Easy introduction to quantum informatics
... It follows from QM itself! (known as No Cloning Theorem) ...
... It follows from QM itself! (known as No Cloning Theorem) ...
Quantum Error-Correction Codes on Abelian Groups
... a state of the form |t, where t ∈ G (bit has a similar meaning). Also let us remind that the standard basis of H is {|t : t ∈ G}. So for the given finite abelian group G, we have the following protocol. QKD protocol: CSSG codes 1: Alice creates n random check bits, a random m bit key k, and two ran ...
... a state of the form |t, where t ∈ G (bit has a similar meaning). Also let us remind that the standard basis of H is {|t : t ∈ G}. So for the given finite abelian group G, we have the following protocol. QKD protocol: CSSG codes 1: Alice creates n random check bits, a random m bit key k, and two ran ...
What is density operator?
... although perhaps not entirely obvious, that the statistics of any measurements we might choose to make on system A will be independent of whatever Charlie happens to do with system B – we assume that A and B can no longer physically interact after they have been separated. Hence we would like to hav ...
... although perhaps not entirely obvious, that the statistics of any measurements we might choose to make on system A will be independent of whatever Charlie happens to do with system B – we assume that A and B can no longer physically interact after they have been separated. Hence we would like to hav ...
Quantum Mathematics
... But a field contains more than perturbative information (think of kinks, instantons, phase transition, etc.), so one would expect situations in which Zi, f > 0 even in the absence of a formal proof, in system X, of statement f, from the axioms i. ...
... But a field contains more than perturbative information (think of kinks, instantons, phase transition, etc.), so one would expect situations in which Zi, f > 0 even in the absence of a formal proof, in system X, of statement f, from the axioms i. ...
Quantized Vibrational Energy for a diatomic molecule
... Where do the energy equations come from? The motion of atoms, molecules, electrons … is described by Quantum Mechanics. The central equation of Quantum Mechanics is the Schrödinger Equation. Solving the Schrödinger equation for a ‘problem’, results in an expression for the energy of the particle(s) ...
... Where do the energy equations come from? The motion of atoms, molecules, electrons … is described by Quantum Mechanics. The central equation of Quantum Mechanics is the Schrödinger Equation. Solving the Schrödinger equation for a ‘problem’, results in an expression for the energy of the particle(s) ...
Chapter 1 Statistical Mechanics of Quantum Dots Chapter 2 Artificial
... Joint Services Electronics Program Contract DAAL03-92-C-0001 In 1994, we concentrated our research on the dynamical properties of quantum dots. These closed systems which consist of a substantial but finite number of electrons usually demonstrate behavior that is called quantum chaos.' This behavior ...
... Joint Services Electronics Program Contract DAAL03-92-C-0001 In 1994, we concentrated our research on the dynamical properties of quantum dots. These closed systems which consist of a substantial but finite number of electrons usually demonstrate behavior that is called quantum chaos.' This behavior ...
Quantum-limited measurements: One physicist`s crooked path from
... http://info.phys.unm.edu/~caves ...
... http://info.phys.unm.edu/~caves ...
PowerPoint
... Pointer states that exist or evolve predictably in spite of the immersion of the system in the environment. Predictability sieve can be used to ‘sift’ through the Hilbert space of any open quantum system in search of these pointer states. EINSELECTION (or Environment INduced superSELECTION) is the p ...
... Pointer states that exist or evolve predictably in spite of the immersion of the system in the environment. Predictability sieve can be used to ‘sift’ through the Hilbert space of any open quantum system in search of these pointer states. EINSELECTION (or Environment INduced superSELECTION) is the p ...
Lecture 26 - Purdue Physics
... Atomic Quantum Numbers • Sommerfeld extended the Bohr model to account for quantized angular momentum • A new quantum number, ℓ, known as the orbital quantum number, identifies the orbital angular momentum of a state. ...
... Atomic Quantum Numbers • Sommerfeld extended the Bohr model to account for quantized angular momentum • A new quantum number, ℓ, known as the orbital quantum number, identifies the orbital angular momentum of a state. ...
Introduction to Quantum Information Theory
... introduction to quantum information theory by drawing comparisons to classical probability theory. For more details on quantum information theory and computation we refer to [3]. A binary random variable X is a system with two possible states 0 and 1. Similarly, a quantum bit (qubit) is a quantum me ...
... introduction to quantum information theory by drawing comparisons to classical probability theory. For more details on quantum information theory and computation we refer to [3]. A binary random variable X is a system with two possible states 0 and 1. Similarly, a quantum bit (qubit) is a quantum me ...
Philosophy of Science, 69 (September 2002) pp
... In the absence of further knowledge of the mixing process, the possibility of producing (I I)/4 by mixing eigenstates of the Bell operator shows only that there is a nonlocal quantum hidden variables model of the state (I I)/4, not that there can be no local one! So we see that it is in general fal ...
... In the absence of further knowledge of the mixing process, the possibility of producing (I I)/4 by mixing eigenstates of the Bell operator shows only that there is a nonlocal quantum hidden variables model of the state (I I)/4, not that there can be no local one! So we see that it is in general fal ...
Quantum Teleportation
... exact copy rather than an approximate facsimile, and it would destroy the original in the process of scanning it. The teleportation technique makes use of quantum entanglemant. Clouds of trillions of atoms have for the first time being linked by quantum entanglement that spooky almost telepathic lin ...
... exact copy rather than an approximate facsimile, and it would destroy the original in the process of scanning it. The teleportation technique makes use of quantum entanglemant. Clouds of trillions of atoms have for the first time being linked by quantum entanglement that spooky almost telepathic lin ...
Quantum teleportation
Quantum teleportation is a process by which quantum information (e.g. the exact state of an atom or photon) can be transmitted (exactly, in principle) from one location to another, with the help of classical communication and previously shared quantum entanglement between the sending and receiving location. Because it depends on classical communication, which can proceed no faster than the speed of light, it cannot be used for faster-than-light transport or communication of classical bits. It also cannot be used to make copies of a system, as this violates the no-cloning theorem. While it has proven possible to teleport one or more qubits of information between two (entangled) atoms, this has not yet been achieved between molecules or anything larger.Although the name is inspired by the teleportation commonly used in fiction, there is no relationship outside the name, because quantum teleportation concerns only the transfer of information. Quantum teleportation is not a form of transportation, but of communication; it provides a way of transporting a qubit from one location to another, without having to move a physical particle along with it.The seminal paper first expounding the idea was published by C. H. Bennett, G. Brassard, C. Crépeau, R. Jozsa, A. Peres and W. K. Wootters in 1993. Since then, quantum teleportation was first realized with single photons and later demonstrated with various material systems such as atoms, ions, electrons and superconducting circuits. The record distance for quantum teleportation is 143 km (89 mi).