a system size of 56 qubits and 20 cycles. The computational cost of the classical simulation of this task is estimated to be 2-3 orders of magnitu...
The "universal detector" performs a joint measurement on the system and on a suitably prepared ancilla. We characterize such universal detectors, and show how they can be obtained either via Bell measurements or via local measurements and classical communication between system and ancilla....
This is a toughy, even classical physics has not solved it in the context of chaotic systems, because whether or not we can characterize a state as "definite" depends on whether or not we can use the concept for predictions. States that can never be used for prediction, no matter how ...