Cooling of a small sample of Bose atoms with accidental... Maciej Lewenstein , J. Ignacio Cirac , and Luis Santos
... quasi-degenerated. We expect that a cooled atomic sample in such a harmonic microtrap will exhibit the effects of accidental quasi-degeneracy regardless of the method used for its cooling In order to stress this general aspect of our study, we adopt here partially the statistical physics approach, a ...
... quasi-degenerated. We expect that a cooled atomic sample in such a harmonic microtrap will exhibit the effects of accidental quasi-degeneracy regardless of the method used for its cooling In order to stress this general aspect of our study, we adopt here partially the statistical physics approach, a ...
Cooling and Trapping Neutral Atoms—W. Ketterle, D.E. Pritchard
... at t =0 when the second beam is turned on. The relative depth of the two wells was different for the three traces, generating a difference in the beat frequency between the two condensates. ...
... at t =0 when the second beam is turned on. The relative depth of the two wells was different for the three traces, generating a difference in the beat frequency between the two condensates. ...
The Emergence of a Coupled Quantum Dot Array in a Doped Silicon
... Introduction and Experimental Background Sufficiently small (<100 nm) particles can exhibit charge quantization-like natural atoms. Such “artificial atom”1,2 finite fermion systems are often called quantum dots (QDs), referring to the quantum confinement in all three spatial dimensions. The charge t ...
... Introduction and Experimental Background Sufficiently small (<100 nm) particles can exhibit charge quantization-like natural atoms. Such “artificial atom”1,2 finite fermion systems are often called quantum dots (QDs), referring to the quantum confinement in all three spatial dimensions. The charge t ...
Physica E 6, 72 - Physics@Technion
... everpresent in QHE states — it exists even in the compressible half- lled state [7], for which an explicit wave function has been proposed by Read and Rezayi (RR) [8,9]. The question arises whether its manifestations, in terms of the above-mentioned correlations, survive in more general quantum Hall ...
... everpresent in QHE states — it exists even in the compressible half- lled state [7], for which an explicit wave function has been proposed by Read and Rezayi (RR) [8,9]. The question arises whether its manifestations, in terms of the above-mentioned correlations, survive in more general quantum Hall ...
Application of Hartree-Fock Method for Modeling of Bioactive
... when obtained the binding energy of H2 molecule with an accuracy of 98%. This calculation took a year to be done, but its success increased confidence of authors that then criticized the semiempirical method as a “happy cancellation of errors” that occurs for not taking into account “terms of consid ...
... when obtained the binding energy of H2 molecule with an accuracy of 98%. This calculation took a year to be done, but its success increased confidence of authors that then criticized the semiempirical method as a “happy cancellation of errors” that occurs for not taking into account “terms of consid ...
The effect of Kondo correlations on the absorption spectrum of
... fabricate quantum dots with atom-like electronic structures, opening new possibilities to study the Kondo effect experimentally, see [5]. Using these artificial atoms as magnetic impurities, today it is possible to control important parameters in experiments. E.g., the number and energy of electrons ...
... fabricate quantum dots with atom-like electronic structures, opening new possibilities to study the Kondo effect experimentally, see [5]. Using these artificial atoms as magnetic impurities, today it is possible to control important parameters in experiments. E.g., the number and energy of electrons ...
Level shifts of rubidium Rydberg states due to binary interactions
... limitation of the sum in Eq. 共3兲 does not change the calculated van der Waals shifts by more than about 1%. By restricting the sum in the described way, we find that typically of the order of hundreds of two-particle states 兩n⬘ , ᐉ⬘ , j⬘ , m⬘j 典 丢 兩n⬙ , ᐉ⬙ , j⬙ , m⬙j 典 still contribute, although the ...
... limitation of the sum in Eq. 共3兲 does not change the calculated van der Waals shifts by more than about 1%. By restricting the sum in the described way, we find that typically of the order of hundreds of two-particle states 兩n⬘ , ᐉ⬘ , j⬘ , m⬘j 典 丢 兩n⬙ , ᐉ⬙ , j⬙ , m⬙j 典 still contribute, although the ...
high-temperature superconductivity from short
... for electron doping, the interaction strength U is about 6t (where 8t is the bandwidth) which is below the value necessary to drive a strong Mott transition. The system can still be an insulator at half-filling above the Néel temperature because of fluctuating antiferromagnetism in two dimensions [9 ...
... for electron doping, the interaction strength U is about 6t (where 8t is the bandwidth) which is below the value necessary to drive a strong Mott transition. The system can still be an insulator at half-filling above the Néel temperature because of fluctuating antiferromagnetism in two dimensions [9 ...
Dephasing of electrons in mesoscopic metal wires * F. Pierre, A. B. Gougam,
... These parameters being determined, L remains as the only fit parameter for each magnetoresistance curve. Examples of fits are displayed as solid lines in Fig. 2. In order to get from L , the diffusion coefficient D was determined using the measured geometrical and electrical sample character ...
... These parameters being determined, L remains as the only fit parameter for each magnetoresistance curve. Examples of fits are displayed as solid lines in Fig. 2. In order to get from L , the diffusion coefficient D was determined using the measured geometrical and electrical sample character ...
Theoretical Investigations Regarding Single Molecules
... system of electrons kept together by attractive forces from the nucleus; the total negative charge of the electrons is equal to the positive charge of the nucleus. N. Bohr11 So begins the famous paper on the quantum theory of atoms published by Niels Bohr exactly a century ago this year. Bohr assert ...
... system of electrons kept together by attractive forces from the nucleus; the total negative charge of the electrons is equal to the positive charge of the nucleus. N. Bohr11 So begins the famous paper on the quantum theory of atoms published by Niels Bohr exactly a century ago this year. Bohr assert ...
Cavity cooling of a single atom
... [3] F. Bernardot, P. Nussenzveig, M. Brune, J. M. Raimond and S. Haroche “Vacuum Rabi Splitting Observed on a Microscopic Atomic Sample in a Microwave Cavity” Europhys. Lett. 17 33-38 (1992) [4] P. Horak and H. Ritsch “Dissipative dynamics of Bose condensates in optical cavities” Phys. Rev. A 63, 02 ...
... [3] F. Bernardot, P. Nussenzveig, M. Brune, J. M. Raimond and S. Haroche “Vacuum Rabi Splitting Observed on a Microscopic Atomic Sample in a Microwave Cavity” Europhys. Lett. 17 33-38 (1992) [4] P. Horak and H. Ritsch “Dissipative dynamics of Bose condensates in optical cavities” Phys. Rev. A 63, 02 ...
CHE 110 Dr. Nicholas Bizier Office DS 337b email
... Lysine is an amino acid which has the following elemental composition: C, H, O, N. In one experiment, 2.175 g of lysine was combusted to produce 3.94 g of CO2 and 1.89 g H2O. In a separate experiment, 1.873 g of lysine was burned to produce 0.436 g of NH2. The molar mass of lysine is 150 g/mol. Dete ...
... Lysine is an amino acid which has the following elemental composition: C, H, O, N. In one experiment, 2.175 g of lysine was combusted to produce 3.94 g of CO2 and 1.89 g H2O. In a separate experiment, 1.873 g of lysine was burned to produce 0.436 g of NH2. The molar mass of lysine is 150 g/mol. Dete ...
Document
... V兲, and the pulsed extraction voltage 共typically 500–700 V subtracted from the extraction grid voltage兲, it was possible to not only space-focus the ions but also to adjust the residual field that was present prior to the extraction pulse. The resolution (m/⌬m) of the TOF-MS was about 300, far more ...
... V兲, and the pulsed extraction voltage 共typically 500–700 V subtracted from the extraction grid voltage兲, it was possible to not only space-focus the ions but also to adjust the residual field that was present prior to the extraction pulse. The resolution (m/⌬m) of the TOF-MS was about 300, far more ...
Magnetotransport in 2DEG
... In classical mechanics, any size of the orbit is allowed. Magnetotransport in 2DEG ...
... In classical mechanics, any size of the orbit is allowed. Magnetotransport in 2DEG ...
Bohr model
In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with attraction provided by electrostatic forces rather than gravity. After the cubic model (1902), the plum-pudding model (1904), the Saturnian model (1904), and the Rutherford model (1911) came the Rutherford–Bohr model or just Bohr model for short (1913). The improvement to the Rutherford model is mostly a quantum physical interpretation of it. The Bohr model has been superseded, but the quantum theory remains sound.The model's key success lay in explaining the Rydberg formula for the spectral emission lines of atomic hydrogen. While the Rydberg formula had been known experimentally, it did not gain a theoretical underpinning until the Bohr model was introduced. Not only did the Bohr model explain the reason for the structure of the Rydberg formula, it also provided a justification for its empirical results in terms of fundamental physical constants.The Bohr model is a relatively primitive model of the hydrogen atom, compared to the valence shell atom. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader and much more accurate quantum mechanics and thus may be considered to be an obsolete scientific theory. However, because of its simplicity, and its correct results for selected systems (see below for application), the Bohr model is still commonly taught to introduce students to quantum mechanics or energy level diagrams before moving on to the more accurate, but more complex, valence shell atom. A related model was originally proposed by Arthur Erich Haas in 1910, but was rejected. The quantum theory of the period between Planck's discovery of the quantum (1900) and the advent of a full-blown quantum mechanics (1925) is often referred to as the old quantum theory.