LanZ_0112_eps(1).
... This thesis explores Feynman’s idea of quantum simulations by using ultracold quantum gases. In the first part of the thesis we develop a general method applicable to atoms or molecules or even nanoparticles, to decelerate a hot fast gas beam to zero velocity by using an optical cavity. This deceler ...
... This thesis explores Feynman’s idea of quantum simulations by using ultracold quantum gases. In the first part of the thesis we develop a general method applicable to atoms or molecules or even nanoparticles, to decelerate a hot fast gas beam to zero velocity by using an optical cavity. This deceler ...
Coupling Josephson qubits via a current
... Experimentally, the above procedure can be repeated many times at each of the four sets of angles and thus the correlation function E(θ1 , θ2 , β2 ) = [Nsame (θ1 , θ2 ) − Ndiff (θ1 , θ2 )]/Ntot , with Nsame (θ1 , θ2 ) (Ndiff (θ1 , θ2 )) being the number of events with two qubits being found in the s ...
... Experimentally, the above procedure can be repeated many times at each of the four sets of angles and thus the correlation function E(θ1 , θ2 , β2 ) = [Nsame (θ1 , θ2 ) − Ndiff (θ1 , θ2 )]/Ntot , with Nsame (θ1 , θ2 ) (Ndiff (θ1 , θ2 )) being the number of events with two qubits being found in the s ...
Here
... The state space of a composite quantum system is the tensor product of the state spaces of the component quantum systems. It is only when measurements are made that indetermination and probabilities come into quantum theory. Otherwise, things are very deterministic. The collapse of the wave functi ...
... The state space of a composite quantum system is the tensor product of the state spaces of the component quantum systems. It is only when measurements are made that indetermination and probabilities come into quantum theory. Otherwise, things are very deterministic. The collapse of the wave functi ...
Document
... • 1926 – Enrico Fermi & Paul Dirac – formulated (independently) the Fermi-Dirac statistics, which describes distribution of many identical particles obeying the Pauli exclusion principle (fermions with half-integer spins – contrary to bosons satisfying the Bose-Einstein statistics) • 1926 – Erwin Sc ...
... • 1926 – Enrico Fermi & Paul Dirac – formulated (independently) the Fermi-Dirac statistics, which describes distribution of many identical particles obeying the Pauli exclusion principle (fermions with half-integer spins – contrary to bosons satisfying the Bose-Einstein statistics) • 1926 – Erwin Sc ...
The Weirdness of Quantum Mechanics
... 1. It implies that certain properties can only achieve a discrete set of measured values 2. It implies that measurement is inherently probabilistic. 3. It implies that measurement necessarily alters the observed ...
... 1. It implies that certain properties can only achieve a discrete set of measured values 2. It implies that measurement is inherently probabilistic. 3. It implies that measurement necessarily alters the observed ...
Quantum coherence: myth or fact?
... Only when the state is pure does this representation become unique. The laws of quantum mechanics say that (in the absence of any additional information other than the state’s identity) no physical interpretation can be based on a preferred choice of an ensemble for this decomposition [3]. This resu ...
... Only when the state is pure does this representation become unique. The laws of quantum mechanics say that (in the absence of any additional information other than the state’s identity) no physical interpretation can be based on a preferred choice of an ensemble for this decomposition [3]. This resu ...
slides - Frontiers of Fundamental Physics (FFP14)
... formalism is by no means limited to such (presumed) fundamental particles. There is no restriction of principle on its application to any physical system. One could apply the formalism to sewing machines if there were any reason to do so!” (Stachel 1986) ...
... formalism is by no means limited to such (presumed) fundamental particles. There is no restriction of principle on its application to any physical system. One could apply the formalism to sewing machines if there were any reason to do so!” (Stachel 1986) ...
Solution
... of a potential energy. The interpretation of the above is the following. The (x, px ) projection of the phase space of the particle is discretized into cells ∆x∆px ∼ 2πh̄ = h, and equivalent expressions for the directions y and z. The cells have quantum origin and are related to the Heisenberg’s unc ...
... of a potential energy. The interpretation of the above is the following. The (x, px ) projection of the phase space of the particle is discretized into cells ∆x∆px ∼ 2πh̄ = h, and equivalent expressions for the directions y and z. The cells have quantum origin and are related to the Heisenberg’s unc ...
Wormholes and quantum cloning
... Picture fed into the mechanism controlling the fire. Wait a while. ...
... Picture fed into the mechanism controlling the fire. Wait a while. ...
Quantum Mechanics
... it doesn’t work for helium… it doesn’t account for spectral line intensities… it doesn’t account for splitting of some spectral lines… it doesn’t account for interactions between atoms… and we haven’t explained “stationary states.” Looks like we’ve got some work to do. You may be on the right track, ...
... it doesn’t work for helium… it doesn’t account for spectral line intensities… it doesn’t account for splitting of some spectral lines… it doesn’t account for interactions between atoms… and we haven’t explained “stationary states.” Looks like we’ve got some work to do. You may be on the right track, ...
authentication with quantum smart-card
... presents the quantum channel (optical fiber), the double dotted line presents the electric connection from the photocell source and signal connection with teller machine. The single dotted line is the signal pulse connection between the microchip and polarization modulator, which are integrated and ...
... presents the quantum channel (optical fiber), the double dotted line presents the electric connection from the photocell source and signal connection with teller machine. The single dotted line is the signal pulse connection between the microchip and polarization modulator, which are integrated and ...
Quantum Mechanics - University of Colorado Boulder
... of statements called axioms or postulates or laws. Laws or Postulates are statements that are presented without proof; they cannot be proven; we believe them to be true because they have been experimentally verified. Newton's 2nd Law, Fnet ma , is a postulate; it cannot be proven from more fundame ...
... of statements called axioms or postulates or laws. Laws or Postulates are statements that are presented without proof; they cannot be proven; we believe them to be true because they have been experimentally verified. Newton's 2nd Law, Fnet ma , is a postulate; it cannot be proven from more fundame ...
Statistics, Causality and Bell`s theorem
... one of the three principles. Its formulation refers to outcomes of measurements which are not actually performed, so we have to assume their existence, alongside of the outcomes of those actually performed: the principle of realism, or more precisely, counterfactual definiteness. Finally we need to ...
... one of the three principles. Its formulation refers to outcomes of measurements which are not actually performed, so we have to assume their existence, alongside of the outcomes of those actually performed: the principle of realism, or more precisely, counterfactual definiteness. Finally we need to ...
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).