A Landau-Ginzburg model, flat coordinates and a mirror theorem for
... isomorphic to QA : the fonction F (the Landau-Ginzburg model) yields a mirror partner of the small quantum cohomology F2 . The explicit construction of the quantum differential system QB associated with the LandauGinzburg model of F2 is interesting for several reasons: • first, it brings to light so ...
... isomorphic to QA : the fonction F (the Landau-Ginzburg model) yields a mirror partner of the small quantum cohomology F2 . The explicit construction of the quantum differential system QB associated with the LandauGinzburg model of F2 is interesting for several reasons: • first, it brings to light so ...
Quantum stochastic processes as models for state vector reduction
... works: a formalism in which the evolution of the quantum state V is controlled by stochastic rules in addition to the ordinary causal quantum dynamics. Such a quantumstochastic process (QSP) was first introduced long ago [18]. A general theory of QSP has recently been constructed [ 191 in terms of q ...
... works: a formalism in which the evolution of the quantum state V is controlled by stochastic rules in addition to the ordinary causal quantum dynamics. Such a quantumstochastic process (QSP) was first introduced long ago [18]. A general theory of QSP has recently been constructed [ 191 in terms of q ...
arXiv:quant-ph/0510223v4 1 Jun 2007 Foundations Of Quantum
... precise measurements than those mandated by the UP cannot be made. This must not be regarded as a limitation of the experimenter’s techniques, but a more intrinsic law of nature which dictates that whenever an attempt is made to measure one of a pair of canonical variables, the other is changed by a ...
... precise measurements than those mandated by the UP cannot be made. This must not be regarded as a limitation of the experimenter’s techniques, but a more intrinsic law of nature which dictates that whenever an attempt is made to measure one of a pair of canonical variables, the other is changed by a ...
PPt fileDavid Tannor
... a nuclear coordinate and three electronic states: the ground and two coupled diabatic excited states. The influence of the environment is modeled by the stochastic surrogate Hamiltonian. The excitation is generated by a Gaussian pulse where the phase control introduced a chirp to the pulse. For suff ...
... a nuclear coordinate and three electronic states: the ground and two coupled diabatic excited states. The influence of the environment is modeled by the stochastic surrogate Hamiltonian. The excitation is generated by a Gaussian pulse where the phase control introduced a chirp to the pulse. For suff ...
Commentary_Basti
... axiom, because regions integrated under given expectation values do not represent mutually exclusive states – i.e., the separation of variables in such distributions is not fixed, but, as it is evident in all the phenomena of phase transition, can evolve dynamically. The number and the properties o ...
... axiom, because regions integrated under given expectation values do not represent mutually exclusive states – i.e., the separation of variables in such distributions is not fixed, but, as it is evident in all the phenomena of phase transition, can evolve dynamically. The number and the properties o ...
Spintronics and Quantum Dots for Quantum Computing and
... chosen such that these effects are weak. Under these circumstances the spin coherence times (the time over which the phase of a superposition of spin-up and spin-down states is well-defined) can be completely different from the charge coherence times (a few nanoseconds), and in fact it is known that ...
... chosen such that these effects are weak. Under these circumstances the spin coherence times (the time over which the phase of a superposition of spin-up and spin-down states is well-defined) can be completely different from the charge coherence times (a few nanoseconds), and in fact it is known that ...
Propensities in Quantum Mechanics - Philsci
... In an excellent pioneering article published in 1954 Henry Margenau argued in favour of an interpretation of quantum observables as dispositional physical quantities, which he called latencies. The argument proceeded in two stages. First, negatively, Margenau argued against both Bohm’s theory and th ...
... In an excellent pioneering article published in 1954 Henry Margenau argued in favour of an interpretation of quantum observables as dispositional physical quantities, which he called latencies. The argument proceeded in two stages. First, negatively, Margenau argued against both Bohm’s theory and th ...
Interaction- and measurement-free quantum Zeno gates for universal computation
... The discrete and continuous systems can be mapped onto one another if we equate ↔ ⍀t / 2 and M ↔ M eff = ⌫t / 4 = ⌫ / 2⍀. The equivalence between the two systems can be understood by interpreting the spontaneous emission in the continuous case as a source of effective “measurements” by the reserv ...
... The discrete and continuous systems can be mapped onto one another if we equate ↔ ⍀t / 2 and M ↔ M eff = ⌫t / 4 = ⌫ / 2⍀. The equivalence between the two systems can be understood by interpreting the spontaneous emission in the continuous case as a source of effective “measurements” by the reserv ...
`To Be, To Be, What Does it Mean to Be?` : On Quantum
... processes, these processes cannot be seen in causal terms: these effects are effect without (classical) causes. I shall call such models or the corresponding theories, or ways of thinking, “nonclassical.” In this view, things of nature or mind (since this view can also apply to mind) do exist, but i ...
... processes, these processes cannot be seen in causal terms: these effects are effect without (classical) causes. I shall call such models or the corresponding theories, or ways of thinking, “nonclassical.” In this view, things of nature or mind (since this view can also apply to mind) do exist, but i ...
Classification of completely positive maps
... past decade or so in the context of interest in quantum information theory and quantum computing. In particular, in principle quantum computers offer tremendously increased speed to solve certain computational problems by the use of closed quantum systems. But in the laboratory no systems are truly ...
... past decade or so in the context of interest in quantum information theory and quantum computing. In particular, in principle quantum computers offer tremendously increased speed to solve certain computational problems by the use of closed quantum systems. But in the laboratory no systems are truly ...
Introduction to Quantum Information and Computation for Chemistry
... What they conjectured then is what we call today a quantum computer. A quantum computer is a device that takes direct advantage of quantum mechanical phenomena such as superposition and entanglement to perform calculations [12]. Because they compute in ways that classical computers cannot, for certa ...
... What they conjectured then is what we call today a quantum computer. A quantum computer is a device that takes direct advantage of quantum mechanical phenomena such as superposition and entanglement to perform calculations [12]. Because they compute in ways that classical computers cannot, for certa ...
Quantum coding with finite resources
... inputs and the receiver needs to perform a joint measurement on all channel outputs. While classical computers can readily operate on very large amounts of data, at least for the near future it appears unrealistic to expect that encoding and decoding circuits can store or coherently manipulate large ...
... inputs and the receiver needs to perform a joint measurement on all channel outputs. While classical computers can readily operate on very large amounts of data, at least for the near future it appears unrealistic to expect that encoding and decoding circuits can store or coherently manipulate large ...
md-vol 4 no 2.qxp - md
... During the same centuries, the fundamental science studying the non-living nature expanded essentially our ideas about it, in particular, due to the field concepts. And nowadays, even at domestic level nobody is surprised at the possibility to tune the radio or TV sets to a great number of stations ...
... During the same centuries, the fundamental science studying the non-living nature expanded essentially our ideas about it, in particular, due to the field concepts. And nowadays, even at domestic level nobody is surprised at the possibility to tune the radio or TV sets to a great number of stations ...
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.