Preparing Ground States of Quantum Many
... Imitates an initially hot metal (random state) that is slowly cooled down. If cooling is too fast, the system can become trapped in a local minimum. Running time depends on the energy landscape. In the worst case, the running time is proportional to the number of states N = 2n . ...
... Imitates an initially hot metal (random state) that is slowly cooled down. If cooling is too fast, the system can become trapped in a local minimum. Running time depends on the energy landscape. In the worst case, the running time is proportional to the number of states N = 2n . ...
the hydrogen atom in a uniform magnetic field - an example
... detail. This has made chaos one of the fastest growing fields in physics. Bound classical motion in one spatial degree of freedom is always periodic if it is governed by a time independent Hamiltonian, i.e. if energy is conserved, and hence one-dimensional conservative systems cannot be chaotic. The ...
... detail. This has made chaos one of the fastest growing fields in physics. Bound classical motion in one spatial degree of freedom is always periodic if it is governed by a time independent Hamiltonian, i.e. if energy is conserved, and hence one-dimensional conservative systems cannot be chaotic. The ...
Sparse-Graph Codes for Quantum Error-Correction
... think a quantum code must have a large blocklength, and it must be able to correct a large number of errors. From a theoretical point of view, we would especially like to find, for any rate R, a family of error-correcting codes with increasing blocklength N , such that, no matter how large N is, the ...
... think a quantum code must have a large blocklength, and it must be able to correct a large number of errors. From a theoretical point of view, we would especially like to find, for any rate R, a family of error-correcting codes with increasing blocklength N , such that, no matter how large N is, the ...
Observation of Distinct Two-Photon Transition Channels in CdTe
... Semiconductor quantum dots (QDs) are nanomaterials represented by a three-dimensionally confined electron-hole system. Such tight spatial confinement provides interesting optical features, such as size-tunable absorption and emission, which are closely associated with new technologies spanning from ...
... Semiconductor quantum dots (QDs) are nanomaterials represented by a three-dimensionally confined electron-hole system. Such tight spatial confinement provides interesting optical features, such as size-tunable absorption and emission, which are closely associated with new technologies spanning from ...
How the Laws of Physics Lie
... they supposed to bring about the effects which are attributed to them, and exactly how good is our evidence that they do so? The general success of the theory at producing accurate predictions, or at unifying what before had been disparate, is no help here. We can believe in the unexpected entities ...
... they supposed to bring about the effects which are attributed to them, and exactly how good is our evidence that they do so? The general success of the theory at producing accurate predictions, or at unifying what before had been disparate, is no help here. We can believe in the unexpected entities ...
Inconsistencies of the Adiabatic Theorem and the Berry Phase
... gives rise to the adiabatic open-path Berry phase. Under strict adiabatic approximation using our previous solu(n) tion we find that ΦG [Γ] ≈ 0. Thus, it almost vanishes for all time! Therefore, it appears that under strict adiabatic evolution a quantum system cannot acquire any Berry phase (non-cyc ...
... gives rise to the adiabatic open-path Berry phase. Under strict adiabatic approximation using our previous solu(n) tion we find that ΦG [Γ] ≈ 0. Thus, it almost vanishes for all time! Therefore, it appears that under strict adiabatic evolution a quantum system cannot acquire any Berry phase (non-cyc ...
Quantum coherent biomolecular energy transfer with spatially
... transfer processes. The coupling of two chromophore pairs to the common slowly fluctuating modes even allows to entangle two excitonic pairs over surprisingly long times even at room temperature [40]. However, when the fluctuations are fast, no entanglement is created even when the two pairs couple ...
... transfer processes. The coupling of two chromophore pairs to the common slowly fluctuating modes even allows to entangle two excitonic pairs over surprisingly long times even at room temperature [40]. However, when the fluctuations are fast, no entanglement is created even when the two pairs couple ...
Nowling, Sean Robert - 2007
... time by the propagating string. The fields X µ (x) describe the embedding of the string worldsheet into spacetime. The low energy spectrum of this theory includes a massless scalar (the dilaton), a massless symmetric and traceless two tensor (the graviton), and a massless 2-form (the Kolb-Ramond fi ...
... time by the propagating string. The fields X µ (x) describe the embedding of the string worldsheet into spacetime. The low energy spectrum of this theory includes a massless scalar (the dilaton), a massless symmetric and traceless two tensor (the graviton), and a massless 2-form (the Kolb-Ramond fi ...
The Symplectization of Science - Pacific Institute for the
... Physics is geometry. This dictum is one of the guiding principles of modern physics. It largely originated with Albert Einstein, whose most important contribution–via his General Theory of Relativity–was to view the phenomenon of gravity as a reflection of the curvature of the geometry of spacetime. ...
... Physics is geometry. This dictum is one of the guiding principles of modern physics. It largely originated with Albert Einstein, whose most important contribution–via his General Theory of Relativity–was to view the phenomenon of gravity as a reflection of the curvature of the geometry of spacetime. ...
Quantum-gravitational effects for inflationary perturbations and the
... Yet we know that the theory is unlikely to be the final answer of how we should understand the concept of space and time. In fact, the theory’s problems lie deep within itself. Even the simplest solutions to the central equations of general relativity include a singularity, a point at which the theo ...
... Yet we know that the theory is unlikely to be the final answer of how we should understand the concept of space and time. In fact, the theory’s problems lie deep within itself. Even the simplest solutions to the central equations of general relativity include a singularity, a point at which the theo ...
Wigner function formalism in Quantum mechanics
... gives the expectation value of the operator A(x,p). Because of Heisenberg’s uncertainty principle it is not possible to find such a probability distribution. The Wigner function comes close to fulfill these demands, but it will not have a direct physical interpretation as a probability distrubition ...
... gives the expectation value of the operator A(x,p). Because of Heisenberg’s uncertainty principle it is not possible to find such a probability distribution. The Wigner function comes close to fulfill these demands, but it will not have a direct physical interpretation as a probability distrubition ...
Spectroscopic Selection Rules: The Role of Photon States
... magnitude of the angular momentum gained by the electron must exactly equal that of the photon that is being absorbed. However, it will be clear from the previous section that the magnitude of the electron orbital angular momentum for l = 1 ...
... magnitude of the angular momentum gained by the electron must exactly equal that of the photon that is being absorbed. However, it will be clear from the previous section that the magnitude of the electron orbital angular momentum for l = 1 ...
Continuous Variable Quantum Information: Gaussian States and
... of photons, ground/excited states of trapped ions, etc. In parallel, an “analog” approach has also been devised, based on quantum information and ...
... of photons, ground/excited states of trapped ions, etc. In parallel, an “analog” approach has also been devised, based on quantum information and ...
