Quantum Computing
... ‘no cloning’ property, and teleportation. Quantum cryptography is briefly sketched. The universal quantum computer is described, based on the Church-Turing Principle and a network model of computation. Algorithms for such a computer are discussed, especially those for finding the period of a functio ...
... ‘no cloning’ property, and teleportation. Quantum cryptography is briefly sketched. The universal quantum computer is described, based on the Church-Turing Principle and a network model of computation. Algorithms for such a computer are discussed, especially those for finding the period of a functio ...
Quantum non-demolition - Quantum Optics and Spectroscopy
... Throughout the last decade research has shown thtat there are several experimental implementations that fulfill most or even all of these points and might be considered as candidates for a quantum computer: nuclear spins [8], superconducting Josephson junctions [9, 10], quantum dots [11], neutral at ...
... Throughout the last decade research has shown thtat there are several experimental implementations that fulfill most or even all of these points and might be considered as candidates for a quantum computer: nuclear spins [8], superconducting Josephson junctions [9, 10], quantum dots [11], neutral at ...
Ph.D. Thesis Giuseppe Prettico
... We move later to deepen the connection between privacy and nonlocality. With this aim, we consider the private states, that is, those quantum states from which two or more honest parties can extract a secret key. We show that all private states are non local, in the sense that they always violate th ...
... We move later to deepen the connection between privacy and nonlocality. With this aim, we consider the private states, that is, those quantum states from which two or more honest parties can extract a secret key. We show that all private states are non local, in the sense that they always violate th ...
Quantum Computation, Quantum Theory and AI
... quantum measurements are allowed. For example, a quantum automaton introduced in [70] may be observed only after all input symbols have been read, whereas a quantum automaton in [64] is allowed to be observed after reading each symbol. The most general model of quantum finite automata was proposed i ...
... quantum measurements are allowed. For example, a quantum automaton introduced in [70] may be observed only after all input symbols have been read, whereas a quantum automaton in [64] is allowed to be observed after reading each symbol. The most general model of quantum finite automata was proposed i ...
Exciton-Polariton Bose-Einstein Condensation: Advances and
... measured, and thermal equilibrium is not usually clearly assessed. For polaritons, their very steep energy dispersion around k// ~ 0 allows to measure precisely their distribution in momentum space and thus derive their temperature when they are in thermal equilibrium. BEC should also result in the ...
... measured, and thermal equilibrium is not usually clearly assessed. For polaritons, their very steep energy dispersion around k// ~ 0 allows to measure precisely their distribution in momentum space and thus derive their temperature when they are in thermal equilibrium. BEC should also result in the ...
Quantum Error Correction (QEC) - ETH E
... so called universal gates or even from one single (e.g. NAND). This is not surprising, as the truth table of a classical gate has finite combinations of outputs. This is very important for hardware construction. If we are able to implement such a set of universal gates we can compute what ever we wa ...
... so called universal gates or even from one single (e.g. NAND). This is not surprising, as the truth table of a classical gate has finite combinations of outputs. This is very important for hardware construction. If we are able to implement such a set of universal gates we can compute what ever we wa ...
CDM article on quantum chaos - Department of Mathematics
... XΓ = Γ\H, where H is the hyperbolic plane and Γ ⊂ P SL(2, R) is a discrete subgroup. Of special interest are the arithmetic quotients when Γ is a discrete arithmetic subgroup. Other model example include Euclidean domains with ergodic billiards such as the Bunimovich stadium. The general question is ...
... XΓ = Γ\H, where H is the hyperbolic plane and Γ ⊂ P SL(2, R) is a discrete subgroup. Of special interest are the arithmetic quotients when Γ is a discrete arithmetic subgroup. Other model example include Euclidean domains with ergodic billiards such as the Bunimovich stadium. The general question is ...
Far-infrared-driven electron-hole correlations in a quantum dot with an internal... Roger Sakhel, Lars Jo¨nsson, and John W. Wilkins
... The exciton basis states are products of single-particle orbitals. Although we only have single-exciton states, and therefore have only products and no proper Slater determinants, we call the exciton basis states ‘‘determinants’’ throughout this paper. The determinants that satisfy the interband sel ...
... The exciton basis states are products of single-particle orbitals. Although we only have single-exciton states, and therefore have only products and no proper Slater determinants, we call the exciton basis states ‘‘determinants’’ throughout this paper. The determinants that satisfy the interband sel ...
Wigner function formalism in Quantum mechanics
... there is an uncertainty priciple that makes it impossible to know both q or x and p at the same time. In the standard formulation of quantum mechanics one works with probability densities instead. One for the wavefunction in position-basis and one for the wave function in the momentun-basis P (x) = ...
... there is an uncertainty priciple that makes it impossible to know both q or x and p at the same time. In the standard formulation of quantum mechanics one works with probability densities instead. One for the wavefunction in position-basis and one for the wave function in the momentun-basis P (x) = ...
Challenges to the Second Law of Thermodynamics - Exvacuo
... no experimental violation has been claimed and confirmed. In this volume we will attempt to remain clear on this point; that is, while the second law might be potentially violable, it has not been violated in practice. This being the case, it is our position that the second law should be considered a ...
... no experimental violation has been claimed and confirmed. In this volume we will attempt to remain clear on this point; that is, while the second law might be potentially violable, it has not been violated in practice. This being the case, it is our position that the second law should be considered a ...
Particle in a box
In quantum mechanics, the particle in a box model (also known as the infinite potential well or the infinite square well) describes a particle free to move in a small space surrounded by impenetrable barriers. The model is mainly used as a hypothetical example to illustrate the differences between classical and quantum systems. In classical systems, for example a ball trapped inside a large box, the particle can move at any speed within the box and it is no more likely to be found at one position than another. However, when the well becomes very narrow (on the scale of a few nanometers), quantum effects become important. The particle may only occupy certain positive energy levels. Likewise, it can never have zero energy, meaning that the particle can never ""sit still"". Additionally, it is more likely to be found at certain positions than at others, depending on its energy level. The particle may never be detected at certain positions, known as spatial nodes.The particle in a box model provides one of the very few problems in quantum mechanics which can be solved analytically, without approximations. This means that the observable properties of the particle (such as its energy and position) are related to the mass of the particle and the width of the well by simple mathematical expressions. Due to its simplicity, the model allows insight into quantum effects without the need for complicated mathematics. It is one of the first quantum mechanics problems taught in undergraduate physics courses, and it is commonly used as an approximation for more complicated quantum systems.