Category Archives: The More You Know

Brief definition of terms which are of interest to those beginning to study (or currently studying) Quantum Information and Quantum Computation.

The More You Know: Quantum Simulator

A Quantum Simulator is a controllable quantum mechanical system than can be used to study more complex quantum system that cannot be directly studied nor simulated by any classical computer. One of the most important consequences of the existence of … Continue reading

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The More You Know: Quantum Circuit

Quantum Circuits are used to visualize a prescription of quantum gates acting on a quantum state. They describe the changes of the quantum data as it undergoes successive discrete operations. The data in a Quantum Circuit is usually encoded in a -qubit state (other Quantum Circuit … Continue reading

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The More You Know: Bell States/EPR Pairs

Bell States (named after John S. Bell) or EPR pairs (after Einsetin, Podolski and Rosen Paradox) are the maximally entangled quantum states of a two qubit system (i.e. a quantum mechanical system composed of two interacting two-level subsystems). In the computational basis  the four … Continue reading

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The More You Know: Bloch Sphere

The Bloch Sphere is a useful geometrical representation of the state of a Qubit or any other two level quantum system. As discussed in this article an arbitrary pure state of a Qubit can be expressed in the computational basis as … Continue reading

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The More You Know: Qubit

A Qubit, or quantum bit is the fundamental unit of quantum information, it is a mathematical concept satisfying particular properties. The Qubit is the quantum counterpart of the classical bit. A classical bit can be in one of two different states: 0 … Continue reading

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The More You Know: Loss-DiVicenzo Quantum Computer

The Loss-DiVicenzo Quantum Computer is a hardware proposal for the implementation of a scalable spin-based quantum computer in a coupled quantum dot system. The qubits of their quantum computer are realized as the two spin states of a confined electron. In … Continue reading

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The More You Know: EPR Paradox

The EPR Paradox is a thought experiment published in a paper in May 1935 by Albert Einstein and two of his postdoctoral research associates Boris Podolsky and Nathan Rosen that was meant to prove that Quantum Mechanics showed internal contradictions in it’s … Continue reading

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The More You Know: DiVicenzo Criteria

The DiVicenzo Criteria for implementing a quantum computer are a set of requirements that any candidate (circuit model) quantum computer must satisfy. These five requirements, plus two relating to the communication of quantum information were formulated by David P. DiVincenzo in 2008 and are … Continue reading

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The More You Know: Boson Sampling

Boson Sampling is a model for non-universal quantum computation which performs specific tasks that are thought to be hard to efficiently perform on a classical computer. By exploiting the processing power of quantum mechanics, the output photon number distribution of … Continue reading

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New Article Series: “The More You Know”

In the spirit of writing a “faq / Dictionary of Quantum Information and Quantum Computation” for the blog I’m starting a new article series called: The More You Know. In each article I’m gonna give a brief definition of terms which … Continue reading

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