Exploring topological phases with quantum walks
... in a system of noninteracting particles is determined by the dimensionality of the system and the underlying symmetries of its Hamiltonian. Figure 2 shows the ten classes of topological phases, which can arise in 1D and 2D systems with and without time-reversal symmetry (TRS) and particle-hole symme ...
... in a system of noninteracting particles is determined by the dimensionality of the system and the underlying symmetries of its Hamiltonian. Figure 2 shows the ten classes of topological phases, which can arise in 1D and 2D systems with and without time-reversal symmetry (TRS) and particle-hole symme ...
Antihydrogen Gravitational States Abstract - Institut Laue
... the gravitational acceleration of neutrons [4, 5] and atoms [6–9]. However, the experiments with anti atoms ( see [10, 11] and references therein) are even more interesting in view of testing WEP, because the theories striving to unify gravity and quantum mechanics (such as supersymmetric string the ...
... the gravitational acceleration of neutrons [4, 5] and atoms [6–9]. However, the experiments with anti atoms ( see [10, 11] and references therein) are even more interesting in view of testing WEP, because the theories striving to unify gravity and quantum mechanics (such as supersymmetric string the ...
On quantum detection and the square
... UPPOSE that a transmitter, Alice, wants to convey classical information to a receiver, Bob, using a quantum-mechanical channel. Alice represents messages by preparing the quantum channel in a pure quantum state drawn from a collection of known states. Bob detects the information by subjecting the ch ...
... UPPOSE that a transmitter, Alice, wants to convey classical information to a receiver, Bob, using a quantum-mechanical channel. Alice represents messages by preparing the quantum channel in a pure quantum state drawn from a collection of known states. Bob detects the information by subjecting the ch ...
Pure Wave Mechanics and the Very Idea of Empirical Adequacy
... composite system A + S, i ai ψ[“i”]A φiS , as an eigenstate of Ô corresponding to eigenvalue +1 and a state orthogonal to this as an eigenstate of Ô corresponding to eigenvalue −1.4 It immediately follows from the fact that the linear dynamics always allows one at least in principle to detect inte ...
... composite system A + S, i ai ψ[“i”]A φiS , as an eigenstate of Ô corresponding to eigenvalue +1 and a state orthogonal to this as an eigenstate of Ô corresponding to eigenvalue −1.4 It immediately follows from the fact that the linear dynamics always allows one at least in principle to detect inte ...
Biological Autonomy
... spontaneous emission (this formulation is somewhat simplified; for details, see Milonni 1994, 142-43, 151). In quantum physics there is no spontaneous emission without its pair process, absorption. Single quantum fluctuations are not completely determined by previous physical conditions working with ...
... spontaneous emission (this formulation is somewhat simplified; for details, see Milonni 1994, 142-43, 151). In quantum physics there is no spontaneous emission without its pair process, absorption. Single quantum fluctuations are not completely determined by previous physical conditions working with ...
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).