In classical computers, a bit is either 0 or 1 at a particular time. A quantum bit can exist not only in a state corresponding to the logical state 0 or 1 as in a classical bit, but also in states corresponding to a blend or superposition of these classical states. In other words, a qubit can exist as a zero, a one, or simultaneously as both 0 and 1, with a numerical coefficient representing the probability for each state. Quantum Computers use Quantum Mechanical properties to provide an exponential speed up in time and query processing capabilities [11]. In this section, we will try to decompose basic quantum gate and simulate with using Quantum computing language (QCL). QCL is a high level, architecture independent [4] programming language for quantum computers, with a syntax derived from classical procedural languages. Keywords: Basic Quantum Gates, PMD, Quantum computing language, Quantum register, Quantum mechanic
In classical computers, a bit is either 0 or 1 at a particular time. A quantum bit can exist not only in a state corresponding to the logical state 0 or 1 as in a classical bit, but also in states corresponding to a blend or superposition of these classical states. In other words, a qubit can exist as a zero, a one, or simultaneously as both 0 and 1, with a numerical coefficient representing the probability for each state. Quantum Computers use Quantum Mechanical properties to provide an exponential speed up in time and query processing capabilities [11]. In this section, we will try to decompose basic quantum gate and simulate with using Quantum computing language (QCL). QCL is a high level, architecture independent [4] programming language for quantum computers, with a syntax derived from classical procedural languages. Keywords: Basic Quantum Gates, PMD, Quantum computing language, Quantum register, Quantum mechanic
Normal computer tends to use binary bits which are representable with 0 and 1 which 0 indicates low and 1 represents high. 0 and 1 cannot simultaneously exist in single gate in normal digital computer. But in quantum computer its different, in a quantum computer, 0 and 1 can indeed coexist at the same time within a single quantum bit or qubit, thanks to the principle of superposition in quantum mechanics. quantum computing has attracted attention as a core technology for the future generation. But as its under consistent development process it’s not fully error corrected. To achieve perfectly error-corrected quantum computers, creating a logical qubit from multiple physical qubits is essential. Here, the basic principles of qubits, as well as the status of the field.
The rapid progress of Computer Science and Engineering has been accompanied by a corresponding evaluation of computation, from classical computation to quantum computation. In classical computation, computer memory made up of bits, where each bit represents either a one or a zero. In quantum computation, there are some quantum mechanical phenomena, such as superposition and entanglement, to perform operations on data. Instead of using bits, quantum computation uses qubits (quantum bits). A single qubit can represent a one, a zero, or both at the same time, which is called superposition. Because of this ability, quantum computation can perform many tasks simultaneously, faster than classical computing.
Behold your computer. Your computer represents the culmination of years of technological advancements beginning with the early ideas of Charles Babbage (1791-1871) and eventual creation of the first computer by German engineer Konrad Zuse in 1941. Surprisingly however, the high speed modern computer sitting in front of you is fundamentally no different from its gargantuan 30 ton ancestors, which were equipped with some 18000 vacuum tubes and 500 miles of wiring! Although computers have become more compact and considerably faster in performing their task, the task remains the same: to manipulate and interpret an encoding of binary bits into a useful computational result. A bit is a fundamental unit of information, classically represented as a 0 or 1 in your digital computer. Each classical bit is physically realized through a macroscopic physical system, such as the magnetization on a hard disk or the charge on a capacitor. A document, for example, comprised of n-characters stored on the hard drive of a typical computer is accordingly described by a string of 8n zeros and ones. Herein lies a key difference between your classical computer and a quantum computer. Where a classical computer obeys the well understood laws of classical physics, a quantum computer is a device that harnesses physical phenomenon unique to quantum mechanics (especially quantum interference) to realize a fundamentally new mode of information processing. In a quantum computer, the fundamental unit of information (called a quantum bit or qubit), is not binary but rather more quaternary in nature. This qubit property arises as a direct consequence of its adherence to the laws of quantum mechanics which differ radically from the laws of classical physics. A qubit can exist not only in a state corresponding to the logical state 0 or 1 as in a classical bit, but also in states corresponding to a blend or superposition of these classical states. In other words, a qubit can exist as a zero, a one, or simultaneously as both 0 and 1, with a numerical coefficient representing the probability for each state. This may seem counterintuitive because everyday phenomenon are governed by classical physics, not quantum mechanics – which takes over at the atomic level. This rather difficult concept is perhaps best explained through an experiment. Consider Figure 1 below:
Quantum computing, which is the most famed topic in this era, a combination of quantum mechanics from the 1900s and the computing point of view, takes a huge place in the quantum realm. Starting from the foundation of abacus since 2700–2300 BC, we humans have always been trying to compute in different ways, and the most modern way of doing it comes with the binary system. Bit is the smallest unit of a binary system and can be in two states, either 0 or 1. On the contrary, quantum computing deals with the “quantum bit” or “qubit”; possible outcomes from the qubits are neither 0 nor 1. It will always be a combination of 0 and 1, which is based on the superposition principle from quantum physics. In this chapter, details of quantum logic gates are discussed for the circuit design perspective, which will be achievable for future realization of quantum computers. Architecture and corresponding formation of basic quantum circuits are discussed, along with the methods of quantum computing. How the technique differs from conventional approaches is also highlighted. The work may be directed toward future hardware realization of quantum information processing.
Quantum computation offers the potential for solving specific problems exponentially faster than the best classical machines, by virtue of its non-classical dynamics and information representation. Quantum mechanical bits (called 'qubits') can be both 0 and 1 at the same time, in which case the qubit is said to be in a superposition state. A quantum gate with input 0 or 1 gives the same output as a classical gate, but if the input is 0 and 1 simultaneously, the quantum gate performs the two corresponding operations simultaneously. Similarly, a 2-qubit gate with an input state prepared as a superposition of the 4 combinations 00, 01, 10 and 11, performs four simultaneous computations. In general, an N-qubit gate could perform 2/sup N/ computations at the same time. So as we increase the size of the system, the computational capacity of the apparatus goes up exponentially, compared to linearly for a classical computer. Using commercial NMR-spectrometers, simple quantum circuits are experimentally implemented consisting of multiple cascaded logic gates.
AbstractThe quantum computing has been proven to provide the solutions to most complex computations in the world today. Quantum computers can solve the problems with polynomial resources. Quantum information can be encoded in a number of ways, such as spin components of basic particles like photons, electrons, and polarization of photons. The quantum computer uses quantum bits which are superposition of states called as qubits, which is the classical fundamental unit of information. A quantum computer is a regular classical computer with additional ability to control the quantum bits. It is a regular computer connected to a special peripherals and a set of quantum bits simulated to build controller architecture. Two simulators are used for the quantum programming, one is Microsoft Q# and other is IBM Qiskit. Classical language Q # is used to program the quantum controller and its operations such that initializing a qubit, applying a gate on a qubit and measuring a qubit. IBM Qiskit programs simulates the functionality of quantum circuit and creates it’s drawing using a graphical interface with qubits, gates, and measurements. Qiskit provides simulators that run quantum circuits using visualization tools that help to understand the effect of our quantum circuits on the quantum states. The teleportation technique allows the quantum information to be communicated at a distance. An unbreakable encryption protocol is built for polarizing photons through the quantum channel. The combination of quantum computing and AI has the potential to drive significant advances across many sectors.