British scientists have developed a quantum (spin) capacitor that is capable of generating and maintaining the spin state of electrons for about two hours. This unique discovery in the future will allow the creation of electronics with even lower energy consumption and heat generation.
As you all know perfectly, a capacitor in electronics is a charge storage device. So the quantum (spin) capacitor functions according to a similar principle.
But he is still able to accumulate the spin state of a group of electrons. Simply put, it fixes the spin position of each electron.
It is this unusual ability that allows you to start developing completely new information storage devices. Moreover, the created devices will be significantly smaller than existing ones.
And according to preliminary calculations, a spin capacitor with a side of 2.5 cm will be quite capable of accommodating 100 TB of various data.
Why is this development needed?
In modern electronics, for example, in computers or cell phones, up to 70% of energy is simply wasted – for heating. This is extremely inefficient and imposes significant restrictions on technology.
But thanks to quantum effects and using other materials, such large losses can be avoided.
How does a quantum capacitor
In existing hard drives, information is stored in the form of a binary code (zero and one), which is recorded by changing the polarity of magnetization on certain areas of the hard drive.
In the case of quantum technologies, spin capacitors are capable of recording and reading information flow, which is encoded in the spin state of electrons. In this case, the reading can be carried out using light or an electrical impulse.
What a quantum capacitor is made of
A scientific team from the University of Leeds has created a quantum (spin) capacitor from a special kind of carbon – buckminsterfullerene, as well as manganese oxide and a magnetic cobalt electrode.
In this case, the decay time of the fixed spin state of the electrons was increased to almost two hours due to the interaction of carbon in fullerene and metal oxide under the direct influence of a magnetic electrode.
As stated by M. Rogers, this small discovery can fundamentally change all the memory electronics. And, quite possibly, in the foreseeable future, instead of the usual hard drives, quantum capacitors will be used. Well, wait and see.