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咨询内容：Pleased to meet you http://levitra.in.net/ levitra 20 In the experiment, the first pump is tuned below the circuit's resonance, transferring the thermal state of the oscillator into a pulse that removes the thermal energy from the drum, cooling it to near its ground state. The second pump tone is tuned above the circuit's resonance and this creates a pulse that is entangled with the oscillator. The third and final pump is, once more, tuned below resonance and it converts the state of the oscillator into a third pulse. During this process, a train of three pulses emerges from the circuit. The first contains the thermal state of the oscillator but it is the second and third pulses that are of interest to the researchers. "We show that the second and third pulses are entangled and because we know that the third pulse contains the state of the oscillator immediately after the entanglement was generated, the oscillator must have been entangled with the second pulse," says Lehnert.