Mutually Unbiased bases: a brief survey
... non-degenerate observable, A, the projective measurement associated with it will have d possible outcomes, each with a certain probability. Thus by measuring an ensemble of equivalent unknown systems we will be able to estimate those probabilities and this way we can impose d − 1 conditions on the d ...
... non-degenerate observable, A, the projective measurement associated with it will have d possible outcomes, each with a certain probability. Thus by measuring an ensemble of equivalent unknown systems we will be able to estimate those probabilities and this way we can impose d − 1 conditions on the d ...
Distances in Probability Space and the Statistical Complexity
... it primarily to distinguish among different preparations of a given quantum state, and, more generally, to ascertain to what an extent two such states differ from one another. The concomitant considerations being of an intrinsic statistical nature, the concept can be applied to “any” probabilistic s ...
... it primarily to distinguish among different preparations of a given quantum state, and, more generally, to ascertain to what an extent two such states differ from one another. The concomitant considerations being of an intrinsic statistical nature, the concept can be applied to “any” probabilistic s ...
Chapter 38 - Quantum scattering
... Therefore, the task of constructing the semiclassics of a scattering system is completed, if we can find a connection between the spectral density d(E) and the scattering matrix S . We will see that (39.12) provides the clue. Note that the right hand side of (39.12) has nearly the structure of (39.1 ...
... Therefore, the task of constructing the semiclassics of a scattering system is completed, if we can find a connection between the spectral density d(E) and the scattering matrix S . We will see that (39.12) provides the clue. Note that the right hand side of (39.12) has nearly the structure of (39.1 ...
Interpreting Quantum Mechanics in Terms of - Philsci
... of observables on a single quantum system without disturbing its state appreciably, and its mechanism is independent of the controversial process of wavefunction collapse and only depends on the linear Schrödinger evolution and the Born rule, which are two established parts of quantum mechanics. As ...
... of observables on a single quantum system without disturbing its state appreciably, and its mechanism is independent of the controversial process of wavefunction collapse and only depends on the linear Schrödinger evolution and the Born rule, which are two established parts of quantum mechanics. As ...
Entanglement Entropy in a Triangular Billiard
... Recently it is shown that, by changing the boundary domain from regular to chaotic, the quantum entanglement can be enhanced in a system [20]. Hence, the classical dynamical properties can be reflected in the properties of quantum entanglement and as consequence it can be used for the entanglement e ...
... Recently it is shown that, by changing the boundary domain from regular to chaotic, the quantum entanglement can be enhanced in a system [20]. Hence, the classical dynamical properties can be reflected in the properties of quantum entanglement and as consequence it can be used for the entanglement e ...
Schroedinger`s cat states generated by the environment
... the formation of high-purity cat states may still be possible. For an Ohmic spectrum with the Debye cutoff ωD we find fM = αωD , and ΓM = α/β, where β is the inverse temperature and α < 1 is a dimensionless coupling constant. The condition in Eq. (7) may be satisfied at temperature below 1 mK, for f ...
... the formation of high-purity cat states may still be possible. For an Ohmic spectrum with the Debye cutoff ωD we find fM = αωD , and ΓM = α/β, where β is the inverse temperature and α < 1 is a dimensionless coupling constant. The condition in Eq. (7) may be satisfied at temperature below 1 mK, for f ...
Quantum teleportation
Quantum teleportation is a process by which quantum information (e.g. the exact state of an atom or photon) can be transmitted (exactly, in principle) from one location to another, with the help of classical communication and previously shared quantum entanglement between the sending and receiving location. Because it depends on classical communication, which can proceed no faster than the speed of light, it cannot be used for faster-than-light transport or communication of classical bits. It also cannot be used to make copies of a system, as this violates the no-cloning theorem. While it has proven possible to teleport one or more qubits of information between two (entangled) atoms, this has not yet been achieved between molecules or anything larger.Although the name is inspired by the teleportation commonly used in fiction, there is no relationship outside the name, because quantum teleportation concerns only the transfer of information. Quantum teleportation is not a form of transportation, but of communication; it provides a way of transporting a qubit from one location to another, without having to move a physical particle along with it.The seminal paper first expounding the idea was published by C. H. Bennett, G. Brassard, C. Crépeau, R. Jozsa, A. Peres and W. K. Wootters in 1993. Since then, quantum teleportation was first realized with single photons and later demonstrated with various material systems such as atoms, ions, electrons and superconducting circuits. The record distance for quantum teleportation is 143 km (89 mi).