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Quantum communication: Approaching the quantum limit
Quantum communication: Approaching the quantum limit

... the nulling measurement to subsequent bins until we obtain the response that could have been generated by a pulse. Once this occurs, we test the hypothesis that the pulse was indeed present in the ‘suspicious’ bin by switching to direct detection for the remaining bins. This hypothesis is corroborat ...
Theoretical study of the phase evolution in a quantum dot in the
Theoretical study of the phase evolution in a quantum dot in the

... and the phase controlling the conductance. 2. This result is beyond the simple single-level Anderson model (SLAM) description and supposes to consider the generalisation to the multi-level Anderson model (MLAM). Done here in a minimal way by introducing a multiplicative factor in front of the S-matr ...
Lecture 8 - Institute of Materials Science
Lecture 8 - Institute of Materials Science

Atomic Structure and the Periodic Table Atomic Structure and the
Atomic Structure and the Periodic Table Atomic Structure and the

A Weak Gravity Conjecture for Scalar Field Theories
A Weak Gravity Conjecture for Scalar Field Theories

... Arkani-Hamed et.al. conjectured an upper bound on the strength of gravity relative to gauge forces in quantum gravity [4]. Their conjecture enriches the criteria of consistent effective field theory proposed in [2, 3]. These criteria help to constrain the string landscape [1] in the vast vacua of st ...
Quantum Information Science
Quantum Information Science

Easy introduction to quantum informatics
Easy introduction to quantum informatics

... It follows from QM itself! (known as No Cloning Theorem) ...
general-relativity as an effective-field theory
general-relativity as an effective-field theory

... of QCD. Both are nonlinear, nonrenormalizable theories with a dimensionful coupling constant. If the pion mass were taken to zero, as can be easily achieved theoretically, long distance effects similar to those from graviton loops would be found. In addition we have had the benefit of detailed calcu ...
Numerical Methods Project: Feynman path integrals in quantum
Numerical Methods Project: Feynman path integrals in quantum

... To test the program, the harmonic potential was chosen. It has good proporties such as being smooth and well confined, which means that the discrepancies around the endpoints become unimportant. Also the analytical solution for this problem is well known, which means that error estimating will be st ...
Interactions specimen questions
Interactions specimen questions

Operator Theory - UNL Math Department
Operator Theory - UNL Math Department

... can never measure both something's position and speed very accurately. Even if you could measure one of those very very accurately, you will always find that when you try to measure both together there's an inaccuracy built right into the setup which makes one or other of the measurement inaccurate. ...
Review by Robert Charman in Journal of the Society for Psychical
Review by Robert Charman in Journal of the Society for Psychical

Number: Name: 1 Positive ions with charge q and mass m are, in the
Number: Name: 1 Positive ions with charge q and mass m are, in the

... where it was noted that d# = πR is just the length of a semi-circle. Examination of an arbitrary d!# for the I2 semi-circle shows the field now points out of the paper so the total B = B1 − B2 into the paper. The result for the second semi-circle is evidently I1 → I2 : B2 = and so for the magnitude: ...
of THE by 0.
of THE by 0.

... reabsorption) that is regarded as the mechanism by which the electron interacts with the zero-point field. It must be emphasized that this mechanism of photon emission and absorption is a very convenient way of handling radiation problems. ...
quantum mechanical model
quantum mechanical model

... to higher energy levels. This is called the excited state. • When the electron returns to the ground state, it releases energy in the form of light. Emission Line Spectra ...
Quantum Chemical Simulations and Descriptors
Quantum Chemical Simulations and Descriptors

... The spectral lines are not continuous: every chemical element only absorbs electromagnetic radiations at particular wavelengths. This can only be explained considering that at the atomic level, energy is quantized ...
The Paradoxes of Quantum Mechanics
The Paradoxes of Quantum Mechanics

... They carry both momentum and energy, which are simply related, E = pc, a formula that is equally valid for photons and electromagnetic waves. (Here E is the total energy of the photon, p is its momentum, and c is the velocity of light.) If the waves have the wavelength λ, then the corresponding phot ...
Quantum orders in an exact soluble model
Quantum orders in an exact soluble model

... energy excitations without the needs to know the details of a system.[7, 10, 11] The main difference between classical orders and quantum orders is that classical orders produce and protect gapless Nambu-Goldstone modes[8, 9] which is a bosonic excitation, while quantum orders can produce and protec ...
“Location” of Electrons in the Quantum Mechanical Model
“Location” of Electrons in the Quantum Mechanical Model

... “Location” of Electrons in the Quantum Mechanical Model Now…where are those electrons again? ...
The Spin-Statistics Relation and Noncommutative Quantum
The Spin-Statistics Relation and Noncommutative Quantum

on the behaviour of atoms in an electromagnetic wa ve field
on the behaviour of atoms in an electromagnetic wa ve field

... extent and in what manner the conceptions and the laws of classical electrodynamics can be used in order to establish a description of the actual properties of atoms. Now, an outstanding nonclassical feature of these properties is a certain element of discontinuity which finds an appropriate express ...
Quantum Mechanical Model
Quantum Mechanical Model

P410M: Relativistic Quantum Fields
P410M: Relativistic Quantum Fields

... ^ and momentum p^ operators. For example, the position-space wavefunction is hxjÃi = Ãx(x) and jhxjÃij2 = jÃx(x)j2 is the probability of finding the particle at position x. Sincejxi and jpi are not aligned bases, the state cannot be an eigenvector of position and momentum simultaneously. Also, since ...
Physics 214 Lecture 11
Physics 214 Lecture 11

Document
Document

... 4. How much work must be done to pull apart the electron and the proton that make up the hydrogen atom if the atom is initially in (a) its ground state and (b) the state with n = 2? ANSWER: (a) 13.6 eV; (b) 3.40 eV 5. What is the probability that in the ground state of the hydrogen atom, the electro ...
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History of quantum field theory

In particle physics, the history of quantum field theory starts with its creation by Paul Dirac, when he attempted to quantize the electromagnetic field in the late 1920s. Major advances in the theory were made in the 1950s, and led to the introduction of quantum electrodynamics (QED). QED was so successful and ""natural"" that efforts were made to use the same basic concepts for the other forces of nature. These efforts were successful in the application of gauge theory to the strong nuclear force and weak nuclear force, producing the modern standard model of particle physics. Efforts to describe gravity using the same techniques have, to date, failed. The study of quantum field theory is alive and flourishing, as are applications of this method to many physical problems. It remains one of the most vital areas of theoretical physics today, providing a common language to many branches of physics.
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