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Saturday, 5 March 2011

Concepts Of Quantum Computing

Quantum computing is based upon physics completely different from that observed in the electronic devices of today. In today's computing paradigm, a transistor can be in only one of two states called bits - 0 or 1, on or off. But in the realm of quantum computing a transistor can be in a state of 0, 1, or a "superposition" of 0 or 1. And there can be many superpositions. These quantum bits are called "qubits." Physically, qubits are encoded in atoms, photons, ions, or electrons.
Whereas a standard transistor can perform only one operation at a time, a qubit can perform many simultaneously. Therefore a quantum computer containing the same number of transistors as an ordinary computer of today can be a million times faster. A 30-qubit quantum computer could perform as many as 10 teraflops - 10 trillion floating-point operations per second! Today's desktop computers perform gigaflops - billions of operations per second.
So obviously, that's where the interest in quantum computing comes from - speed. A personal computer a million times faster than the one currently on your desk boggles the mind. After all, how fast can you type? But there are applications that would benefit from that type of speed, such as image recognition, cryptography, and other problems that require enormous computing power. Personally, I'd be happy with a computer that's ready to go as soon as you turn it on. I don't anticipate being able to type a million times faster than I already do.

One problem with quantum computing is that if you observe the quantum state of a qubit, it changes. So scientists must devise an indirect method of determining the state of a qubit. To do this, they are trying to take advantage of another quantum property called "entanglement." At the quantum level, if you apply a force to two particles they become "entangled;" a change in the state of one particle is instantly reflected in the other particle's change to the opposite state. So by observing the state of the second particle, physicists hope to determine the state of the first.

Wednesday, 2 March 2011

Know something about WIMAX technology

WiMAX Technology is also one of the emerging wireless technology that provide us high speed mobile data and telecommunication services. WiMAX stands for Worldwide Interoperability for Microwave Access and it is based on IEEE 802.16 standards.In this technological world, we have so many technologies that help us in every aspect of our daily life such as transportation, communication etc. Wimax Technology works same as Wi-Fi does but it is more improved and efficient then WiFi and it can route data to Wi-Fi that is Wi-Fi devices can take advantage of WiMAX connection. WiMAX technology providess higher speed connection up to 70 Mbps over the area of 30 miles. There is no need for line of sight connection between subscriber terminals and the base station in WiMAX technology and it can support hundreds if not thousands of subscribers from a single base station. It is also specified in 802.16 standards that it will supports low latency applications such as voice, video, and Internet access at the same time. To Read about What is WiMAX technology