The Quantum Circuit Model and Universal Quantum Computation
... is then the measured state |ki. The probability of output |ki given the first two steps is |hk|U |ii|2 . Now one thing to be clear about from the onset is that this is not the most general quantum circuit we can construct, but it turns out that every quantum circuit in more general settings can be t ...
... is then the measured state |ki. The probability of output |ki given the first two steps is |hk|U |ii|2 . Now one thing to be clear about from the onset is that this is not the most general quantum circuit we can construct, but it turns out that every quantum circuit in more general settings can be t ...
Quantum Numbers and Orbitals
... • Therefore the px corresponds to -1, the py corresponds to 0, and the pz corresponds to + 1. • The other orbitals work in the same way – there are as many orbitals as magnetic quantum numbers. ...
... • Therefore the px corresponds to -1, the py corresponds to 0, and the pz corresponds to + 1. • The other orbitals work in the same way – there are as many orbitals as magnetic quantum numbers. ...
Fixed points of quantum operations
... It follows that · cb is a norm on the linear space CB(V, W) of completely bounded maps from V into W. If φcb ≤ 1, then φ is called completely contractive. If φk is positive for all k, then φ is called completely positive. Any completely positive map φ is completely bounded and φ(I) = φ = φ ...
... It follows that · cb is a norm on the linear space CB(V, W) of completely bounded maps from V into W. If φcb ≤ 1, then φ is called completely contractive. If φk is positive for all k, then φ is called completely positive. Any completely positive map φ is completely bounded and φ(I) = φ = φ ...
Liquid State NMR Quantum Computing
... Obviously, this is true only so long as the coherent superposition states are preserved throughout the computation. This means that the computation should be completed before quantum coherence is lost due to “decoherence” processes (in NMR, spin–spin and spin-lattice relaxation; see Relaxation: An I ...
... Obviously, this is true only so long as the coherent superposition states are preserved throughout the computation. This means that the computation should be completed before quantum coherence is lost due to “decoherence” processes (in NMR, spin–spin and spin-lattice relaxation; see Relaxation: An I ...
Quantum Clustering Algorithms - The International Machine
... Quantum information is very different from its classical counterpart: it cannot be measured reliably and it is disturbed by observation, but it can exist in a superposition of classical states. Classical and quantum information can be used together to realize wonders that are out of reach of classic ...
... Quantum information is very different from its classical counterpart: it cannot be measured reliably and it is disturbed by observation, but it can exist in a superposition of classical states. Classical and quantum information can be used together to realize wonders that are out of reach of classic ...
Solid-state quantum computing using spectral holes M. S. Shahriar, P. R. Hemmer,
... systems called quantum bits or qubits must be able to address and manipulate individual qubits, to effect coherent interactions between pairs of qubits, and to read out the value of qubits 关1,2兴. Current methods for addressing qubits are divided into spatial methods, as when a laser beam is focused ...
... systems called quantum bits or qubits must be able to address and manipulate individual qubits, to effect coherent interactions between pairs of qubits, and to read out the value of qubits 关1,2兴. Current methods for addressing qubits are divided into spatial methods, as when a laser beam is focused ...
Gravity and dark energy from quantum information
... Mod.Phys.Lett.A25:257-267,2010 Dark energy is cosmic Hawking radiation ...
... Mod.Phys.Lett.A25:257-267,2010 Dark energy is cosmic Hawking radiation ...
PPT - Fernando Brandao
... managed to overcome the previous difficulty by using a quantum trick: • Suppose there are only two witnesses { 1 , 2 } acceptance probability bigger than 2/3 (all other having acceptance prob. < 1/3) ...
... managed to overcome the previous difficulty by using a quantum trick: • Suppose there are only two witnesses { 1 , 2 } acceptance probability bigger than 2/3 (all other having acceptance prob. < 1/3) ...
Effect of quantum fluctuations on structural phase transitions in
... both the FE and AFD transitions involve only small structural distortions, we represent the energy surface by a Taylor expansion around the high-symmetry cubic perovskite structure, including up to fourth-order anharmonic terms. Second, because only low-energy distortions are important to the struct ...
... both the FE and AFD transitions involve only small structural distortions, we represent the energy surface by a Taylor expansion around the high-symmetry cubic perovskite structure, including up to fourth-order anharmonic terms. Second, because only low-energy distortions are important to the struct ...
Classical limit and quantum logic - Philsci
... In the foundations of physics, the quest of explaining how the laws of classical mechanics arise from the laws of quantum mechanics is known as the classical limit problem (Cohen 1989). Generally, this limit is studied for systems that, due to its interaction with the environment, develop a process ...
... In the foundations of physics, the quest of explaining how the laws of classical mechanics arise from the laws of quantum mechanics is known as the classical limit problem (Cohen 1989). Generally, this limit is studied for systems that, due to its interaction with the environment, develop a process ...
Quantum Condensed Matter Field Theory
... From analytical dynamics and fluid mechanics, to electrodynamics and quantum mechanics, lectures can often leave an impression that to each problem in physics a specific and formal exact solution is at hand. Such misconceptions are often reinforced by the allure of sophisticated analytical machinery ...
... From analytical dynamics and fluid mechanics, to electrodynamics and quantum mechanics, lectures can often leave an impression that to each problem in physics a specific and formal exact solution is at hand. Such misconceptions are often reinforced by the allure of sophisticated analytical machinery ...
Quantum computing
Quantum computing studies theoretical computation systems (quantum computers) that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. Quantum computers are different from digital computers based on transistors. Whereas digital computers require data to be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits (qubits), which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. Quantum computers share theoretical similarities with non-deterministic and probabilistic computers. The field of quantum computing was initiated by the work of Yuri Manin in 1980, Richard Feynman in 1982, and David Deutsch in 1985. A quantum computer with spins as quantum bits was also formulated for use as a quantum space–time in 1968.As of 2015, the development of actual quantum computers is still in its infancy, but experiments have been carried out in which quantum computational operations were executed on a very small number of quantum bits. Both practical and theoretical research continues, and many national governments and military agencies are funding quantum computing research in an effort to develop quantum computers for civilian, business, trade, and national security purposes, such as cryptanalysis.Large-scale quantum computers will be able to solve certain problems much more quickly than any classical computers that use even the best currently known algorithms, like integer factorization using Shor's algorithm or the simulation of quantum many-body systems. There exist quantum algorithms, such as Simon's algorithm, that run faster than any possible probabilistic classical algorithm.Given sufficient computational resources, however, a classical computer could be made to simulate any quantum algorithm, as quantum computation does not violate the Church–Turing thesis.