In particular, there are hypotheses about the participation of quantum effects in human cognitive processes, which encourages scientists to discover new ways of memory with the help of quantum phenomena.

More about development

An international group of researchers from Germany, China and Chile presented the long-discussed version of the memcapacitor, proposed along with memristors and meminductors more than half a century ago.

In fact, any material with nonlinear properties, characterized by a hysteresis loop, can serve as memory for electronic devices. Researchers are trying to establish a connection between electronic signals and quantum effects using memcapacitors.

Memcapacitors allow information to be stored by coupling voltage with load, similar to how memristors combine current and voltage. The challenge is to couple these mechanisms with quantum states to enable nondestructive reading and writing of quantum memory cells, thus facilitating the observation of quantum effects such as entanglement in a macrosystem.

key to success

Microwave radiation is becoming an important tool for manipulating elements of quantum memory. The memory element consists of two interconnected oscillatory circuits, one of which acts as the primary circuit and the other is an auxiliary circuit added to stabilize the operation of the primary circuit using feedback.

A SQUID element or a superconducting magnetometer (interferometer) interacting with microwave radiation is integrated into the primary circuit. The radiation intensity, based on measurements of the auxiliary circuit, determines the state of the memory cell.

Thanks to feedback mechanisms, the presented element exhibits stable operation accompanied by quantum effects, especially entanglement, which is also confirmed by experimental data.

Schematic diagram of superconducting microwave mem capacitor / Photo Contact Materials

Researchers explain:

This device operates with classical input on one resonator and synchronous readout response on the other and serves as a key component for building arrays of microwave quantum memory devices. We observed that the bidirectional circuit maintains memory properties and exhibits entanglement and quantum correlations. Our results pave the way for the experimental realization of superconducting quantum devices with high memory capacity and memory arrays for neuromorphic quantum computing.