Winter 2006 Colloquium Series Physics Department University of Oregon 4:00 Thursdays, 100 Willamette
... experimental efforts, however, have been devoted to discrete variables, and more importantly, there has been no conclusive evidence in favor of quantum mechanics mainly due to experimental loopholes. In this talk, we will take some theoretical considerion of continuous variables (CVs) as the origina ...
... experimental efforts, however, have been devoted to discrete variables, and more importantly, there has been no conclusive evidence in favor of quantum mechanics mainly due to experimental loopholes. In this talk, we will take some theoretical considerion of continuous variables (CVs) as the origina ...
Another version - Scott Aaronson
... Theorem: Suppose U implements (say) a computationallyuniversal, reversible cellular automaton. Then after t=exp(n) iterations, C(|t) is superpolynomial in n, unless something very unlikely happens with complexity classes (PSPACEPP/poly) Proof Sketch: I proved in 2004 that PP=PostBQP Suppose C(| ...
... Theorem: Suppose U implements (say) a computationallyuniversal, reversible cellular automaton. Then after t=exp(n) iterations, C(|t) is superpolynomial in n, unless something very unlikely happens with complexity classes (PSPACEPP/poly) Proof Sketch: I proved in 2004 that PP=PostBQP Suppose C(| ...
Aug 29 - BYU Physics and Astronomy
... Conjugates quantities of a particle (ex: position & momentum) can not be known simultaneously within a certain accuracy limit 2) Quantization: The measurement of a physical quantity in a confined system results in quanta (the measured values are discrete) 3) Wave-particle duality: All particles can ...
... Conjugates quantities of a particle (ex: position & momentum) can not be known simultaneously within a certain accuracy limit 2) Quantization: The measurement of a physical quantity in a confined system results in quanta (the measured values are discrete) 3) Wave-particle duality: All particles can ...
Classical limit and quantum logic - Philsci
... In the foundations of physics, the quest of explaining how the laws of classical mechanics arise from the laws of quantum mechanics is known as the classical limit problem (Cohen 1989). Generally, this limit is studied for systems that, due to its interaction with the environment, develop a process ...
... In the foundations of physics, the quest of explaining how the laws of classical mechanics arise from the laws of quantum mechanics is known as the classical limit problem (Cohen 1989). Generally, this limit is studied for systems that, due to its interaction with the environment, develop a process ...
B.3 Time dependent quantum mechanics
... Time-independent perturbation theory is based on the idea that if H H0 V , and the matrix elements or eigenfunctions of H0 are known, we can derive corrected energy levels based on the smallness of the perturbation V compared to H0 . Time dependent perturbation theory follows a very similar idea ...
... Time-independent perturbation theory is based on the idea that if H H0 V , and the matrix elements or eigenfunctions of H0 are known, we can derive corrected energy levels based on the smallness of the perturbation V compared to H0 . Time dependent perturbation theory follows a very similar idea ...
Comment on Griffiths about locality, realism and Bell experiments
... Experiments in physics usually consist of getting information about physical systems in specific states. A particular state is obtained after an appropriate preparation and the information is usually got via measurments. To be general enough I will consider that the result of the measurement is stat ...
... Experiments in physics usually consist of getting information about physical systems in specific states. A particular state is obtained after an appropriate preparation and the information is usually got via measurments. To be general enough I will consider that the result of the measurement is stat ...
a Multicromophoric approach to describe the energy
... Open quantum systems: we have a total Hilbert space HSE = HS ⊗ HE with a density matrix ρSE . By tracing out the environment degrees of freedom we obtain the density matrix ρS that lives in the HS space: ρS = TrE (ρSE ) ...
... Open quantum systems: we have a total Hilbert space HSE = HS ⊗ HE with a density matrix ρSE . By tracing out the environment degrees of freedom we obtain the density matrix ρS that lives in the HS space: ρS = TrE (ρSE ) ...
Fundamentals of quantum mechanics Quantum Theory of Light and Matter
... Quantum Theory of Light and Matter Quantum mechanics revision ...
... Quantum Theory of Light and Matter Quantum mechanics revision ...
Time Evolution of States for Open Quantum
... 0 < t < ε, ρ̂S (t) is a mixed state for ε small enough. For isolated (closed) systems, if the initial state is pure then it stays pure at every time, as it can be easily seen using equation (1.3). So our first step in this paper is to compute p̈ur (0). In particular for a large class of models, incl ...
... 0 < t < ε, ρ̂S (t) is a mixed state for ε small enough. For isolated (closed) systems, if the initial state is pure then it stays pure at every time, as it can be easily seen using equation (1.3). So our first step in this paper is to compute p̈ur (0). In particular for a large class of models, incl ...
Quantum Discord: A Measure of the Quantumness of Correlations
... more than one basis 兵jaj 典其j for the apparatus is needed in Eq. (20) in order to warrant a nonvanishing discord. The difference between separability and vanishing discord can be illustrated by a specific example. Fig12z ure 2 shows discord for a Werner state p rS ,A 苷 4 1 1 zjc典 具cj with jc典 苷 共j00典 ...
... more than one basis 兵jaj 典其j for the apparatus is needed in Eq. (20) in order to warrant a nonvanishing discord. The difference between separability and vanishing discord can be illustrated by a specific example. Fig12z ure 2 shows discord for a Werner state p rS ,A 苷 4 1 1 zjc典 具cj with jc典 苷 共j00典 ...
Quantum algorithm
... Does this graph have a cycle that contains every vertex? Hamiltonian cycles are: Easy to verify; Hard to find (too many possibilities). ...
... Does this graph have a cycle that contains every vertex? Hamiltonian cycles are: Easy to verify; Hard to find (too many possibilities). ...
generation of arbitrary quantum states from atomic ensembles
... system’s Hamiltonian, higher-order terms can be used in cavity with a 55 MHz linewidth constructed from a combination with specific measurements on the scattered standard lens with high reflectivity coating on each side, optical mode to produce arbitrary quantum CSE states that can be tuned by varyi ...
... system’s Hamiltonian, higher-order terms can be used in cavity with a 55 MHz linewidth constructed from a combination with specific measurements on the scattered standard lens with high reflectivity coating on each side, optical mode to produce arbitrary quantum CSE states that can be tuned by varyi ...
Understanding the destruction of nth
... as the interference of multiple particle amplitudes. With this conception a generalized ‘‘which-path’’ detection may be established in terms of multiparticle paths as the physical mechanism of higher order decoherence for some examples. In Sec. II, we will briefly explain Glauber’s nth-order quantum ...
... as the interference of multiple particle amplitudes. With this conception a generalized ‘‘which-path’’ detection may be established in terms of multiparticle paths as the physical mechanism of higher order decoherence for some examples. In Sec. II, we will briefly explain Glauber’s nth-order quantum ...
Another version - Scott Aaronson
... As a first step, understand the distribution of Per(X), X Gaussian Early experimental implementations have been done (Rome, Brisbane, Vienna, Oxford)! But so far with just 3-4 photons. For scaling, will be crucial to understand the complexity of BosonSampling when a constant fraction of photons are ...
... As a first step, understand the distribution of Per(X), X Gaussian Early experimental implementations have been done (Rome, Brisbane, Vienna, Oxford)! But so far with just 3-4 photons. For scaling, will be crucial to understand the complexity of BosonSampling when a constant fraction of photons are ...
Quantum Computing
... perfectly isolated—but rather every system is loosely coupled with the energetic state of its surroundings. Viewed in isolation, the system's dynamics are nonunitary (although the combined system plus environment evolves in a unitary fashion). Thus the dynamics of the system alone, treated in isolat ...
... perfectly isolated—but rather every system is loosely coupled with the energetic state of its surroundings. Viewed in isolation, the system's dynamics are nonunitary (although the combined system plus environment evolves in a unitary fashion). Thus the dynamics of the system alone, treated in isolat ...
