Abstract: We report a new experimental result to generate open-loop correlation nonclassical state of the light by means of the technique of quantum information copy in a series-coupled LEDs system at room temperature. Quantum fluctuation of the intensity difference between open-loop twin beam of the light has been squeezed below the standard quantum limit of the light by 9.5 dB (88.8%) at the frequency of 2 MHz, the corresponding squeezed bandwidth is broader than 1 - 50 MHz.!8
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