A Model on Genome Evolution
... Many different estimates for the rate of evolution were made from the fossil records. As compiled by Gingerich[14][15] four hundred and nine such estimates were reported and they vary between 0 and 39 darwins in fossil linearage. Palebiological studies indicated that species usually change more rapi ...
... Many different estimates for the rate of evolution were made from the fossil records. As compiled by Gingerich[14][15] four hundred and nine such estimates were reported and they vary between 0 and 39 darwins in fossil linearage. Palebiological studies indicated that species usually change more rapi ...
... that, once a photon has been absorbed, the state of the field has been changed so that the next absorption event occurs against a different initial state than the previous one. In particular, a state with only n photons, can only have correlations up to n:th order. This implies the use of normally o ...
Assessing the applicability of quantum corrections to classical
... SW silicon is a stiff material, the group velocities for the quantum and classical systems are nearly identical and show weak temperature dependence. The relaxation times, however, have a large impact. Plotted in Fig. 2 are the phonon linewidths ( 2τ1 ) versus harmonic frequency at a temperature of ...
... SW silicon is a stiff material, the group velocities for the quantum and classical systems are nearly identical and show weak temperature dependence. The relaxation times, however, have a large impact. Plotted in Fig. 2 are the phonon linewidths ( 2τ1 ) versus harmonic frequency at a temperature of ...
The Need for Structure in Quantum Speedups
... Perhaps the central lesson gleaned from fifteen years of quantum algorithms research is this: Quantum computers can offer superpolynomial speedups over classical computers, but only for certain “structured” problems. The key question, of course, is what we mean by “structured.” In the context of mos ...
... Perhaps the central lesson gleaned from fifteen years of quantum algorithms research is this: Quantum computers can offer superpolynomial speedups over classical computers, but only for certain “structured” problems. The key question, of course, is what we mean by “structured.” In the context of mos ...
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... the entangled qubits from a singlet state into two L-km-long standard telecommunication fibers. The photons emerging from the fibers are then loaded into trapped-atom quantum memories [3]. These memories store the photon-polarization qubits in long-lived hyperfine levels. Because it is compatible with ...
... the entangled qubits from a singlet state into two L-km-long standard telecommunication fibers. The photons emerging from the fibers are then loaded into trapped-atom quantum memories [3]. These memories store the photon-polarization qubits in long-lived hyperfine levels. Because it is compatible with ...
From quantum cloning to quantum key distribution with
... machines, which achieve the best possible imperfect copying of the state that is compatible with quantum mechanics. A natural candidate for the optimal CV cloning machine is a transformation that adds the same noise to both quadrature components. By exploiting the connection between measurement and ...
... machines, which achieve the best possible imperfect copying of the state that is compatible with quantum mechanics. A natural candidate for the optimal CV cloning machine is a transformation that adds the same noise to both quadrature components. By exploiting the connection between measurement and ...
Four-photon orbital angular momentum entanglement
... matched simultaneously. In contrast to experiments on polarization entanglement, here, even small misalignment does not only reduce count rates but also alters the measurement projectors by inducing small rotations in the respective single-particle Hilbert space, and the 4-fold mode-matching exponen ...
... matched simultaneously. In contrast to experiments on polarization entanglement, here, even small misalignment does not only reduce count rates but also alters the measurement projectors by inducing small rotations in the respective single-particle Hilbert space, and the 4-fold mode-matching exponen ...
Quantum Physics 2005 Notes-8 Three-dimensional Schrodinger Equation Notes 8
... In chemistry, we designate the l=0 case as s, l=1 as p, l=2 as d, and l=3 as f. Note the ml does not affect the energy of a state because it does not appear in the radial equation. ...
... In chemistry, we designate the l=0 case as s, l=1 as p, l=2 as d, and l=3 as f. Note the ml does not affect the energy of a state because it does not appear in the radial equation. ...
(2)
... P label the classical phase space point under consideration and the adiabatic basis in the eigenvalue problem of Eq. 共4兲 is defined at each point in configuration space. In this Eulerian picture the adiabatic dynamics is not considered along an evolving trajectory but we shall show how to transform ...
... P label the classical phase space point under consideration and the adiabatic basis in the eigenvalue problem of Eq. 共4兲 is defined at each point in configuration space. In this Eulerian picture the adiabatic dynamics is not considered along an evolving trajectory but we shall show how to transform ...
Quantum dynamics of cold trapped ions with application to quantum
... a powerful new feature to be incorporated into data processing, namely, the capability of performing logical operations upon quantum mechanical superpositions of numbers. Thus in a conventional digital computer each data register is, throughout any computation, always in a definite state “1” or “0”; ...
... a powerful new feature to be incorporated into data processing, namely, the capability of performing logical operations upon quantum mechanical superpositions of numbers. Thus in a conventional digital computer each data register is, throughout any computation, always in a definite state “1” or “0”; ...
- Ingineeri.com
... measures it with one of his polarizers chosen at random. Since he does not know which direction Alice chose for her polarizer, his choice may not match hers. If it does match the basis, Bob will measure the same polarization as Alice sent, but if it doesn't match, Bob's measurement will be completel ...
... measures it with one of his polarizers chosen at random. Since he does not know which direction Alice chose for her polarizer, his choice may not match hers. If it does match the basis, Bob will measure the same polarization as Alice sent, but if it doesn't match, Bob's measurement will be completel ...
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.