Few-electron quantum dot circuit with integrated charge read out
... of 50 GHz is applied to P . The microwaves pump current I by absorption of photons. This photon-assisted current shows up as two lines, indicated by the two arrows. The white line (bottom) corresponds to pumping from the left to the right reservoir, the dark line (top) corresponds to pumping in the ...
... of 50 GHz is applied to P . The microwaves pump current I by absorption of photons. This photon-assisted current shows up as two lines, indicated by the two arrows. The white line (bottom) corresponds to pumping from the left to the right reservoir, the dark line (top) corresponds to pumping in the ...
EMBEDDABLE QUANTUM HOMOGENEOUS SPACES 1
... Proposition 3.1 says that if we are given a W∗ -quantum G-space X with an equivariant map γ : L∞(X) → L∞(G) then we may regard L∞(X) as a right coideal in L∞(G). Therefore, in such a situation, we will from now on assume that the embedding is part of the data. Definition 3.2. Let G be a locally comp ...
... Proposition 3.1 says that if we are given a W∗ -quantum G-space X with an equivariant map γ : L∞(X) → L∞(G) then we may regard L∞(X) as a right coideal in L∞(G). Therefore, in such a situation, we will from now on assume that the embedding is part of the data. Definition 3.2. Let G be a locally comp ...
The symmetrized quantum potential and space as a direct
... dynamical system is composed by the pendulum alone. On the other hand, as it has been rightly underlined by Rovelli, the same physical situation can be analyzed also from a different perspective, which according to the authors is more coherent with experimental facts. One can say that there is a phy ...
... dynamical system is composed by the pendulum alone. On the other hand, as it has been rightly underlined by Rovelli, the same physical situation can be analyzed also from a different perspective, which according to the authors is more coherent with experimental facts. One can say that there is a phy ...
First-principles study of the electronic structure of CdS/ZnSe coupled
... quantum dots as the small effective area of the interface in a coupled quantum dot helps a large part of the structure remain free from any substantial strain. We argue that in contrast to coreshell nanowires, quantum confinement is the key parameter that controls the electronic properties of couple ...
... quantum dots as the small effective area of the interface in a coupled quantum dot helps a large part of the structure remain free from any substantial strain. We argue that in contrast to coreshell nanowires, quantum confinement is the key parameter that controls the electronic properties of couple ...
Entanglement verification and steering when Alice and Bob cannot
... to ‘semiquantum games’. These are games involving two experimenters, Alice and Bob, sharing a bipartite state ρAB , and a referee, Charlie, who will question them and receive answers, which he uses to calculate their payoff. The term ‘semiquantum’, introduced by Buscemi [5], refers to the fact that ...
... to ‘semiquantum games’. These are games involving two experimenters, Alice and Bob, sharing a bipartite state ρAB , and a referee, Charlie, who will question them and receive answers, which he uses to calculate their payoff. The term ‘semiquantum’, introduced by Buscemi [5], refers to the fact that ...
The Copenhagen Interpretation
... The specifications B on the subsequent measurement and its possible result are similarly couched in a language that allows a suitably trained technician to set up a measurement of the specified kind and to determme whether the result that occurs is a result of the specified kind. These specification ...
... The specifications B on the subsequent measurement and its possible result are similarly couched in a language that allows a suitably trained technician to set up a measurement of the specified kind and to determme whether the result that occurs is a result of the specified kind. These specification ...
Why Philosophers Should Care About
... computability theory—and some invoke the concept of computational complexity, but no particular results from the field devoted to it. Perhaps the closest in spirit to this essay are the interesting articles by Cherniak [40] and Morton [98]. In addition, many writers have made some version of the ob ...
... computability theory—and some invoke the concept of computational complexity, but no particular results from the field devoted to it. Perhaps the closest in spirit to this essay are the interesting articles by Cherniak [40] and Morton [98]. In addition, many writers have made some version of the ob ...
MATHEMATICAL HISTORY OF WAVE AND MATRIX QUANTUM
... theory. This consisted in the obvious requirement that ordinary classical mechanics had to hold to a high degree of approximation in the limiting case where the numbers of the stationary states, the so-called quantum numbers, were very large. The correspondence principle acted as a code book for tra ...
... theory. This consisted in the obvious requirement that ordinary classical mechanics had to hold to a high degree of approximation in the limiting case where the numbers of the stationary states, the so-called quantum numbers, were very large. The correspondence principle acted as a code book for tra ...
Experimental demonstration of quantum correlations over more than
... relatively inefficient and noisy. Nevertheless, the experimental results clearly indicate that the strong quantum correlations can be maintained over such large distances. The experimental fact that quantum correlations are maintained over long distances is interesting for fundamental physics as wel ...
... relatively inefficient and noisy. Nevertheless, the experimental results clearly indicate that the strong quantum correlations can be maintained over such large distances. The experimental fact that quantum correlations are maintained over long distances is interesting for fundamental physics as wel ...
Lecture Notes for Ph219/CS219: Quantum Information and Computation Chapter 2 John Preskill
... there are two quite distinct ways for a quantum state to change. On the one hand there is unitary evolution, which is deterministic. If we specify the initial state |ψ(0)i, the theory predicts the state |ψ(t)i at a later time. But on the other hand there is measurement, which is probabilistic. The t ...
... there are two quite distinct ways for a quantum state to change. On the one hand there is unitary evolution, which is deterministic. If we specify the initial state |ψ(0)i, the theory predicts the state |ψ(t)i at a later time. But on the other hand there is measurement, which is probabilistic. The t ...
On the Topological Origin of Entanglement in Ising Spin Glasses
... is therefore necessary to treat the spins as genuinely non-Abelian objects, like one is forced to in the presence of a transverse magnetic field. On the other hand, if the measurement is along the x̂ direction, the entanglement between the remaining qubits can be easily accounted for by the linking ...
... is therefore necessary to treat the spins as genuinely non-Abelian objects, like one is forced to in the presence of a transverse magnetic field. On the other hand, if the measurement is along the x̂ direction, the entanglement between the remaining qubits can be easily accounted for by the linking ...
SUPERCONDUCTING QUBITS II: DECOHERENCE F.K. Wilhelm , M.J. Storcz and U. Hartmann
... together with the equations 12 and 18 tracing both damping and noise back to a single function χ constitute the famous fluctuation-dissipation theorem (Callen and Welton, 1951), a generalization of the Einstein relation in diffusion. In this very successful approach we have characterized the distrib ...
... together with the equations 12 and 18 tracing both damping and noise back to a single function χ constitute the famous fluctuation-dissipation theorem (Callen and Welton, 1951), a generalization of the Einstein relation in diffusion. In this very successful approach we have characterized the distrib ...
Entanglement purification for Quantum Computation
... is then used —together with high–quality single–particle operations— to implement in a deterministic way two– particle gates between the logical qubits. For instance, a CNOT-gate [10] between A1 and B1 can be realized using schemes presented in Ref. [11–13]. We find that the physical two–particle ga ...
... is then used —together with high–quality single–particle operations— to implement in a deterministic way two– particle gates between the logical qubits. For instance, a CNOT-gate [10] between A1 and B1 can be realized using schemes presented in Ref. [11–13]. We find that the physical two–particle ga ...
Quantum information or quantum coding? - Philsci
... Theorem proves that, for sufficiently long messages, the optimal number Lmin of qubits necessary to transmit the messages generated by the source with vanishing error is given by NS (ρ ) . Schumacher designs the proof of the theorem by close analogy with the corresponding Shannon’s theorem. Again, ...
... Theorem proves that, for sufficiently long messages, the optimal number Lmin of qubits necessary to transmit the messages generated by the source with vanishing error is given by NS (ρ ) . Schumacher designs the proof of the theorem by close analogy with the corresponding Shannon’s theorem. Again, ...
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.