Experimental test of Heisenberg`s measurement uncertainty relation
... Recently, Busch, Lahti, and Werner (BLW) formulated uncertainty relations dealing with the imprecisions in joint measurements approximating incompatible observables [32, 33, 36]. The imprecisions or uncertainties, based on statistical distances between probability distributions of measurement outcom ...
... Recently, Busch, Lahti, and Werner (BLW) formulated uncertainty relations dealing with the imprecisions in joint measurements approximating incompatible observables [32, 33, 36]. The imprecisions or uncertainties, based on statistical distances between probability distributions of measurement outcom ...
quant-ph/0205032 PDF
... The proof goes through under the assumption that the distribution of the instrument variables pertaining to one station is independent of the setting of the other (if this assumption is not made, it is of course possible to reproduce the statistical predictions of quantum mechanics and thereby viola ...
... The proof goes through under the assumption that the distribution of the instrument variables pertaining to one station is independent of the setting of the other (if this assumption is not made, it is of course possible to reproduce the statistical predictions of quantum mechanics and thereby viola ...
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Quantum Decoherence and the - Philsci
... thermodynamical evolutions are not impossible; there are infinitely many of them. (The existence of anti-thermodynamical trajectories in phase space was the basis for Loschmidt’s reversibility objection to Boltzmann’s first H theorem; see Ehrenfest and Ehrenfest 1912.) One question we shall address ...
... thermodynamical evolutions are not impossible; there are infinitely many of them. (The existence of anti-thermodynamical trajectories in phase space was the basis for Loschmidt’s reversibility objection to Boltzmann’s first H theorem; see Ehrenfest and Ehrenfest 1912.) One question we shall address ...
Mixed states and pure states
... These are brief notes on the abstract formalism of quantum mechanics. They will introduce the concepts of pure and mixed quantum states. Some statements are indicated by a P. You should try and prove these statements. If you understand the formalism, then these statements should not be hard to prove ...
... These are brief notes on the abstract formalism of quantum mechanics. They will introduce the concepts of pure and mixed quantum states. Some statements are indicated by a P. You should try and prove these statements. If you understand the formalism, then these statements should not be hard to prove ...
Ab-initio Modeling of Cold Gases November 11, 2009
... Ecole polytechnique Paris, France We perform a theoretical study of a fermionic gas with two hyperfine states confined to an optical lattice. We derive a generic state diagram as a function of interaction strength, particle number, and confining potential. We discuss the central density, the double ...
... Ecole polytechnique Paris, France We perform a theoretical study of a fermionic gas with two hyperfine states confined to an optical lattice. We derive a generic state diagram as a function of interaction strength, particle number, and confining potential. We discuss the central density, the double ...
Practical Quantum Coin Flipping
... practical aspects, like multi-photon pulses, channel noise, system loss, detector dark counts and finite quantum efficiency, affect the honest abort and cheating probability. We prove that for a single coin flip, if the noise is up to 2% and for channel length up to 21km, we can achieve at the same ...
... practical aspects, like multi-photon pulses, channel noise, system loss, detector dark counts and finite quantum efficiency, affect the honest abort and cheating probability. We prove that for a single coin flip, if the noise is up to 2% and for channel length up to 21km, we can achieve at the same ...
Corley: Quantum Mechanics and Free Will
... approximation. The waves in Schrödinger‟s equation are probability waves. This probability is more like a tendency for something, in between possibility and reality. Thus, equation 1 has been found lacking (Heisenberg 1958). This probability function is its own sort of strange reality, in many-dimen ...
... approximation. The waves in Schrödinger‟s equation are probability waves. This probability is more like a tendency for something, in between possibility and reality. Thus, equation 1 has been found lacking (Heisenberg 1958). This probability function is its own sort of strange reality, in many-dimen ...
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).