Entanglement-seeded, dual, optical parametric amplification
... and for = we obtain the N = 4 N00N state 共兩4 , 0典 + 兩0 , 4典兲 / 冑2. As discussed earlier, if this state is used to measure a path-length difference in a Mach-Zehnder interferometer, it achieves a doubling in sensitivity compared to the standard shot-noise limit. Regarding use as a source for quan ...
... and for = we obtain the N = 4 N00N state 共兩4 , 0典 + 兩0 , 4典兲 / 冑2. As discussed earlier, if this state is used to measure a path-length difference in a Mach-Zehnder interferometer, it achieves a doubling in sensitivity compared to the standard shot-noise limit. Regarding use as a source for quan ...
Zeno dynamics in quantum open systems
... does not lead to more information about parameter τ than that obtained by system S itself. We are also able to find a set of equations for the optimum effective Hermitian operator hopt E that minimizes CQ (τ, H̃(τ )). There are, in fact, infinite different unitary evolutions of the enlarged system S ...
... does not lead to more information about parameter τ than that obtained by system S itself. We are also able to find a set of equations for the optimum effective Hermitian operator hopt E that minimizes CQ (τ, H̃(τ )). There are, in fact, infinite different unitary evolutions of the enlarged system S ...
What Is Quantum Information? - Quantum Theory Group at CMU
... Published answers to question: What is Quantum Information? • Bennett and Shor (1998) ◦ Qm ↔ Cl info is like complex ↔ real numbers – Interesting analogy, but what are the details? • Deutsch and Hayden (2000) ◦ Technical idea using Heisenberg representation – Causality, not information in Shannon se ...
... Published answers to question: What is Quantum Information? • Bennett and Shor (1998) ◦ Qm ↔ Cl info is like complex ↔ real numbers – Interesting analogy, but what are the details? • Deutsch and Hayden (2000) ◦ Technical idea using Heisenberg representation – Causality, not information in Shannon se ...
An Improved Quantum Algorithm for Searching an Ordered List
... In [4], Farhi et al. give a method for finding quantum algorithms for the ordered search problem, and find exact algorithms which solve the problem for 6 elements in 2 queries and for 52 elements in 3 queries. One may use these base cases to create a recursive solution to the general ordered search pr ...
... In [4], Farhi et al. give a method for finding quantum algorithms for the ordered search problem, and find exact algorithms which solve the problem for 6 elements in 2 queries and for 52 elements in 3 queries. One may use these base cases to create a recursive solution to the general ordered search pr ...
by Dr. Matti Pitkänen
... length and time scale. One of the surprising consequences of this model of learning is that p-adic length scale hypothesis originally suggested by elementary particle mass calculations and later deduced from the so-called elementary particle black hole analogy generalizing the area-entropy law of H ...
... length and time scale. One of the surprising consequences of this model of learning is that p-adic length scale hypothesis originally suggested by elementary particle mass calculations and later deduced from the so-called elementary particle black hole analogy generalizing the area-entropy law of H ...
Here
... that they share the same existence, even when light years apart. Indeed, distance has no meaning for entangled particles. If the state of one is changed, the state of the other is instantly adjusted to be consistent with quantum mechanical rules. If a measurement is made on one, the other will autom ...
... that they share the same existence, even when light years apart. Indeed, distance has no meaning for entangled particles. If the state of one is changed, the state of the other is instantly adjusted to be consistent with quantum mechanical rules. If a measurement is made on one, the other will autom ...
Two types of potential functions and their use in the
... Potential functions are to physicists what utility functions are to economists: they are both examples of fundamental workhorse tools. But can there exist some connection? Utility functions, u, are defined as: u : C → R, where C is a set of objects. A preference relation on two objects, x and y such ...
... Potential functions are to physicists what utility functions are to economists: they are both examples of fundamental workhorse tools. But can there exist some connection? Utility functions, u, are defined as: u : C → R, where C is a set of objects. A preference relation on two objects, x and y such ...
Dec. 5 - The atom
... Assume that an electron is in an exited state. What will happen to extra energy when the electron moves to the lowest state? n The left over energy when the electrically charged electron moves from a high state to a lower state is emitted in the form of a single packet of electromagnetic radiation ...
... Assume that an electron is in an exited state. What will happen to extra energy when the electron moves to the lowest state? n The left over energy when the electrically charged electron moves from a high state to a lower state is emitted in the form of a single packet of electromagnetic radiation ...
Why is Maxwell`s Theory so hard to understand?
... field-strength is the square-root of a joule per cubic meter. A joule is a unit of energy and a meter is a unit of length, but a square-root of a joule is not a unit of anything tangible. There is no way we can imagine measuring directly the square-root of a joule. The unit of electric field-strengt ...
... field-strength is the square-root of a joule per cubic meter. A joule is a unit of energy and a meter is a unit of length, but a square-root of a joule is not a unit of anything tangible. There is no way we can imagine measuring directly the square-root of a joule. The unit of electric field-strengt ...
Atomic physics
... R50. These phase shifts of the wave function are often described by the scattering length a, which is proportional to the tangent of the phase shift. If the interaction is attractive, a,0, while it is repulsive if a.0. The scattering length for two ground-state atoms can be extracted from the photoa ...
... R50. These phase shifts of the wave function are often described by the scattering length a, which is proportional to the tangent of the phase shift. If the interaction is attractive, a,0, while it is repulsive if a.0. The scattering length for two ground-state atoms can be extracted from the photoa ...
Von Neumann algebra automorphisms and time
... that this notion of time is state dependent. Furthermore, this weaker notion of time is lost as soon as one tries to include either thermodynamics or quantum mechanics into the physical picture, because, in the presence of thermal or quantum “superpositions” of geometries, the spacetime causal struc ...
... that this notion of time is state dependent. Furthermore, this weaker notion of time is lost as soon as one tries to include either thermodynamics or quantum mechanics into the physical picture, because, in the presence of thermal or quantum “superpositions” of geometries, the spacetime causal struc ...
Quantum electrodynamics
In particle physics, quantum electrodynamics (QED) is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quantum mechanics and special relativity is achieved. QED mathematically describes all phenomena involving electrically charged particles interacting by means of exchange of photons and represents the quantum counterpart of classical electromagnetism giving a complete account of matter and light interaction.In technical terms, QED can be described as a perturbation theory of the electromagnetic quantum vacuum. Richard Feynman called it ""the jewel of physics"" for its extremely accurate predictions of quantities like the anomalous magnetic moment of the electron and the Lamb shift of the energy levels of hydrogen.