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Lectures on Random Schrödinger Operators
Lectures on Random Schrödinger Operators

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Spins in quantum dots: Hyperfine interaction, transport, and
Spins in quantum dots: Hyperfine interaction, transport, and

... R time-ordering operator. If the exchange is pulsed on for a time τs such that J(t)dt/~ = J0 τs /~ = π, the states of the two spins, with associated operators SL and SR , will be exchanged. This is the swap operation. Pulsing the exchange for the shorter time τs /2 generates the “square-root of swap ...
Quantum Information Processing - wolfgang
Quantum Information Processing - wolfgang

Frozen Quantum Coherence - School of Mathematical Sciences
Frozen Quantum Coherence - School of Mathematical Sciences

Colloquium: Multiparticle quantum superpositions and the quantum
Colloquium: Multiparticle quantum superpositions and the quantum

lecture 3
lecture 3

... – 1790: Length of a pendulum with half-period of one second – 1791: One ten-millionth of ¼ Earth’s meridian through Paris – 1799: Platinum meter bar (refined in 1889 and 1927) – 1960: 1,650,763.73 wavelengths of 2p105d5 of Kr-86 – 1983: Length traveled by light in vacuum in 1/299,762,458 of a sec – ...
lecture 3
lecture 3

When does a physical system compute?
When does a physical system compute?

Quantum correlations and distinguishability of quantum states
Quantum correlations and distinguishability of quantum states

BASIS SET SUPERPOSITION ERROR EFFECTS, EXCITED-STATE POTENTIAL ENERGY SURFACE AND
BASIS SET SUPERPOSITION ERROR EFFECTS, EXCITED-STATE POTENTIAL ENERGY SURFACE AND

Interaction between Atomic Ensembles and Optical
Interaction between Atomic Ensembles and Optical

... dipole to be driven by the unperturbed incident field, but have to selfconsistently include the field emitted by the atom, and circulating in the cavity, into the total driving field. Thus for η > 1, the backaction of the cavity field generated by the oscillating atomic dipole on that same dipole is ...
HBNI Th65 - The Institute of Mathematical Sciences
HBNI Th65 - The Institute of Mathematical Sciences

... A unitary operator U effects the following transformation ρ → ρ = U ρ U † , ρ and ρ ∈ Λ(HS ). But if the system is in interaction with its environment, then the evolutions of the system of interest resulting from unitary evolutions of the composite are more general, but nevertheless described by lin ...
Studies in plausibility theory, with applications to physics
Studies in plausibility theory, with applications to physics

Theories of Experimentally Observed Excitation
Theories of Experimentally Observed Excitation

... about their theoretical interpretation. It just so happened that the materials considered were all realizations of the square lattice antiferromagnet. Of course calling this a coincidence is an exaggeration. Indeed the magnetic properties of the square lattice antiferromagnet is one of the fundament ...
Quantum Error Correction (QEC) - ETH E
Quantum Error Correction (QEC) - ETH E

The Pokorski Group Story III. 1. The Beginnings Among those who
The Pokorski Group Story III. 1. The Beginnings Among those who

... Theoretical Physics, Trieste, Italy. However, at the time the most important for my research was my year-long postdoctoral internship at CERN (1972–1973) as it was then when I obtained quite important results in analyzing the overlap function, in particular for its spin structure. Maria Krawczyk beg ...
Strongly correlated quantum physics with cold atoms - Max
Strongly correlated quantum physics with cold atoms - Max

Departament de Física Quantum Information with Continuous Variable systems Grup de Física Teòrica
Departament de Física Quantum Information with Continuous Variable systems Grup de Física Teòrica

... information theory into the quantum realm, by using the laws of quantum physics to encode, process and extract information. It was Rolf Landauer, known among other things for his remarkable contributions to the theory of electrical conductivity, who at the end of 1960 coined the idea that informatio ...
Infinitely Disordered Critical Behavior in Higher Dimensional
Infinitely Disordered Critical Behavior in Higher Dimensional

Lossless Quantum Data Compression and Secure Direct
Lossless Quantum Data Compression and Secure Direct

... Quantum information theory is the combination of quantum mechanics and information theory. The profit is on both sides: quantum mechanics gains valuable aspects concerning the physical interpretation of the theory, and information theory gains enhanced capabilities of information processing and comm ...
(Never) Mind your p`s and q`s: Von Neumann versus Jordan on the
(Never) Mind your p`s and q`s: Von Neumann versus Jordan on the

... The probability amplitude ϕ(a, b) between two quantum-mechanical quantities â and b̂ with fully continuous spectra is a complex function, the absolute square of which, |ϕ(a, b)|2 , multiplied by da gives the conditional probability Pr(a|b) for finding a value between a and a + da for â given that ...
Spin and Charge Transport through Driven Quantum Dot Systems
Spin and Charge Transport through Driven Quantum Dot Systems

... The access to the quantum nature of matter has been for years restricted to quantum optics experiments where the study of the spectra resulting from the illumination of atomic and molecular systems provides information on their energy distribution and gives the opportunity to coherently excite inter ...
Quantum Physics of Nature QuPoN 2015 Book of Abstracts
Quantum Physics of Nature QuPoN 2015 Book of Abstracts

... encode one logical qubit in entangled states distributed over seven trapped-ion qubits. We demonstrate the capability of the code to detect one bit flip, phase flip or a combined error of both, regardless on which of the qubits they occur. Furthermore, we apply combinations of the entire set of logi ...
3.1. Solutions of Laplace`s Equation in One
3.1. Solutions of Laplace`s Equation in One

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Scalar field theory

In theoretical physics, scalar field theory can refer to a classical or quantum theory of scalar fields. A scalar field is invariant under any Lorentz transformation.The only fundamental scalar quantum field that has been observed in nature is the Higgs field. However, scalar quantum fields feature in the effective field theory descriptions of many physical phenomena. An example is the pion, which is actually a pseudoscalar.Since they do not involve polarization complications, scalar fields are often the easiest to appreciate second quantization through. For this reason, scalar field theories are often used for purposes of introduction of novel concepts and techniques.The signature of the metric employed below is (+, −, −, −).
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