publ_4 - OPEN-ADAS
... The world energy problem is highly debated subject (Nuclear Power: Keeping the Options Open, 2003), with various solutions put forward as a solution. This report is concerned with aspects of the magnetic confinement approach to fusion as a long-term solution. In this approach, deuterium and tritium ...
... The world energy problem is highly debated subject (Nuclear Power: Keeping the Options Open, 2003), with various solutions put forward as a solution. This report is concerned with aspects of the magnetic confinement approach to fusion as a long-term solution. In this approach, deuterium and tritium ...
Quantum Mechanics as Quantum Information (and only a little more)
... of an observer. In this light, the program of trying to develop general relativity boiled down to recognizing all the things within gravitational and motional phenomena that should be viewed as consequences of our coordinate choices. It was in identifying all the things that are “numerically additio ...
... of an observer. In this light, the program of trying to develop general relativity boiled down to recognizing all the things within gravitational and motional phenomena that should be viewed as consequences of our coordinate choices. It was in identifying all the things that are “numerically additio ...
Codes and designs for quantum error correction
... iterative decoding are called low-density parity-check (LDPC) codes. In this section we give a brief summary of how combinatorial designs have been applied to LDPC codes in the context of quantum error correction assisted by less noisy qubits. The Tanner graph of an parity-check matrix is the bipart ...
... iterative decoding are called low-density parity-check (LDPC) codes. In this section we give a brief summary of how combinatorial designs have been applied to LDPC codes in the context of quantum error correction assisted by less noisy qubits. The Tanner graph of an parity-check matrix is the bipart ...
Quantum Mechanics as Quantum Information
... of an observer. In this light, the program of trying to develop general relativity boiled down to recognizing all the things within gravitational and motional phenomena that should be viewed as consequences of our coordinate choices. It was in identifying all the things that are “numerically additio ...
... of an observer. In this light, the program of trying to develop general relativity boiled down to recognizing all the things within gravitational and motional phenomena that should be viewed as consequences of our coordinate choices. It was in identifying all the things that are “numerically additio ...
UNRAVELING OPEN QUANTUM SYSTEMS: CLASSICAL
... in much older abstract results like the characterization of completely positive maps due to Stinespring (see [28]). Indeed, complete positivity contains a deep probabilistic notion expressed in the language of operator algebras. In many respects it is the core of mathematical properties of (regular ...
... in much older abstract results like the characterization of completely positive maps due to Stinespring (see [28]). Indeed, complete positivity contains a deep probabilistic notion expressed in the language of operator algebras. In many respects it is the core of mathematical properties of (regular ...
PDF: Aspden et al 2016 b
... trajectory). Such a photon cannot exist, as the uncertainty principle requires us to modify these mental models. Yet these notions are so widespread that they have led to suggestions that physicists ought to receive special training and a license before being allowed to use the word “photon.”1 Such ...
... trajectory). Such a photon cannot exist, as the uncertainty principle requires us to modify these mental models. Yet these notions are so widespread that they have led to suggestions that physicists ought to receive special training and a license before being allowed to use the word “photon.”1 Such ...
Variational approach to the Davydov soliton
... There are two different components of Davydov's theory of soliton transport in one-dimensional coupled exciton phonon systems. The first is the form of the wave function (either ~Di & or ~Dz &); the second is the set of equations describing the time evolution of these wave functions. In the present ...
... There are two different components of Davydov's theory of soliton transport in one-dimensional coupled exciton phonon systems. The first is the form of the wave function (either ~Di & or ~Dz &); the second is the set of equations describing the time evolution of these wave functions. In the present ...
Plane Waves and Wave Propagation
... If we map out the path traced by the tip of this vector in the space of ²1 and ²2 , we find in general an ellipse. The ellipse is characterized by two parameters, equivalent to α2 /α1 and φ, these being its eccentricity (the ratio of the semi-minor to the semimajor axis) and the amount by which the ...
... If we map out the path traced by the tip of this vector in the space of ²1 and ²2 , we find in general an ellipse. The ellipse is characterized by two parameters, equivalent to α2 /α1 and φ, these being its eccentricity (the ratio of the semi-minor to the semimajor axis) and the amount by which the ...
Postprint
... However, they differ in the analysis used to determine the time-delays and in the range of IR laser intensity. The motivation of the present paper is to present an unified theoretical analysis of these processes. To achieve this goal, we shall expose first the theoretical background which has conduc ...
... However, they differ in the analysis used to determine the time-delays and in the range of IR laser intensity. The motivation of the present paper is to present an unified theoretical analysis of these processes. To achieve this goal, we shall expose first the theoretical background which has conduc ...
Communications: Entanglement switch for dipole arrays
... All other dipole-dipole coupling constants ⍀i,j⫽i⫾1 can be expressed in terms of ⍀. Thus, we have two parameters to vary, the ratio / ⍀ and temperature kT. At kT ⬃ 0 one has a constant entanglement over a long ratio / ⍀ and sharp transitions or jumps to lower values at other values of / ⍀. It ...
... All other dipole-dipole coupling constants ⍀i,j⫽i⫾1 can be expressed in terms of ⍀. Thus, we have two parameters to vary, the ratio / ⍀ and temperature kT. At kT ⬃ 0 one has a constant entanglement over a long ratio / ⍀ and sharp transitions or jumps to lower values at other values of / ⍀. It ...
7th Workshop on Quantum Chaos and Localisation Phenomena
... a smooth term plus a sum over contributions associated to solutions of the nonlinear Schr¨odinger equation. Our formula applies to bosonic systems with discrete sites, such as the Bose–Hubbard model, in the semiclassical limit as well as in the limit where the number of particles is taken to infinit ...
... a smooth term plus a sum over contributions associated to solutions of the nonlinear Schr¨odinger equation. Our formula applies to bosonic systems with discrete sites, such as the Bose–Hubbard model, in the semiclassical limit as well as in the limit where the number of particles is taken to infinit ...
Physical Entanglement in Permutation
... What does it mean to “impose” permutation invariance? Isn’t it rather that permutation invariance holds of some operators and not others? I propose to impose permutation invariance means to lay it down as a necessary condition on any operator’s receiving a physical interpretation. This justifies, an ...
... What does it mean to “impose” permutation invariance? Isn’t it rather that permutation invariance holds of some operators and not others? I propose to impose permutation invariance means to lay it down as a necessary condition on any operator’s receiving a physical interpretation. This justifies, an ...
Quasiparticles in the Quantum Hall Effect Janik Kailasvuori Stockholm University
... insight into physics is of such a completely different caliber than mine. The good care they take of their students contributes to making their little subgroup with my fellow students and roommates Emil JohanssonBergholtz, Maria Hermanns and our newcomer Emma Wikberg such a relaxed, generous and sti ...
... insight into physics is of such a completely different caliber than mine. The good care they take of their students contributes to making their little subgroup with my fellow students and roommates Emil JohanssonBergholtz, Maria Hermanns and our newcomer Emma Wikberg such a relaxed, generous and sti ...
Quantum analogue computing
... our models are good, and hence we understand at some level how the system works. We may then use our computer simulations to predict things we have not yet observed, or provide more details of processes that are hard to observe by experiment. That computation of any sort works in a useful way is not ...
... our models are good, and hence we understand at some level how the system works. We may then use our computer simulations to predict things we have not yet observed, or provide more details of processes that are hard to observe by experiment. That computation of any sort works in a useful way is not ...
Probability amplitude
In quantum mechanics, a probability amplitude is a complex number used in describing the behaviour of systems. The modulus squared of this quantity represents a probability or probability density.Probability amplitudes provide a relationship between the wave function (or, more generally, of a quantum state vector) of a system and the results of observations of that system, a link first proposed by Max Born. Interpretation of values of a wave function as the probability amplitude is a pillar of the Copenhagen interpretation of quantum mechanics. In fact, the properties of the space of wave functions were being used to make physical predictions (such as emissions from atoms being at certain discrete energies) before any physical interpretation of a particular function was offered. Born was awarded half of the 1954 Nobel Prize in Physics for this understanding (see #References), and the probability thus calculated is sometimes called the ""Born probability"". These probabilistic concepts, namely the probability density and quantum measurements, were vigorously contested at the time by the original physicists working on the theory, such as Schrödinger and Einstein. It is the source of the mysterious consequences and philosophical difficulties in the interpretations of quantum mechanics—topics that continue to be debated even today.