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Emulating Quantum Computation
Emulating Quantum Computation

agostino pr´astaro
agostino pr´astaro

"Electronic Spectroscopy and Energy Transfer in Cadmium Selenide Quantum Dots and Conjugated Oligomers"
"Electronic Spectroscopy and Energy Transfer in Cadmium Selenide Quantum Dots and Conjugated Oligomers"

... The electronic excited state kinetics of CdSe quantum dots (QD) are studied through optical spectroscopy, by subjecting the quantum dots to different experimental conditions, as well as coupling them to phenylene-ethynylene oligomers. CdSe QDs feature a quantum-confined exciton state which pursues a ...
TrajectoryBased Nonadiabatic Dynamics with TimeDependent
TrajectoryBased Nonadiabatic Dynamics with TimeDependent

... freedom. In the following, atomic units will be used except for the reduced Planck constant h, which will be kept for clarity. In this first section, we will derive the equations of motion for the nuclear (slow) and electronic (fast) degrees of freedom by using what is known as a trajectory-based a ...
Chapter 3 QUANTUM MONTE CARLO SIMULATION
Chapter 3 QUANTUM MONTE CARLO SIMULATION

... approach with these formalisms showing that our proposal is a particular solution of the Liouville equation (see section 3.4 or [paper H]). On important property of our approach is its ability to provide either static or dynamic information of the devices. As we have pointed out in the first conclus ...
pdf
pdf

... Large angle Bragg scattering was then used to probe the momentum distribution. We found reasonable agreement with the theory. With the same technique of Bragg diffraction, we studied the four-wave mixing process for matter waves. The BEC was split into two strong source waves and a weak seed wave. T ...
Quantum computation and quantum information (PDF
Quantum computation and quantum information (PDF

... by a pair of real-valued parameters taking continuous values, it follows that, theoretically, a qubit could hold an infinite amount of information. However, we cannot extract more information from such a qubit than we are able to from a classical bit. The reason is that we have to measure the qubit ...
∗ ∗
∗ ∗

Interacting Rydberg atoms
Interacting Rydberg atoms

... Interactions between single atoms are fundamental to physics and to control them is an ultimate goal. The exaggerated properties of Rydberg atoms offer to met the technical challenges to isolate and control single interaction channels in ultracold gases. Here, I present experiments on two subjects r ...
Quantum entanglement in photosynthetic light harvesting complexes
Quantum entanglement in photosynthetic light harvesting complexes

... To further elucidate the dynamics and structure of entanglement in the FMO monomer under realistic conditions, we examine pairwise entanglement in the system, as measured by the bipartite concurrence between two sites: Cij = 2|ρij | for any two sites i, j. Figures 3 and 4 show the time evolution of ...
What a Structuralist Theory of Properties Could Not Be
What a Structuralist Theory of Properties Could Not Be

Photon echoes for a system of large negative spin and few mean
Photon echoes for a system of large negative spin and few mean

... was found that the atomic state was in a “pure” state where the entropy approched zero no matter what the intial TLM state. Tessier [12] provided a discussion on entanglement sharing for the TCMs. Jarvis [13] considered up to six TLMs and a large mean number of coherent photons, although displaying ...
Quantum information processing beyond ten ion
Quantum information processing beyond ten ion

Macroscopic Local Realism: How Do We Define It and Is It
Macroscopic Local Realism: How Do We Define It and Is It

Continuous Variable Quantum Information: Gaussian States and
Continuous Variable Quantum Information: Gaussian States and

Matter-wave solitons beyond 1D contact-interaction mean
Matter-wave solitons beyond 1D contact-interaction mean

Full text in PDF form
Full text in PDF form

... Those somewhat underestimated facts seem to underlie statements about an inadequacy of Shannon entropy in the quantum context, [11], while an equally valid statement is that the von Neumann entropy happens to be inadequate. The solution of the dilemma lies in specifying the purpose, see also [12]. 1 ...
dual numbers representation of rigid body dynamics
dual numbers representation of rigid body dynamics

Phy CH 06 momentum - Milton-Union Exempted Village Schools
Phy CH 06 momentum - Milton-Union Exempted Village Schools

Theory of ultracold atomic Fermi gases
Theory of ultracold atomic Fermi gases

Spin Physics in Two-dimensional Systems  Daniel Gosálbez Martínez
Spin Physics in Two-dimensional Systems Daniel Gosálbez Martínez

... Graphene was the first example of a truly two dimensional (2D) crystal. This sort of materials were unexpected because it was believed that long range order due to the spontaneous breaking of a continuous symmetry in two dimensions was destroyed by long-wavelength fluctuations[1]. Since its discover ...
On the Classical and Quantum Momentum Map
On the Classical and Quantum Momentum Map

... and we discuss some properties of Poisson manifolds. Within this framework, we introduce the Poisson action and the momentum map, and, as a warm up, we see the way they generalize the discussion in Chapter 1. Afterwards we commence the study of the part of the momentum map, the infinitesimal momentu ...
Electronic and Optical Properties of Quantum Dots: A Tight - E-LIB
Electronic and Optical Properties of Quantum Dots: A Tight - E-LIB

Quantum Information with Fermionic Gaussian States - Max
Quantum Information with Fermionic Gaussian States - Max

... A.4 Port-based teleportation . . . . . . . . A.4.1 Example: POVM measurement Bibliography ...
< 1 2 3 4 5 6 7 8 9 10 ... 516 >

Renormalization group



In theoretical physics, the renormalization group (RG) refers to a mathematical apparatus that allows systematic investigation of the changes of a physical system as viewed at different distance scales. In particle physics, it reflects the changes in the underlying force laws (codified in a quantum field theory) as the energy scale at which physical processes occur varies, energy/momentum and resolution distance scales being effectively conjugate under the uncertainty principle (cf. Compton wavelength).A change in scale is called a ""scale transformation"". The renormalization group is intimately related to ""scale invariance"" and ""conformal invariance"", symmetries in which a system appears the same at all scales (so-called self-similarity). (However, note that scale transformations are included in conformal transformations, in general: the latter including additional symmetry generators associated with special conformal transformations.)As the scale varies, it is as if one is changing the magnifying power of a notional microscope viewing the system. In so-called renormalizable theories, the system at one scale will generally be seen to consist of self-similar copies of itself when viewed at a smaller scale, with different parameters describing the components of the system. The components, or fundamental variables, may relate to atoms, elementary particles, atomic spins, etc. The parameters of the theory typically describe the interactions of the components. These may be variable ""couplings"" which measure the strength of various forces, or mass parameters themselves. The components themselves may appear to be composed of more of the self-same components as one goes to shorter distances.For example, in quantum electrodynamics (QED), an electron appears to be composed of electrons, positrons (anti-electrons) and photons, as one views it at higher resolution, at very short distances. The electron at such short distances has a slightly different electric charge than does the ""dressed electron"" seen at large distances, and this change, or ""running,"" in the value of the electric charge is determined by the renormalization group equation.
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