Macroscopicity of Mechanical Quantum Superposition States
... normalized phase-space distribution, whose standard deviations for the position and the momentum variable will be denoted by σs and σq . The von Neumann equation is reobtained for σs = σq = 0. The modification (1) serves its purpose of classicalizing the motion of a single particle: It effects a dec ...
... normalized phase-space distribution, whose standard deviations for the position and the momentum variable will be denoted by σs and σq . The von Neumann equation is reobtained for σs = σq = 0. The modification (1) serves its purpose of classicalizing the motion of a single particle: It effects a dec ...
White paper: The logic of quantum mechanics
... • At the same time we also axiomatize the compositional structure of operations/processes i.e. we aim at an a priori dynamical theory. The phenomena associated with the particular structure of the tensor product are of an essentially dynamical nature involving multiple processes. Also, recent progre ...
... • At the same time we also axiomatize the compositional structure of operations/processes i.e. we aim at an a priori dynamical theory. The phenomena associated with the particular structure of the tensor product are of an essentially dynamical nature involving multiple processes. Also, recent progre ...
Quantum Information
... In general, information is expressed in bits which may have the value “0” or “1”. In computers, bits are represented as the physical states of a certain physical system. For example, they could be pits on a CD. It is obvious that a physical bit can only be either “0” or “1”, as long as it is represe ...
... In general, information is expressed in bits which may have the value “0” or “1”. In computers, bits are represented as the physical states of a certain physical system. For example, they could be pits on a CD. It is obvious that a physical bit can only be either “0” or “1”, as long as it is represe ...
Introduction to quantum mechanics
... that were known. 1924 (de Broglie): Louis de Broglie proposed that all particles are associated with waves, where the frequency and wavenumber of the wave are given by the same relations we found above for photons, namely E = h̄ω and p = h̄k. The larger E and p are, the larger ω and k are. Even for ...
... that were known. 1924 (de Broglie): Louis de Broglie proposed that all particles are associated with waves, where the frequency and wavenumber of the wave are given by the same relations we found above for photons, namely E = h̄ω and p = h̄k. The larger E and p are, the larger ω and k are. Even for ...
April 16, 1998 - StealthSkater
... interaction Hamiltonian. In particular, there does not appear to be any meaning to what Larry Crowell describes as "self-measurement" in terms of the von Neumann theory. Therefore, any appeal to a Cantor diagonal argument for a strange loop in a quantum Turing machine has no context until precisely ...
... interaction Hamiltonian. In particular, there does not appear to be any meaning to what Larry Crowell describes as "self-measurement" in terms of the von Neumann theory. Therefore, any appeal to a Cantor diagonal argument for a strange loop in a quantum Turing machine has no context until precisely ...
Turing Machine
... For the same reasons that DNA was presumably selected for living organisms as a genetic material, its stability and predictability in reactions, DNA strings can also be used to encode information for mathematical systems. ...
... For the same reasons that DNA was presumably selected for living organisms as a genetic material, its stability and predictability in reactions, DNA strings can also be used to encode information for mathematical systems. ...
Quantum information processing with atoms and ions
... they can, at the same time, be decoupled from the environment very efficiently. The ions stored and laser cooled in an electromagnetic trap can be described in terms of a set of external and internal degrees of freedom. The first ones are closely related to the center of mass motion of each ion, whe ...
... they can, at the same time, be decoupled from the environment very efficiently. The ions stored and laser cooled in an electromagnetic trap can be described in terms of a set of external and internal degrees of freedom. The first ones are closely related to the center of mass motion of each ion, whe ...
EJP_NewCurr_Kohnle - St Andrews Research Repository
... The resources are aimed at students in their first year of a physics degree at a UK university, and more widely at all students studying introductory quantum mechanics and instructors teaching at this level. Given its flexibility, the resource can also support students studying more advanced quantu ...
... The resources are aimed at students in their first year of a physics degree at a UK university, and more widely at all students studying introductory quantum mechanics and instructors teaching at this level. Given its flexibility, the resource can also support students studying more advanced quantu ...
Semiconductor qubits for quantum computation
... 3. Long decoherence times, longer than the gate operation time • Decoherence time: 104-105 x “clock time” • Then error-correction can be successful 4. A universal set of quantum gates (CNOT) 5. Qubit read-out measurement ...
... 3. Long decoherence times, longer than the gate operation time • Decoherence time: 104-105 x “clock time” • Then error-correction can be successful 4. A universal set of quantum gates (CNOT) 5. Qubit read-out measurement ...
Working Group "Young DPG" Arbeitsgruppe junge DPG (AGjDPG
... Traditionally, physics has focused on understanding the stable phases of matter like superconductivity or magnetism. Particle like states, dominating the low-energy physics of such systems, so-called elementary excitations, have been studied extensively in the past century and play an important role ...
... Traditionally, physics has focused on understanding the stable phases of matter like superconductivity or magnetism. Particle like states, dominating the low-energy physics of such systems, so-called elementary excitations, have been studied extensively in the past century and play an important role ...
Four-photon orbital angular momentum entanglement
... matched simultaneously. In contrast to experiments on polarization entanglement, here, even small misalignment does not only reduce count rates but also alters the measurement projectors by inducing small rotations in the respective single-particle Hilbert space, and the 4-fold mode-matching exponen ...
... matched simultaneously. In contrast to experiments on polarization entanglement, here, even small misalignment does not only reduce count rates but also alters the measurement projectors by inducing small rotations in the respective single-particle Hilbert space, and the 4-fold mode-matching exponen ...
QUANTUM CRYPTOGRAPHY: PITFALLS AND ASSETS
... Section II and section III describes the classical cryptography and quantum cryptography .Sections IV, V, talks about the advantages and limitations of quantum cryptography respectively. Section VI gives the conclusion of the paper which is followed by references in sections VII. ...
... Section II and section III describes the classical cryptography and quantum cryptography .Sections IV, V, talks about the advantages and limitations of quantum cryptography respectively. Section VI gives the conclusion of the paper which is followed by references in sections VII. ...
new connections between quantum and classical equations
... characteristic surfaces and curves, denoted, respectively, by Σ and C, are solutions of the HamiltonJacobi equations, written for the same system, in the case of multidimensional stationary systems. The Σ surfaces, which have the significance of wave surfaces, and the C curves, which are their norma ...
... characteristic surfaces and curves, denoted, respectively, by Σ and C, are solutions of the HamiltonJacobi equations, written for the same system, in the case of multidimensional stationary systems. The Σ surfaces, which have the significance of wave surfaces, and the C curves, which are their norma ...
are WAVES. PARTICLES!
... The issue is not whether or not humans have information from a measurement. The issue is whether or not the information exists! ...
... The issue is not whether or not humans have information from a measurement. The issue is whether or not the information exists! ...
Quantum Criticality and Black Holes
... Observation of 3 → 2 low energy modes, emergence of new longitudinal mode in Néel phase, and vanishing of Néel temperature at the quantum critical point ...
... Observation of 3 → 2 low energy modes, emergence of new longitudinal mode in Néel phase, and vanishing of Néel temperature at the quantum critical point ...
Transport properties of quantum-classical systems
... examine its structure, in Sec. III we consider a single harmonic oscillator in thermal equilibrium for which this function can be analytically determined. In Sec. IV we employ the results of Ref. 14 to take the quantum-classical limit of the evolution equation for the spectral density and use this e ...
... examine its structure, in Sec. III we consider a single harmonic oscillator in thermal equilibrium for which this function can be analytically determined. In Sec. IV we employ the results of Ref. 14 to take the quantum-classical limit of the evolution equation for the spectral density and use this e ...