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QxBranch was founded in 2014 as a joint spin-off of Shoal Group and The Tauri Group to commercialize quantum computing technology. [11] Shoal Group (named Aerospace Concepts at the time) had a research agreement with Lockheed Martin to access a D-Wave Two quantum computer, and transitioned the access and associated technology to help found QxBranch.
Circuit implementing the swap test between two states | and | The swap test is a procedure in quantum computation that is used to check how much two quantum states differ, appearing first in the work of Barenco et al. [ 1 ] and later rediscovered by Harry Buhrman , Richard Cleve , John Watrous , and Ronald de Wolf . [ 2 ]
These quantum numbers are labels identifying the hadrons, and are of two kinds. One set comes from the Poincaré symmetry—J PC, where J, P and C stand for the total angular momentum, P-symmetry, and C-symmetry, respectively. The other set is the flavor quantum numbers such as the isospin, strangeness, charm, and so on. The strong interactions ...
Quantum chemistry computer programs are used in computational chemistry to implement the methods of quantum chemistry. Most include the Hartree–Fock (HF) and some post-Hartree–Fock methods. They may also include density functional theory (DFT), molecular mechanics or semi-empirical quantum chemistry methods .
Probability amplitudes provide a relationship between the quantum state vector of a system and the results of observations of that system, a link that was first proposed by Max Born, in 1926. Interpretation of values of a wave function as the probability amplitude is a pillar of the Copenhagen interpretation of quantum mechanics.
A reversible gate is a reversible function on n-bit data that returns n-bit data, where an n-bit data is a string of bits x 1,x 2, ...,x n of length n. The set of n-bit data is the space {0,1} n, which consists of 2 n strings of 0's and 1's. More precisely: an n-bit reversible gate is a bijective mapping f from the set {0,1} n of n-bit data ...
The Schönhage–Strassen algorithm was the asymptotically fastest multiplication method known from 1971 until 2007. It is asymptotically faster than older methods such as Karatsuba and Toom–Cook multiplication, and starts to outperform them in practice for numbers beyond about 10,000 to 100,000 decimal digits. [2]
A Feynman diagram is a graphical representation of a perturbative contribution to the transition amplitude or correlation function of a quantum mechanical or statistical field theory. Within the canonical formulation of quantum field theory, a Feynman diagram represents a term in the Wick's expansion of the perturbative S-matrix.