COMPUTING QUANTUM PHASE TRANSITIONS PREAMBLE
... direction of the ferromagnet induces quantum fluctuations between the spin-up and spin-down states and thus reduces the transition temperature. At a field strength of about 50 kOe, the transition temperature drops to zero. Thus, at 50 kOe LiHoF4 undergoes a quantum phase transition from a ferromagne ...
... direction of the ferromagnet induces quantum fluctuations between the spin-up and spin-down states and thus reduces the transition temperature. At a field strength of about 50 kOe, the transition temperature drops to zero. Thus, at 50 kOe LiHoF4 undergoes a quantum phase transition from a ferromagne ...
Trapping and cooling rubidium atoms for quantum information
... (Λ = 2·π ·m·k·T ) of neighboring atoms is large enough they start to overlap and interfere. A large single wave function of the whole ensemble builds up, essentially leaving all the atoms in a precisely defined, macroscopic collective quantum state. The discovery of micro- and nano-Kelvin samples of ...
... (Λ = 2·π ·m·k·T ) of neighboring atoms is large enough they start to overlap and interfere. A large single wave function of the whole ensemble builds up, essentially leaving all the atoms in a precisely defined, macroscopic collective quantum state. The discovery of micro- and nano-Kelvin samples of ...
Anisotropy of Elastic Behavior
... • The 21 independent elastic constants can be reduced still further by considering the symmetry conditions found in different crystal structures. • In Isotropic case, the elastic constants are reduced from 21 to 2. • Different crystal systems can be characterized exclusively by their symmetries. Ta ...
... • The 21 independent elastic constants can be reduced still further by considering the symmetry conditions found in different crystal structures. • In Isotropic case, the elastic constants are reduced from 21 to 2. • Different crystal systems can be characterized exclusively by their symmetries. Ta ...
Controlled Coupling and Occupation of Silicon Atomic Quantum Dots
... rectangular arrangement. The most widely separated DBs in the group of four DBs (DB2 and DB4) are darkest in appearance. Note that DB2 was initially brighter than DBs 1 and 3 in Fig. 4a, then became darker than DBs 1 and 3 in Fig. 4b. It is apparent that the extra electrons in this structure are pre ...
... rectangular arrangement. The most widely separated DBs in the group of four DBs (DB2 and DB4) are darkest in appearance. Note that DB2 was initially brighter than DBs 1 and 3 in Fig. 4a, then became darker than DBs 1 and 3 in Fig. 4b. It is apparent that the extra electrons in this structure are pre ...
Annals of Physics Classical impurities and boundary Majorana zero
... state in the ordered phase of the QIC. It is worth mentioning that the usefulness of the Majorana fermions in the QIC hinges on the exact Z2 symmetry of the spin model (2). Local terms (in the x or y ) which break the Ising symmetry induce non-local couplings among the Majoranas and spoil the degene ...
... state in the ordered phase of the QIC. It is worth mentioning that the usefulness of the Majorana fermions in the QIC hinges on the exact Z2 symmetry of the spin model (2). Local terms (in the x or y ) which break the Ising symmetry induce non-local couplings among the Majoranas and spoil the degene ...
Heisenberg Spin Chains : from Quantum Groups to
... where, Ei , Pi and Eg , Pg are the energy and momentum eigenvalues of the states | ψi i and of the groundstate | ψg i respectively. This amounts again to be able to act with local operators on eigenstates, to compute the resulting scalar products, and finally to perform the above sum containing in t ...
... where, Ei , Pi and Eg , Pg are the energy and momentum eigenvalues of the states | ψi i and of the groundstate | ψg i respectively. This amounts again to be able to act with local operators on eigenstates, to compute the resulting scalar products, and finally to perform the above sum containing in t ...
Orthogonal metals: The simplest non-Fermi liquids
... other discrete variable, for instance, a Zn rather than Ising, degree of freedom. In that case, the gauge redundancy is also Zn and the corresponding orthogonal metal is obtained when the slave spins are disordered, the fermions form a gapless Fermi surface, and the Zn gauge fields are gapped. For mo ...
... other discrete variable, for instance, a Zn rather than Ising, degree of freedom. In that case, the gauge redundancy is also Zn and the corresponding orthogonal metal is obtained when the slave spins are disordered, the fermions form a gapless Fermi surface, and the Zn gauge fields are gapped. For mo ...
Edge-mode superconductivity in a two
... perpendicular magnetic field, Bz, and source-drain current bias, Isd, for several bottom and top gates settings (device A). a, For (Vbg, Vtg) = (0, 4.8) V the device has a normal state resistance RN~900 Ω, an intermediate value between the deep electron regime and the charge neutrality point. The co ...
... perpendicular magnetic field, Bz, and source-drain current bias, Isd, for several bottom and top gates settings (device A). a, For (Vbg, Vtg) = (0, 4.8) V the device has a normal state resistance RN~900 Ω, an intermediate value between the deep electron regime and the charge neutrality point. The co ...
Quantum many-particle electron transport in time-dependent systems with Bohmian trajectories by Alfonso Alarc´
... The novelty of the BITLLES simulator is based on two points. First, it presents a manyparticle quantum electron transport model taking into account explicitly the Coulomb and exchange correlations among electrons using Bohmian trajectories. Second, it provides a full information of the all current d ...
... The novelty of the BITLLES simulator is based on two points. First, it presents a manyparticle quantum electron transport model taking into account explicitly the Coulomb and exchange correlations among electrons using Bohmian trajectories. Second, it provides a full information of the all current d ...
Free Energies of Cavity and Noncavity Hydrated Electrons at the
... leaving only a free-energy plateau below the interface. The freeenergy features we see in the PMF using the instantaneous interface, however, are more consistent with previously performed MD trajectories of the TB electron, which found that at low temperatures the TB electron persists in the interfa ...
... leaving only a free-energy plateau below the interface. The freeenergy features we see in the PMF using the instantaneous interface, however, are more consistent with previously performed MD trajectories of the TB electron, which found that at low temperatures the TB electron persists in the interfa ...
Picture - Weebly
... cause controversy. It is in line with a tradition which is opposed to mechanistic systems. The 1971 film A Clockwork Orange is an adaptation of Anthony Burgess’s 1962 novel of the same name. This darkly satirical science fiction film set in a dystopian future Britain follows Alex (Malcolm McDowell), ...
... cause controversy. It is in line with a tradition which is opposed to mechanistic systems. The 1971 film A Clockwork Orange is an adaptation of Anthony Burgess’s 1962 novel of the same name. This darkly satirical science fiction film set in a dystopian future Britain follows Alex (Malcolm McDowell), ...
Synthetic Quantum Systems
... two superconductors. For the latter the barrier consists of a thin insulator. However, the similarity arises from the fact that all three systems are describable within a similar model. The modes are associated with two macroscopic wave functions with an overall phase for each. These wave functions ...
... two superconductors. For the latter the barrier consists of a thin insulator. However, the similarity arises from the fact that all three systems are describable within a similar model. The modes are associated with two macroscopic wave functions with an overall phase for each. These wave functions ...
Long-time behavior of nuclear spin decays in various lattices
... transverse spin configuration √ generated by the rf excitation pulses. We define T2 as 1/M2 where M2 is the second moment of the FID. These two properties, together with the fact that T2 is the shortest intrinsic time scale of the system, imply that Eq. (1) cannot be derived from conventional statis ...
... transverse spin configuration √ generated by the rf excitation pulses. We define T2 as 1/M2 where M2 is the second moment of the FID. These two properties, together with the fact that T2 is the shortest intrinsic time scale of the system, imply that Eq. (1) cannot be derived from conventional statis ...
Nematic Fermi Fluids in Condensed Matter Physics
... semiconductor is only broken by higher order corrections to the effective mass approximation, nematic phases in such circumstances (including the quantum Hall nematic) are likely to be approximately XY nematics. For systems with full rotational symmetry, it is reasonable to consider more complex pat ...
... semiconductor is only broken by higher order corrections to the effective mass approximation, nematic phases in such circumstances (including the quantum Hall nematic) are likely to be approximately XY nematics. For systems with full rotational symmetry, it is reasonable to consider more complex pat ...
Ferromagnetism
Not to be confused with Ferrimagnetism; for an overview see Magnetism.Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets. In physics, several different types of magnetism are distinguished. Ferromagnetism (including ferrimagnetism) is the strongest type: it is the only one that typically creates forces strong enough to be felt, and is responsible for the common phenomena of magnetism in magnets encountered in everyday life. Substances respond weakly to magnetic fields with three other types of magnetism, paramagnetism, diamagnetism, and antiferromagnetism, but the forces are usually so weak that they can only be detected by sensitive instruments in a laboratory. An everyday example of ferromagnetism is a refrigerator magnet used to hold notes on a refrigerator door. The attraction between a magnet and ferromagnetic material is ""the quality of magnetism first apparent to the ancient world, and to us today"".Permanent magnets (materials that can be magnetized by an external magnetic field and remain magnetized after the external field is removed) are either ferromagnetic or ferrimagnetic, as are other materials that are noticeably attracted to them. Only a few substances are ferromagnetic. The common ones are iron, nickel, cobalt and most of their alloys, some compounds of rare earth metals, and a few naturally-occurring minerals such as lodestone.Ferromagnetism is very important in industry and modern technology, and is the basis for many electrical and electromechanical devices such as electromagnets, electric motors, generators, transformers, and magnetic storage such as tape recorders, and hard disks.