Continuous Time Quantum Monte Carlo method for fermions
... grows faster than the numerator. In our calculations for the non-Hamiltonian systems we also did not observe any indications of the divergence. The crucial point of the proof is the finiteness of the number of states in the system. This is a particular peculiarity of fermions. For bosons, on other h ...
... grows faster than the numerator. In our calculations for the non-Hamiltonian systems we also did not observe any indications of the divergence. The crucial point of the proof is the finiteness of the number of states in the system. This is a particular peculiarity of fermions. For bosons, on other h ...
Problems, Puzzles and Prospects: A Personal Perspective on
... In fact, supergravity doesn't solve problem i), but instead relates gravity to yet other forces which, while definitely not the forces we know from particle physics, might be responsible for our familiar forces. Maybe. Regarding 2), even the most optimistic superenthusiasts expect that all known sup ...
... In fact, supergravity doesn't solve problem i), but instead relates gravity to yet other forces which, while definitely not the forces we know from particle physics, might be responsible for our familiar forces. Maybe. Regarding 2), even the most optimistic superenthusiasts expect that all known sup ...
On the Energy Spectrum and Ground
... Ln|2s2 − s1 |. At s1 = s2 = 1/2 the exact ground state of (1) has a spin wave structure [4] (spin densities on neighboring lattice sites have opposite signs). 3. Discussion It is known that the next-nearest neighbor interactions (frustration) may enhance the quantum spin fluctuation and suppress the ...
... Ln|2s2 − s1 |. At s1 = s2 = 1/2 the exact ground state of (1) has a spin wave structure [4] (spin densities on neighboring lattice sites have opposite signs). 3. Discussion It is known that the next-nearest neighbor interactions (frustration) may enhance the quantum spin fluctuation and suppress the ...
Quantum kinetic theory for a condensed bosonic gas
... operator. In the limit of weakly interacting, dilute quantum gases where strong collisional interaction events are well separated in time, it is possible to solve this equation perturbatively and establish a hierarchy in terms of an expansion parameter proportional to this interaction strength. Once ...
... operator. In the limit of weakly interacting, dilute quantum gases where strong collisional interaction events are well separated in time, it is possible to solve this equation perturbatively and establish a hierarchy in terms of an expansion parameter proportional to this interaction strength. Once ...
Electronic structure of rectangular quantum dots
... and adjustments in the model potential have made the agreement even more precise 共see Ref. 2 for a review兲. Deviations from parabolic confinement have most commonly been studied in connection with the far-infrared response 共FIR兲.3–7 This is due to the generalized Kohn’s theorem,8,9 stating that FIR ...
... and adjustments in the model potential have made the agreement even more precise 共see Ref. 2 for a review兲. Deviations from parabolic confinement have most commonly been studied in connection with the far-infrared response 共FIR兲.3–7 This is due to the generalized Kohn’s theorem,8,9 stating that FIR ...
What is absolutely continuous spectrum?
... Figure 1: A finite sample of length L coupled to two electronic reservoirs the absolutely continuous (ac) spectrum of a quantum Hamiltonian is the set of energies at which the described physical system exhibits transport. Much effort has been devoted to the investigation of this heuristic; so far ma ...
... Figure 1: A finite sample of length L coupled to two electronic reservoirs the absolutely continuous (ac) spectrum of a quantum Hamiltonian is the set of energies at which the described physical system exhibits transport. Much effort has been devoted to the investigation of this heuristic; so far ma ...
Introduction to quantum statistical thermodynamics by Armen
... In contrast to entropy, the concept of work has a well-defined operational meaning for finite systems interacting with macroscopic work sources [5]. It is, perhaps, not accidental that Thomson’s formulation of the second law [4–6] — no work can be extracted from an equilibrium system by means of a cyc ...
... In contrast to entropy, the concept of work has a well-defined operational meaning for finite systems interacting with macroscopic work sources [5]. It is, perhaps, not accidental that Thomson’s formulation of the second law [4–6] — no work can be extracted from an equilibrium system by means of a cyc ...
Interference Energy Spectrum of the Infinite Square Well
... A wavefunction that contains a region of superoscillation turns out to be a special case of this phenomenon, wherein very particular superposition states have transient zeros that remain stable for extended durations [4]. Because of the stability of these zeros, barriers can be raised very slowly, a ...
... A wavefunction that contains a region of superoscillation turns out to be a special case of this phenomenon, wherein very particular superposition states have transient zeros that remain stable for extended durations [4]. Because of the stability of these zeros, barriers can be raised very slowly, a ...
On-site correlations in optical lattices: Band mixing
... provide a close connection between solid-state systems and atomic physics [1]. The models used to describe these systems generally assume that each lattice site’s wave function is easily built up from single-particle states [2]. Here we argue that this approximation is inappropriate for quantitative ...
... provide a close connection between solid-state systems and atomic physics [1]. The models used to describe these systems generally assume that each lattice site’s wave function is easily built up from single-particle states [2]. Here we argue that this approximation is inappropriate for quantitative ...