Chennai: Researchers have made a significant improvement on previous designs in photonic systems that could make quantum computing a viable reality in the near future.
Scientists at CRANN and the School of Physics at Trinity College Dublin have created a new device that will emit single particles of light, or photons, from quantum dots that are the key to practical quantum computers, quantum communications, and other quantum devices.
The device allows for controllable, directional emission of single photons and which produces entangled states of pairs of quantum dots.
The promise of quantum computers leverages the properties of quantum bits or qubits to execute computations. Quantum bit is the basic unit of quantum information—the quantum version of the classical binary bit physically realised with a two-state device.
Current computers process and store information in bits of either 0s or 1s whereas qubits can be 0 and 1 simultaneously. That means quantum computers will have much greater computational powers over and above classical computers.
The Trinity team, who explored different options and designs, have published their studies in the high-profile journal Nano Letters.
The team looked at utilising photonic systems, making use of quantum properties of light at the nanoscale, as qubits.