In the early 1930s, the relativistic electron
... to quantum field theory. His idea was to sidestep the problem of divergences in quantum field theory – in his view due to the point-like interaction between fields – by considering only what he saw as measurable quantities (Miller, 1994, p. 97). Heisenberg's idea was to retain only basic elements of ...
... to quantum field theory. His idea was to sidestep the problem of divergences in quantum field theory – in his view due to the point-like interaction between fields – by considering only what he saw as measurable quantities (Miller, 1994, p. 97). Heisenberg's idea was to retain only basic elements of ...
Coupled quantum dots as quantum gates
... GaAs can be on the order of microseconds,23 whereas for charge degrees of freedom dephasing times are typically much less, on the order of nanoseconds.24,25 In addition to a well-defined qubit, we also need a controllable ‘‘source of entanglement,’’ i.e., a mechanism by which two specified qubits at ...
... GaAs can be on the order of microseconds,23 whereas for charge degrees of freedom dephasing times are typically much less, on the order of nanoseconds.24,25 In addition to a well-defined qubit, we also need a controllable ‘‘source of entanglement,’’ i.e., a mechanism by which two specified qubits at ...
A quantum computing primer for operator theorists
... unit vector in Cd . A vector state |ψ in HN is said to be entangled if it cannot be ...
... unit vector in Cd . A vector state |ψ in HN is said to be entangled if it cannot be ...
Full Text
... The study investigated the use of Quantum Physics Conceptual Survey (QPCS) in probing student understanding of quantum physics. Altogether 103 Finnish university students responded to QPCS. The mean scores of the student responses were calculated and the test was evaluated using common five indices: ...
... The study investigated the use of Quantum Physics Conceptual Survey (QPCS) in probing student understanding of quantum physics. Altogether 103 Finnish university students responded to QPCS. The mean scores of the student responses were calculated and the test was evaluated using common five indices: ...
Experimental Realization of a Simple Entangling Optical Gate for
... very promising for future implementations of quantum computers and the creation of such a cluster state is also the main goal of the experiment which is investigated in this thesis. To effectively create such an cluster state, one has to entangle individual qubits by applying CSIGN-gates between the ...
... very promising for future implementations of quantum computers and the creation of such a cluster state is also the main goal of the experiment which is investigated in this thesis. To effectively create such an cluster state, one has to entangle individual qubits by applying CSIGN-gates between the ...
ptt-file - Parmenides Foundation
... A New Look at Quantum Physics and Relativity? • The canvas of local space-time constitutes only together with factization. It is thus not applicable to the status “ante”. • Relativity doesn’t allow for a “now” that would be mandatory for the entire universe. Quantum physics, instead, requires a str ...
... A New Look at Quantum Physics and Relativity? • The canvas of local space-time constitutes only together with factization. It is thus not applicable to the status “ante”. • Relativity doesn’t allow for a “now” that would be mandatory for the entire universe. Quantum physics, instead, requires a str ...
Quantum tomography of an electron - Hal-CEA
... (QPC). The split-gate voltage VG controls the transmission D of the onedimensional electronic mode formed at the QPC. A d.c. voltage VR (not shown) and a weak a.c. voltage VLO(t) 5 (kgLOhn0/e)cos(2pkn0(t 2 t)) are applied to the right contact The latter generates a small flux of electrons and holes ...
... (QPC). The split-gate voltage VG controls the transmission D of the onedimensional electronic mode formed at the QPC. A d.c. voltage VR (not shown) and a weak a.c. voltage VLO(t) 5 (kgLOhn0/e)cos(2pkn0(t 2 t)) are applied to the right contact The latter generates a small flux of electrons and holes ...
Description of quantum coherence in thermodynamic
... the free Hamiltonian H of the system should not play any particular role. However, this is not the case, and from a perspective of asymmetry we find that: Theorem 1: The set of thermal operations on a quantum system is a strict subset of the set of symmetric quantum operations with respect to time-tr ...
... the free Hamiltonian H of the system should not play any particular role. However, this is not the case, and from a perspective of asymmetry we find that: Theorem 1: The set of thermal operations on a quantum system is a strict subset of the set of symmetric quantum operations with respect to time-tr ...
Reflection Symmetry and Energy-Level Ordering in Frustrated Spin
... The quantum fluctuations destroy Néel state and the ground state (GS) of quantum system has more complicated structure. However, for bipartite spin systems, the quantum GS inherits some properties of its classical counterpart. Lieb & Mattis [J. Math. Phys. 3, 749 (1962)] proved that The quantum GS o ...
... The quantum fluctuations destroy Néel state and the ground state (GS) of quantum system has more complicated structure. However, for bipartite spin systems, the quantum GS inherits some properties of its classical counterpart. Lieb & Mattis [J. Math. Phys. 3, 749 (1962)] proved that The quantum GS o ...
Heisenberg`s original derivation of the uncertainty principle and its
... been credited only with a constraint for state preparation represented by eq. (3). This article aims to resolve this longstanding confusion. It will be shown that in 1927 Heisenberg1 actually ‘proved’ not only eq. (2) but also eq. (1) from basic postulates for quantum mechanics. In showing that, it ...
... been credited only with a constraint for state preparation represented by eq. (3). This article aims to resolve this longstanding confusion. It will be shown that in 1927 Heisenberg1 actually ‘proved’ not only eq. (2) but also eq. (1) from basic postulates for quantum mechanics. In showing that, it ...
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).