quantum architectures

Roadmap for 1000 Qubits Fault-tolerant Quantum Computers

How many qubits are needed to out-perform conventional computers, how to protect a quantum computer from the effects of decoherence and how to design more than 1000 qubits fault-tolerant large scale quantum computers, these are the three basic questions we want to deal in this article.  Qubit technologies, qubit quality, qubit count, qubit connectivity and qubit architectures are the five key areas of quantum computing are discussed.

Roadmap for 1000 Qubits Fault-tolerant Quantum Computers

Earlier we have discussed 7 Core Qubit Technologies for Quantum Computing, 7 Key Requirements for Quantum Computing.  Spin-orbit Coupling Qubits for Quantum Computing and AIQuantum Computing Algorithms for Artificial IntelligenceQuantum Computing and Artificial Intelligence , Quantum Computing with Many World Interpretation Scopes and Challenges and Quantum Computer with Superconductivity at Room Temperature. Here, we will focus on practical issues related to designing large-scale quantum computers. 

Instead of running on zeros and ones, quantum computers run on an infinite number of states between zero and one. Instead of performing one calculation before moving on to the next, quantum computers can manage multiple processes all simultaneously. 

Unlike binary bits of information in ordinary computers, “qubits” consist of quantum particles that have some probability of being in each of two states, represent as |0⟩ and |1⟩, simultaneously. When qubits interact, their possible states become interdependent (entangled), each one’s chances of |0⟩ and |1⟩ hinging on those of the other. Moreover, quantum information does not have to be encoded into binary bits, it could also be encoded into continuous observables bits (qubits). 

The speed requirements for various applications grows with the complexity of the problems and the speed advantage of quantum computers are enormous compare to classical computers.  The key to quantum computation speed is that every additional qubit doubles the potential computing power of a quantum machine. 

The objective of 1000 qubits fault-tolerant quantum computing is to compute accurately even when gates have a high probability of error each time they are used. Theoretically, accurate quantum computing is possible with error probabilities above 3% per gate, which is significantly high. The resources required for quantum computing depends on the error probabilities of the gates. It is possible to implement non-trivial quantum computations at error probabilities as high as 1% per gate.Read More »Roadmap for 1000 Qubits Fault-tolerant Quantum Computers

Quantum Computing with Many World Interpretation Scopes and Challenges

Quantum Computing with Many World Interpretation Scopes and Challenges

Many scientist believe that Many World Interpretation (MWI) of quantum mechanics is self-evidently absurd for quantum computing. However, recently, there are many groups of scientist increasingly believing that MWI has the real future in quantum computing, because MWI can provide true quantum parallelism.  Here, I briefly discuss the scopes and challenges of MWI for future quantum computing for exploration into the deeper aspects of qubits and quantum computing with MWI. 

The heart of Copenhagen interpretation based quantum computing is wave function collapse. However, the Copenhagen interpretation fails to specify precisely where and how the collapses occurs and is therefore an imprecise theory. Moreover, the exact collapse mechanism is not scientifically well defined. But the beauty of Copenhagen interpretation is that “it works” and it makes no unnecessary assumptions. According to the Copenhagen interpretation there is no “game” only the result is real – the physical reality is a result of the collapse of the wave function as a “local” manifestation of the non-local wave-function. However, wave function collapse is widely regarded as artificial and adhoc.

On the other hand, MWI removed the wave function collapse theory and focused on quantum parallelism thesis (QPT). It states that none of the quantum states vanishes at all, except to our perception. It says, in essence, let’s just do away with wave function collapse altogether. The entire universe (all the universes together) is described by a gigantic wave function that contains within it all possible realities. This wave function is known as “universal wave function”. The universe is a single reality. It hypothesized that, at the quantum level, whenever the universe is confronted with a choice of paths, reality splits into branches and both choices or paths happen simultaneously.

Quantum Computing with Many World Interpretation

This tutorial is for the researchers, volunteers and students of the Compassionate AI Lab for understanding the deeper aspects of quantum computing for implementing large-scale compassionate artificial intelligence projects. 

Read More »Quantum Computing with Many World Interpretation Scopes and Challenges

Spin-orbit Coupling Qubits for Quantum Computing and AI

Spin-orbit Coupling Qubits for Quantum Computing and AI

Here, Dr. Amit Ray discusses the power, scope, and challenges of Spin-orbit Coupling Qubits for Quantum Computing with Artificial Intelligence in details. Quantum computing for artificial intelligence is one of the key research project of Compassionate AI Lab. We summarize here some of the recent developments on qubits and spin–orbit coupling  for quantum computing. 

In digital computing, information is processed as ones and zeros, binary digits (or bits). The analogue to these in quantum computing are known as qubits. The qubits are implemented in nanoscale dimensions, such as spintronic, single-electron devices and ultra-cold gas of Bose-Einstein condensate state devices. Manipulation and measurement of the dynamics of the quantum states before decoherence are the primary characteristic of quantum computing. 


Quantum Computing with AI

Involving electron spin  in designing electronic devices with new functionalities, and achieving quantum computing with electron spins is among the most ambitious goals of  compassionate artificial superintelligence – AI 5.0.  Utilizing quantum effects like quantum superposition, entanglement, and quantum tunneling for computation is becoming an emerging research field of quantum computing based artificial intelligence. 

Read More »Spin-orbit Coupling Qubits for Quantum Computing and AI