Research program, TH Hansson
... concept of topologically protected qubitsviii. The idea is to code the quantum information in non-local, topological, degrees of freedom, which are insensitive to local perturbations such as electric or magnetic impurities. Although such a scheme can in principle be achieved using JJsix, the most wi ...
... concept of topologically protected qubitsviii. The idea is to code the quantum information in non-local, topological, degrees of freedom, which are insensitive to local perturbations such as electric or magnetic impurities. Although such a scheme can in principle be achieved using JJsix, the most wi ...
Quantum (wave) mechanics
... The Rutherford-Bohr model of the atom described the electron orbiting around the nucleus in circular orbits. This is a planetary model like the planets orbiting the Sun. However, in terms of Quantum Mechanics the electron has to be regarded as a wave so that experimental observations agree with theo ...
... The Rutherford-Bohr model of the atom described the electron orbiting around the nucleus in circular orbits. This is a planetary model like the planets orbiting the Sun. However, in terms of Quantum Mechanics the electron has to be regarded as a wave so that experimental observations agree with theo ...
Uncertainty Relations for Quantum Mechanical Observables
... 3 Heisenbergs noise-disturbance uncertainty Often the position-momentum uncertainty (2) is interpreted in the following setup: The observable A of the particle in the state ψ is measured with error η ψ (A). By this measurement noise ²ψ (B ) is inflicted on the state ψ. This noise is added to the me ...
... 3 Heisenbergs noise-disturbance uncertainty Often the position-momentum uncertainty (2) is interpreted in the following setup: The observable A of the particle in the state ψ is measured with error η ψ (A). By this measurement noise ²ψ (B ) is inflicted on the state ψ. This noise is added to the me ...
Quantum discord and remote state preparation
... attained in a number of trials that does not scale exponentially with n. In this protocol, the speedup can be achieved using factorized states. As suggested in Ref. [4], speedup could be due to the presence of another quantifier, the so called quantum discord, whose definition originates from the ob ...
... attained in a number of trials that does not scale exponentially with n. In this protocol, the speedup can be achieved using factorized states. As suggested in Ref. [4], speedup could be due to the presence of another quantifier, the so called quantum discord, whose definition originates from the ob ...
Four-photon orbital angular momentum entanglement
... in several degrees of freedom and exhibit quantum entanglement. Apart from the well-known polarization degrees, the photons can also be correlated in their spatial degrees; this manifests itself in continuous wavevector or (the Fourier-related) position entanglement.19 We can also explore the spatia ...
... in several degrees of freedom and exhibit quantum entanglement. Apart from the well-known polarization degrees, the photons can also be correlated in their spatial degrees; this manifests itself in continuous wavevector or (the Fourier-related) position entanglement.19 We can also explore the spatia ...
Quantum Szilard Engine - Physics (APS)
... fermionic SZE over the entire range of temperature. [See [18] for detailed discussions of the Wtot ðTÞ.] While details of Wtot ðTÞ depend on the confinement potential, its lowtemperature limits given in Table I are universal and have a deep physical meaning associated with the information content of ...
... fermionic SZE over the entire range of temperature. [See [18] for detailed discussions of the Wtot ðTÞ.] While details of Wtot ðTÞ depend on the confinement potential, its lowtemperature limits given in Table I are universal and have a deep physical meaning associated with the information content of ...
Conclusive Exclusion of Quantum States
... Introduction. Suppose we are given a single-shot device, guaranteed to prepare a system in a quantum state chosen at random from a finite set of k known states. In the quantum state discrimination problem, we would attempt to identify the state that has been prepared. It is a well known result [1] t ...
... Introduction. Suppose we are given a single-shot device, guaranteed to prepare a system in a quantum state chosen at random from a finite set of k known states. In the quantum state discrimination problem, we would attempt to identify the state that has been prepared. It is a well known result [1] t ...
A Post Processing Method for Quantum Prime Factorization
... calculations on complex variables and the point is that we must have high calculating accuracy. B. In a classic computer the smallest unit for saving data is a bit but at Quantum physics the smallest unit for saving data is a qubit then I have to simulate qubit by a class named Qubit. Qubit variable ...
... calculations on complex variables and the point is that we must have high calculating accuracy. B. In a classic computer the smallest unit for saving data is a bit but at Quantum physics the smallest unit for saving data is a qubit then I have to simulate qubit by a class named Qubit. Qubit variable ...
Lecture 11 - 12 - Cambridge University Press
... Today, quantum mechanics is the basis for understanding physical phenomena on the atomic and nano-meter scale. There are numerous applications of quantum mechanics in biology, chemistry and engineering. Those with significant economic impact include semiconductor transistors, lasers, quantum optics ...
... Today, quantum mechanics is the basis for understanding physical phenomena on the atomic and nano-meter scale. There are numerous applications of quantum mechanics in biology, chemistry and engineering. Those with significant economic impact include semiconductor transistors, lasers, quantum optics ...
Transition Probability (Fidelity) and its Relatives
... of quantum information theory its importance has become much more evident then before, though it has been clearly seen already in the so-called algebraic approach to quantum field theory and statistical physics. Of course, experimental progress can be made only in combination with dynamics, concrete ...
... of quantum information theory its importance has become much more evident then before, though it has been clearly seen already in the so-called algebraic approach to quantum field theory and statistical physics. Of course, experimental progress can be made only in combination with dynamics, concrete ...
doc - StealthSkater
... considered this generalization below). The dream would be that any M-matrix with a finite measurement resolution is obtained from a universal M-matrix with infinite measurement resolution existing in some sense by tracing over HFF N of type III1 and multiplying by the projector to N. The Tomita-Take ...
... considered this generalization below). The dream would be that any M-matrix with a finite measurement resolution is obtained from a universal M-matrix with infinite measurement resolution existing in some sense by tracing over HFF N of type III1 and multiplying by the projector to N. The Tomita-Take ...
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).