[ad_1]
Physical formed qubits – quantum bits – from atoms graphene for the first time, according to research published in The Nature Nanotechnology.
The quantum computing applications are currently still some handwavy, but all fail to create & # 39; qubits.
Computers track traditional performing operations using transistors and capacitors, which bits of data can be stored in two states: 0 or 1. Quantum computers, however, use qubits, all interact with each other and may exist in a variety of states, superpożizzjoni t & # 39; 0 and 1. the more quibits, more are possible states that a system has.
Qubits are fiddly, and it is difficult to keep all f & # 39; quantum assumption. They must be insulated carefully, because even small changes in temperature can hamper the qubits states. The team led by researchers from the Institute of Technology & # 39; Massachusetts (MIT) bessaħ b & # 39; focus quantum system consisting of two qubits 10 millikelvin (-273.14 ° C), a little smidgen & # 39; above absolute zero.
The qubits were composed loops & # 39; superconductors based on graphene. graffen of paper, arranging & # 39; lattice & # 39; carbon atoms, was dried between two layers of & # 39; hexagonal boron nitrate. The two qubits are connected using the & # 39; aluminum electrode, and operate as transistors.
The application & # 39; voltage to the system creates lines & # 39; current drive tiny magnetic fields that cause the electrons in graphene jump between layers & # 39; boron nitride of the superconducting, allowing the qubits to switch states between 0 and 1. The electrons are 0 in their ground state, and 1 when excited and f & # 39; assumption. The researchers managed to maintain the superconducting quibits in superpożizzjoni, a state described as "consistent coherent temporarily", around 55 nanosekonda.
"Our motivation is to use the unique features of & # 39; graphene to improve the superconducting qubits performance," said Joel I-Jan Wang, the first author of the paper and a researcher post-doctoral in electronics in -MIT.
"F & # 39; this work, we show for the first time qubit superconducting made from graphene is quantitatively consistent temporarily, a key requirement for building & # 39; circuitry & # 39; sophisticated quantities. Ours is the first device to show time & # 39; & # 39 can coherence; primary metric measure – a & # 39; qubit – that long enough for humans to control. "
Being able & # 39; control with voltage qubits help scientists increase the number that can & # 39; pushing on a single chip. Currently, 1,000 qubits may be used and the researchers hope to create systems with & # 39; most can be controlled for longer times. ®
Source link
