Due to our high repetition rate and consequently small time bins, we lose the detections that fall outside the time bins (Fig.2). Whereas further reducing the timing jitter is not simple, we could just double the multipixel detectors at Bob. The advantage would be twofold: the detection rat...
After having been stored for a specified time, the retrieved signal 2 photon was detected using another single-photon detector of the same make. The outputs from both detectors were connected to a time-to-digital converter (Fast Comtec. P7888) with 1 ns bin-width to measure the cross-...
The principle and experiment system of single-photon detector quantum efficiency measurement by correlated photons are introduced,and a set of measurement and control software for the system is established and developed. Based on Lab VIEW standard state machine,the software is consist of"laser configura...
For [Physicist John Archibald] Wheeler, this meant the universe couldn’t really exist in any physical sense—even in the past—until we measure it. And what we do in the present affects what happened in the past—in principle, all the way back to the origins of the universe. If he is...
single atom. To run a quantum computer, we need to manipulate individual qubits and perform entangling operations on pairs of qubits. Once we can perform such single-qubit and two-qubit “quantum gates” with sufficient accuracy, and measure and initialize the qubits as well, then in principle...
Waveandparticledescriptionsare“complementary”–theycanneverbothbeobservedinasingleexperiment.TheBohr-Einsteindebates InTsweroti-nsglit“iWnteelrcfheerernWce:g”detectorsdetshteropyrsotooutyrpigicnaolrwanacve–anpdhethnuosmtehneoin.terference.EachparticleMsaceinteosmhPIsCTto“gothroughbothissimnloatigsteusf...
One year later, the same group presented an advanced chip a quantum processing unit [45], that integrated all the necessary components to initialize, manipulate, and measure quantum-quart (ququart) states. It was composed of 451 photonic components, including 116 reconfigurable phase shifters, ...
If Alice performs the MEASURE operation, Bob performs the REFLECT operation, and TP performs the Bell measurement and single measurement; then, if the single particle measurement is |0〉|0〉, the attack behavior is detected with a probability of 1/4, if the single particle measurement is ...
The 800 nm wavelength of the quantum downlink allows the use of easily available Si-APDs for the OGS detectors. Moderate cooling is sufficient to reduce dark counts to negligible levels. 6 Optics and fine pointing The main challenge of CQuCoM is the transmission of single photons from an orbit...
(to my knowledge) an accurate description of what happens when we shoot baseballs at a plastic wall. However, this is not the same when we shootphotons. Amazingly, if we shoot with a "photon gun" (i.e., a laser) at a wall equipped with photon detectors through some barrier, then (...