Topological Superconductivity in Artificial Heterostructures
... non-trivial topological phases of matter. In mathematics, topology is the study of structures which are classified according to their invariance under continuous deformations. These mathematical methods can be applied to the quantum mechanical wave function, revealing that topologically non-trivial s ...
... non-trivial topological phases of matter. In mathematics, topology is the study of structures which are classified according to their invariance under continuous deformations. These mathematical methods can be applied to the quantum mechanical wave function, revealing that topologically non-trivial s ...
... Note that both gAB and fBA , which are necessary for the calculation of the screened charges ZA in Eq. (5), depend, on turns, on the value of the ZA s, through Eqs. (6–8), particularly due to the dependence of the wavefunctions on ZA . Thus, it is necessary to implement an iterative procedure to det ...
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... physics: the physics of strongly correlated quantum gases. The system in question allows for an easy and accurate control and manipulation, and thus provides a new and particularly promising test ground for theories of quantum phase transitions [13], which have traditionally dealt with condensed-mat ...
... physics: the physics of strongly correlated quantum gases. The system in question allows for an easy and accurate control and manipulation, and thus provides a new and particularly promising test ground for theories of quantum phase transitions [13], which have traditionally dealt with condensed-mat ...
FrustrationVSFactorization - School of Mathematical Sciences
... of the same form as a spin-1/2 Hamiltonian that admits a factorized ground state at h=hf, will also admit a factorized ground state at the same value of the field: greater scope of our results • For a generic model (frustrated or not), the factorizing field (when it exists) is a precursor to the cri ...
... of the same form as a spin-1/2 Hamiltonian that admits a factorized ground state at h=hf, will also admit a factorized ground state at the same value of the field: greater scope of our results • For a generic model (frustrated or not), the factorizing field (when it exists) is a precursor to the cri ...
Negative stiffness and negative Poisson`s ratio in materials which
... purposes. If anisotropy is tolerable, a Reuss laminate provides better results in this context than a Voigt laminate. Representative results of this approach are shown in the map in Fig. 1. Negative stiffness or modulus allows larger damping, even damping tending to infinity, to be achieved, as pred ...
... purposes. If anisotropy is tolerable, a Reuss laminate provides better results in this context than a Voigt laminate. Representative results of this approach are shown in the map in Fig. 1. Negative stiffness or modulus allows larger damping, even damping tending to infinity, to be achieved, as pred ...
Quantized field description of rotor frequency
... 共Received 25 August 1999; accepted 22 October 1999兲 A formalized many-particle nonrelativistic classical quantized field interpretation of magic angle spinning 共MAS兲 nuclear magnetic resonance 共NMR兲 radio frequency-driven dipolar recoupling 共RFDR兲 is presented. A distinction is made between the MAS ...
... 共Received 25 August 1999; accepted 22 October 1999兲 A formalized many-particle nonrelativistic classical quantized field interpretation of magic angle spinning 共MAS兲 nuclear magnetic resonance 共NMR兲 radio frequency-driven dipolar recoupling 共RFDR兲 is presented. A distinction is made between the MAS ...
“New Horizons in Condensed Matter Physics”
... presence of an external potential this system becomes a quantum dot, a device that confines single electrons on a nanometre scale. The graphene dot is a close analogue of a relativistic atom, with the important feature that the strength of the confining potential is experimentally tunable. This enab ...
... presence of an external potential this system becomes a quantum dot, a device that confines single electrons on a nanometre scale. The graphene dot is a close analogue of a relativistic atom, with the important feature that the strength of the confining potential is experimentally tunable. This enab ...
Singularity of the time-energy uncertainty in adiabatic perturbation
... adiabatic resonance. Let us consider the magnetic field rotated by an angle β during the time T, i.e., ωT = β . Clearly, the Bloch vector r(t), which is initially aligned to the z-axis in the adiabatic frame (that is, the instantaneous eigenstate at t = 0), will point again to the z-axis if the Blo ...
... adiabatic resonance. Let us consider the magnetic field rotated by an angle β during the time T, i.e., ωT = β . Clearly, the Bloch vector r(t), which is initially aligned to the z-axis in the adiabatic frame (that is, the instantaneous eigenstate at t = 0), will point again to the z-axis if the Blo ...
109, 105302 (2012)
... (T > TBKT ), free vortices may exist, but they are not suitable for the observation of MFs due to the lack of phase coherence. Meanwhile, in the vortex lattice region (T < Tvortex ), the zero energy modes may break into two normal states with energy splitting / eR= [39,48] because of the large tu ...
... (T > TBKT ), free vortices may exist, but they are not suitable for the observation of MFs due to the lack of phase coherence. Meanwhile, in the vortex lattice region (T < Tvortex ), the zero energy modes may break into two normal states with energy splitting / eR= [39,48] because of the large tu ...
Simulating the Haldane phase in trapped
... done by adding a spin operator term, θ rotated from the z axis, namely, Fz,θ = (Fz cos θ + Fα sin θ ), where α can be either x or y or their superposition (XY plane), and generating each component separately. Fz cos θ can be produced similarly to the two ways that the D term was generated. ...
... done by adding a spin operator term, θ rotated from the z axis, namely, Fz,θ = (Fz cos θ + Fα sin θ ), where α can be either x or y or their superposition (XY plane), and generating each component separately. Fz cos θ can be produced similarly to the two ways that the D term was generated. ...
Triple to quintuple quantum dots for making multiple qubits
... 3Current address: Department of Physics, University of Basel, 4056 Basel, Switzerland ...
... 3Current address: Department of Physics, University of Basel, 4056 Basel, Switzerland ...
Stimulated emission from single quantum dipoles
... where d , , is the dipole matrix element. In deriving this result, the two-level system is assumed to have a spatial extent small in comparison to the optical wavelength so that the dipole approximation is applicable. In particular, the spatial variation of the optical wave is rcmoved from the inter ...
... where d , , is the dipole matrix element. In deriving this result, the two-level system is assumed to have a spatial extent small in comparison to the optical wavelength so that the dipole approximation is applicable. In particular, the spatial variation of the optical wave is rcmoved from the inter ...
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.