HKUST scholars assisting to make quantum computers a truth
A joint research group comprising of students from the Hong Kong University of Science and Technology (HKUST) and the South China Normal University (SCNU) set a brand new document of photonic quantum reminiscence performance, pushing quantum computation a step towards truth.
Like reminiscences in computers, quantum memories are crucial components for quantum computers – a brand new era of facts processors that obey quantum mechanics legal guidelines and might conquer the restrictions of classical computer systems.
They may also push boundaries of fundamental technology and help create new pills, explain cosmological mysteries, or decorate the accuracy of forecasts and optimization plans with their amazing computational electricity. Quantum computer systems are anticipated to be a good deal faster and more effective than their traditional opposite numbers as statistics is calculated in qubits – which unlike the older units (bits) used in classical computer systems, can constitute each 0 and 1 on the equal time.
Photonic quantum reminiscences allow for the garage and retrieval of flying unmarried-photon quantum states. However, manufacturing of such enormously-efficient quantum reminiscences remains a primary undertaking as it requires a perfectly matched the photon-count quantum interface. Meanwhile, the energy of a unmarried photon is simply too vulnerable and may be without difficulty lost into the noisy sea of stray mild heritage. For a long term, those issues suppressed quantum memory efficiencies to below 50% – a threshold fee essential for sensible applications.
Now for the primary time in records, a joint studies crew led by a professor from the Department of Physics and William Mong Institute of Nano Science and Technology at HKUST; a senior professor from SCNU who graduated his PhD examine at HKUST; any other professor from SCNU and a former postdoctoral fellow at HKUST; as well as some other professor from SCNU and Nanjing University, has found a way to enhance the performance of photonic quantum recollections to over 85% with a fidelity of over 99%.
The group created such a quantum reminiscence by way of trapping billions of rubidium atoms into a hair-like tiny area – those atoms are cooled down to almost absolute zero temperature (approximately 0.00001 K) using lasers and magnetic discipline. The team also observed a clever manner to differentiate the unmarried photon from the noisy heritage light sea.
The locating introduced the dream of a ‘widespread’ quantum pc a step in the direction of reality. Such quantum recollections can also be used as repeaters in a quantum network, laying the inspiration for a new technology of quantum-primarily based net.
It turned into referred to this work, that the crew code a flying qubit onto the polarization of a single photon and save it into the laser-cooled atoms. Although the quantum memory confirmed in this work is handiest for one qubit operation, it opens the possibility for rising quantum era and engineering within the destiny.
The locating was lately posted as a cowl story of the authoritative magazine – the modern of a chain of studies from one of the lead professor’s laboratories on a quantum reminiscence, which first began in 2011.