[ad_1]
Australian scientists have taken another step in their approach to creating a quantum computer chip in silicon, demonstrating their ability to adjust the frequency of control of a qubit in elaborating its atomic configuration
their approach to the creation of a quantum computer chip in silicon, demonstrating the ability to adjust the frequency of control of a qubit by developing its atomic configuration. The work was published in Science Advances.
A team of researchers from the Center of Excellence for Quantum Computing and Communication Technology (CQC2T) at UNSW Sydney has successfully implemented an atomic engineering strategy to treat near-spin qubits .
The researchers constructed two qubits – an artificial molecule composed of two phosphorus atoms with a single electron, and the other a single atom of phosphorus with a single electron – and placed them at only 16 nanometers in a silicon chip
. By configuring a microwave antenna above the qubits with precision alignment, the qubits were exposed at frequencies of about 40GHz. The results showed that by changing the frequency of the signal used to control the electron spin, the single atom had a radically different control frequency compared to the electron spin in the molecule of two phosphorus atoms.
UNSW researchers collaborated closely with experts at Purdue University, who used powerful computational tools to model atomic interactions and understand how the position of atoms influences the control frequencies of each electron, even when displacing atoms of one nanometer only.
"The research confirms the ability to tune neighboring qubits into one without touching each other."
UNSW journal Scientia founded by Michelle Simmons, CQC2T director and co-author of l & # 39; section. Genetically modified phosphorus molecules with different separations between atoms within the molecule allows families to qubits with diff erent control frequencies. Each molecule can be operated individually by selecting the frequency that controls its electronic spin.
"You can tune into a particular molecule – a bit like connecting to different radio stations," says Sam Hile, co-lead author of "It creates an integrated address that will provide significant benefits for the construction of radio stations." a quantum silicon computer. "
The adjustment and individual control of qubits in a 2 qubit system is a precursor to demonstrate the entangled states that are required for a quantum computer to function and perform complex calculations.
These results show how the team – led by Professor Simmons – has relied on their unique Australian approach to creating quantum bits from precisely positioned individual atoms.
By developing the atomic placement of atoms in the qubits of the silicon chip, the molecules can be created with different resonant frequencies. es. This means that the spin control of a qubit will not affect the spin of the neighboring qubit, which will lead to fewer errors – an essential requirement for the development of a quantum computer at large scale.
"The ability to calculate the number of atoms within qubits selectively enables one qubit of another, which results in lower error rates even they are very close together, "says Professor Simmons
" These results underscore the continuing benefits of atomic qubits in silicon. "19659002] This latest advance in the control of rotation results from the recent researches of the world. team on controllable interactions between two qubits
Source link
