In this article, a new approach for the efficient design of quantum-dot cellular automata (QCA) circuits is introduced. The main advantages of the proposed idea are the reduced number of QCA cells as well as increased speed, reduced power dissipation and improved cell area. In many cases, one needs to double the effect of a particular inter median signal. State-of-the-art designs utilize a kind...

A fundamental result in modern quantum chaos theory is the Maldacena-Shenker-Stanford upper bound on growth of out-of-time-order correlators, whose infinite-temperature limit related to operator-space entanglement entropy evolution operator. Here we show that, for one-dimensional cellular automata (QCA), there exists a lower quantified by such entropy. This equal twice index QCA, which topologi...

Since the scaling of transistors is growing rapidly, need for an efficient alternative Complementary Metal-Oxide-Semiconductor (CMOS) technology to obtain further and extra processes in circuits has been known as main problem. Over last decade, Quantum-dot Cellular Automata (QCA) recognized a suitable replacement CMOS due its excellent potential developing designs with low-power consumption, hi...

Rapid progress in the field of nanotechnology includes using quantum dot-cellular automata (QCA) as a replacement for conventional transistor-based complementary metal oxide semiconductor (CMOS) circuits construction nano-circuits. Due to ultra low thermal dissipation, rapid clocking, and extremely high density, QCA is rapidly growing nanotechnological inhibit effect transistor (FET)-based circ...

A number of physical systems that are considered for the realization of a universal quantum computer, such as optical lattices 1 or arrays of microlenses 2 , possess a translation symmetry in the arrangement of qubits and their mutual interaction. Quantum cellular automata QCA represent a suitable framework to explore the computational power of such physical systems, because they respect this s...

While the end of Moore’s law has been predicted for many years, it appears that transistors may finally hit physical scaling limits and packing densities in the next ten to twenty years. This possibility has led to the development of many nanoelectronic devices such as carbon nanotubes, single electron transistors, molecular transistors, and quantum-dot cellular automata (QCA) among others. One...

Molecular-based quantum cellular automata (m-QCA), as an extension of quantum-dot QCAs, offer a novel alternative in which binary information can be encoded in the molecular charge configuration of a cell and propagated via nearest-neighbor Coulombic cell-cell interactions. Appropriate functionality of m-QCAs involves a complex relationship between quantum mechanical effects, such as electron t...

The use of quantum-dots is a promising emerging technology for implementing digital systems at the nano-scale level. Recently studied computational paradigms for quantum-dot technology include the use of locally connected quantum-dot cellular automata (QCA). This technique is based on the interaction of electrons within quantum dots that take advantage of quantum phenomena; the same phenomena t...

The authors present a novel memory architecture for quantum-dot cellular automata (QCA). The proposed architecture combines the advantage of reduced area of a serial memory with the reduced latency in the read operation of a parallel memory, hence its name is ‘hybrid’. This hybrid architecture utilises a novel arrangement in the addressing circuitry of the QCA loop for implementing the memory-i...

Quantum-dot cellular automata ~QCA! may provide a novel way to bypass the transistor paradigm to form molecular-scale computing elements. In the QCA paradigm information is represented by the charge configuration of a QCA cell. We develop a theoretical approach, based on the density matrix formalism, which permits examination of energy flow in QCA devices. Using a simple two-state model to desc...