arXiv:gr-qc/9901024 v1 8 Jan 1999 - Philsci
... atic. As we shall see in Section 2, the general notion of emergence is vague, and contentious. And once we settle on some such notion, there is a wide and disparate range of quantum gravity programmes to consider. Furthermore, most of these programmes face hard conceptual problems (as well as techn ...
... atic. As we shall see in Section 2, the general notion of emergence is vague, and contentious. And once we settle on some such notion, there is a wide and disparate range of quantum gravity programmes to consider. Furthermore, most of these programmes face hard conceptual problems (as well as techn ...
SOME CONVEXITY AND SUBADDITIVITY
... define the analogue of the Kolmogorov-Sinai entropy. In other words, it is not clear how to give an unambiguous definition of the density matrix to use in (6). We shall say no more about ergodic theory in this lecture. III. Properties of entropy (one space). We turn now to a study of some properties ...
... define the analogue of the Kolmogorov-Sinai entropy. In other words, it is not clear how to give an unambiguous definition of the density matrix to use in (6). We shall say no more about ergodic theory in this lecture. III. Properties of entropy (one space). We turn now to a study of some properties ...
Universalization as a physical guiding principle
... the mechanics that leads to the basic quantum principle and consequently to the quantum world. The quantum principle is universal and hence according to our general belief and the guiding principle, it should be expressible as a property of spacetime. This has unfortunately not happened despite the ...
... the mechanics that leads to the basic quantum principle and consequently to the quantum world. The quantum principle is universal and hence according to our general belief and the guiding principle, it should be expressible as a property of spacetime. This has unfortunately not happened despite the ...
Squeezed spin states
... studied in boson systems [1]. A radiation field is said to be squeezed if the uncertainty of one quadrature amplitude (Aa, ) is smaller than the standard quantum limit correlations between (SQL) of 4. Quantum-mechanical photons established through nonlinear interactions play an essential role in the ...
... studied in boson systems [1]. A radiation field is said to be squeezed if the uncertainty of one quadrature amplitude (Aa, ) is smaller than the standard quantum limit correlations between (SQL) of 4. Quantum-mechanical photons established through nonlinear interactions play an essential role in the ...
How “Quantum” is the D-Wave Machine?
... is quite natural, and it replaces each spin in the D-Wave machine with a magnet pointing in some direction in the XZ plane. Each magnet is subject to both an external magnetic field as well as dipole-dipole couplings due to interactions with nearest neighbors on the so-called Chimera graph. The exte ...
... is quite natural, and it replaces each spin in the D-Wave machine with a magnet pointing in some direction in the XZ plane. Each magnet is subject to both an external magnetic field as well as dipole-dipole couplings due to interactions with nearest neighbors on the so-called Chimera graph. The exte ...
Creation and Destruction Operators and Coherent States
... by any system which can be represented in terms of a harmonic oscillator, or sums of harmonic oscillators. They are the answer to the question, what is the state of a quantum oscillator when it is behaving as classically as possible? As a practical example,the state of photons in a laser is quantum ...
... by any system which can be represented in terms of a harmonic oscillator, or sums of harmonic oscillators. They are the answer to the question, what is the state of a quantum oscillator when it is behaving as classically as possible? As a practical example,the state of photons in a laser is quantum ...
Title Robustness of quantum spin Hall effect in an external magnetic
... has a bulk gap between the conduction and valence bands meanwhile processing a pair of gapless helical edge states surrounding the boundaries [5–7]. The gapless helical edge states give rise to a quantized conductance in a two-terminal measurement, which has been observed experimentally in HgTe/CdTe ...
... has a bulk gap between the conduction and valence bands meanwhile processing a pair of gapless helical edge states surrounding the boundaries [5–7]. The gapless helical edge states give rise to a quantized conductance in a two-terminal measurement, which has been observed experimentally in HgTe/CdTe ...
Antiresonance and interaction-induced localization in spin and qubit chains with defects
... It is of the order of the LDP bandwidth J . The localized state exists for |α| > 1/2. The reciprocal localization length Im θ2 = ln(2|α|) goes to zero as |α| → 1/2. As the BP band goes through the LDP band with varying J − g, the localized state first merges with the LDP band and disappears for α ...
... It is of the order of the LDP bandwidth J . The localized state exists for |α| > 1/2. The reciprocal localization length Im θ2 = ln(2|α|) goes to zero as |α| → 1/2. As the BP band goes through the LDP band with varying J − g, the localized state first merges with the LDP band and disappears for α ...
Presentism and Quantum Gravity
... foliation (Goldstein and Teufel 2001, 284); and there are more radical approaches as well (such as the general ether theory of Schmelzer 2001). Fixed foliation quantum gravity is compatible with presentism. To show this, it will be helpful to utilize the semantic view of scientific theories (see fo ...
... foliation (Goldstein and Teufel 2001, 284); and there are more radical approaches as well (such as the general ether theory of Schmelzer 2001). Fixed foliation quantum gravity is compatible with presentism. To show this, it will be helpful to utilize the semantic view of scientific theories (see fo ...
Creation of entangled states in coupled quantum dots via adiabatic... C. Creatore, R. T. Brierley, R. T. Phillips,
... To simplify the notation we consider a limit in which there are only two relevant states, a ground state and a one exciton state, for each dot. The generalization to more complex level structures, such as those arising from the exciton spin, is straightforward. We represent the states of each dot in ...
... To simplify the notation we consider a limit in which there are only two relevant states, a ground state and a one exciton state, for each dot. The generalization to more complex level structures, such as those arising from the exciton spin, is straightforward. We represent the states of each dot in ...
Quantum mechanical modeling of the CNOT (XOR) gate
... To this end, for an isolated quantum (”microscopic”) system it is practicaly a matter of principle that its Hamiltonian has at least one group of the global symmetry. [E.g., for an EPR pair, there is the full (e.g., rotational) symmetry of the ”pair”. In the collission processes it is both theoretic ...
... To this end, for an isolated quantum (”microscopic”) system it is practicaly a matter of principle that its Hamiltonian has at least one group of the global symmetry. [E.g., for an EPR pair, there is the full (e.g., rotational) symmetry of the ”pair”. In the collission processes it is both theoretic ...
Joule–Thomson coefficients of quantum ideal
... behaviour approaches that of an ideal gas at high temperatures. On the other hand, BJT and |FJT| increase with decreasing temperature. This situation results from the increment in quantum exchange force between the identical particles. These forces are attractive for Bose particles and repulsive f ...
... behaviour approaches that of an ideal gas at high temperatures. On the other hand, BJT and |FJT| increase with decreasing temperature. This situation results from the increment in quantum exchange force between the identical particles. These forces are attractive for Bose particles and repulsive f ...
D047042023
... computations can be reverted (i.e. the inputs can be obtained from the outputs and vice versa) by using reversible logic. This reversibility plays significant role for emerging technologies that may replace or at least enhance the traditional computer chip efficiency. Power dissipation and heat gene ...
... computations can be reverted (i.e. the inputs can be obtained from the outputs and vice versa) by using reversible logic. This reversibility plays significant role for emerging technologies that may replace or at least enhance the traditional computer chip efficiency. Power dissipation and heat gene ...
Quantum statistics: Is there an effective fermion repulsion or boson
... concept has been with physics since the early days of quantum mechanics. Nevertheless, it is important to examine the usefulness of this heuristic interpretation of the mathematics. As Layzer has pointed out, no such interpretation can carry the whole weight of the rigorous mathematical formulation; ...
... concept has been with physics since the early days of quantum mechanics. Nevertheless, it is important to examine the usefulness of this heuristic interpretation of the mathematics. As Layzer has pointed out, no such interpretation can carry the whole weight of the rigorous mathematical formulation; ...
The New Metaphysics and the Deep Structure of Creativity
... useful to distinguish three forms: 'pre-scientific', 'reductionist', and 'anthropic'. Pre-scientific metaphysics was generally based on incorrect assumptions about the physical world, and is hence excluded from this paper. Reductionist metaphysics include speculations on Newtonian and Darwinian scie ...
... useful to distinguish three forms: 'pre-scientific', 'reductionist', and 'anthropic'. Pre-scientific metaphysics was generally based on incorrect assumptions about the physical world, and is hence excluded from this paper. Reductionist metaphysics include speculations on Newtonian and Darwinian scie ...
The Age of Entanglement Quantum Computing the (Formerly) Uncomputable
... continue the experiment, the plate may look like Fig. 9.2b. Now, there are the beginnings of a pattern, but it is still rough. However, after continuing for a longer time, the photoplate looks like Fig.9.2c. In this case, the interference bands are easily visible and begin to look like the bands of ...
... continue the experiment, the plate may look like Fig. 9.2b. Now, there are the beginnings of a pattern, but it is still rough. However, after continuing for a longer time, the photoplate looks like Fig.9.2c. In this case, the interference bands are easily visible and begin to look like the bands of ...
Wave-Particle Duality in the Elastodynamics of the Spacetime
... that it bears strong connections to other, well-established theories—both quantum and classical—such as photodetection theory, classical and quantum optical coherence theory, and the biphoton amplitude, which is used in most discussions of spontaneous parametric down conversion”. Hence, we have to c ...
... that it bears strong connections to other, well-established theories—both quantum and classical—such as photodetection theory, classical and quantum optical coherence theory, and the biphoton amplitude, which is used in most discussions of spontaneous parametric down conversion”. Hence, we have to c ...