Developed transistor for a quantum computer
A team of researchers at the University of Maryland demonstrated the first single-photon transistor based on semiconductor chips. It is capable of processing 10 billion of photonic qubits per second, and its size a million times smaller than a grain of salt.
Transistors marshrutizator electronic signals and are one of the basic elements of any digital device. Quantum computers also need them, but because of the physical characteristics of qubits, existing processors may not apply. Another difficulty is the necessity of interaction of photons with each other, which usually happens by itself.
Scientists have been able to overcome these problems by creating a semiconductor chip with a plurality of holes similar to honeycomb. The light passing through it reflects and falls on the located in the center of a tiny crystal, amplifying the intensity of the beam. Crystal is able to store information about 30 photons falling on the device. However, he can also provide interaction in which photons influence each other.
During testing, chip missed pulses only when the first photon, “opening the way” to others. If, however, it was not of photons, the crystal blocks all subsequent ones. This principle of operation is similar to a normal transistor, but instead of electric toga uses beams of light.
The team claims that by using the engineering improvement, many such quantum transistors can be combined into a single system. In the future they hope to create a powerful and compact quantum computers.
Modern technology surprises almost every day. One of the striking developments is paint SolCold cooling under the action of sunlight.