Quantum Computing - Department of Computing
... cancel each other. This experiment proves therefore that ordinary probabilities are inadequate to describe the position of electrons. It is as if we also require negative probabilities. In quantum mechanics the distribution of electrons when slit 2 (respectively, slit 1) is closed is given by the pr ...
... cancel each other. This experiment proves therefore that ordinary probabilities are inadequate to describe the position of electrons. It is as if we also require negative probabilities. In quantum mechanics the distribution of electrons when slit 2 (respectively, slit 1) is closed is given by the pr ...
The Quantum IO Monad - School of Computer Science
... We believe that a purely functional approach is ideally suited for this venture, since it already makes effects explicit (in Haskell via the IO monad) and is close to a mathematical semantics of quantum programming (see our introductory comments on constructive semantics). While QIO realises the inf ...
... We believe that a purely functional approach is ideally suited for this venture, since it already makes effects explicit (in Haskell via the IO monad) and is close to a mathematical semantics of quantum programming (see our introductory comments on constructive semantics). While QIO realises the inf ...
Causal structural realism in canonical quantum gravity
... arguably mathematically more rigorous than in the quantum geometrodynamical case (e.g. a Hamiltonian or Wheeler-DeWitt constraint operator can be rigorously constructed to some extent, see Thiemann 2007, ch. 10). As can be expected, the implementation of this constraint operator displays no explicit ...
... arguably mathematically more rigorous than in the quantum geometrodynamical case (e.g. a Hamiltonian or Wheeler-DeWitt constraint operator can be rigorously constructed to some extent, see Thiemann 2007, ch. 10). As can be expected, the implementation of this constraint operator displays no explicit ...
Gold, copper, silver and aluminum nanoantennas to enhance
... Single molecules, nanocrystals and nanotubes are relevant light emitters for fundamental research and applications.1,2,3,4,5,6 However, many of these systems exhibit a low quantum yield and often photobleach. The latter issue can be solved by embedding the emitter into a matrix, such that reactive e ...
... Single molecules, nanocrystals and nanotubes are relevant light emitters for fundamental research and applications.1,2,3,4,5,6 However, many of these systems exhibit a low quantum yield and often photobleach. The latter issue can be solved by embedding the emitter into a matrix, such that reactive e ...
An alternative quantization procedure for the Hydrogen atom
... the nucleus result into a spectrum different from the real 3D case. Since many years already, conjectures have been advanced as how to frame these differences into sound dynamical aspects of the system [38, 45, 48]. The case is emblematic of the so-called space quantization problem, soon going beyon ...
... the nucleus result into a spectrum different from the real 3D case. Since many years already, conjectures have been advanced as how to frame these differences into sound dynamical aspects of the system [38, 45, 48]. The case is emblematic of the so-called space quantization problem, soon going beyon ...
Opening up three quantum boxes causes classically undetectable
... through use of a Leggett–Garg inequality (1) and discuss the implications of our result. In the “three-box” quantum game (12), Alice and Bob each inspect a freshly prepared three-state system (classically, three separate boxes hiding one ball) using an apparatus that answers the question “Is the sys ...
... through use of a Leggett–Garg inequality (1) and discuss the implications of our result. In the “three-box” quantum game (12), Alice and Bob each inspect a freshly prepared three-state system (classically, three separate boxes hiding one ball) using an apparatus that answers the question “Is the sys ...
QUANTUM SPIN LIQUIDS: QUEST FOR THE ODD PARTICLE
... Aside from the Gapped Spin Liquids, discussed above, a less well-understood and perhaps more interesting class is that of Gapless Spin Liquids. Some of these spin liquids are characterized by a gap to spinful excitations but have gapless “dimer resonances” which survive down to the lowest energy. Su ...
... Aside from the Gapped Spin Liquids, discussed above, a less well-understood and perhaps more interesting class is that of Gapless Spin Liquids. Some of these spin liquids are characterized by a gap to spinful excitations but have gapless “dimer resonances” which survive down to the lowest energy. Su ...
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.