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Longer titles found: Density matrix embedding theory (view), Density matrix renormalization group (view)

searching for Density matrix 79 found (368 total)

CONQUEST (655 words) [view diff] exact match in snippet view article find links to article

density matrix, ρ ( r , r ′ ) {\displaystyle \rho (\mathbf {r} ,\mathbf {r} ^{\prime })} . To make the problem computationally tractable, the density

Hierarchical equations of motion (1,400 words) [view diff] exact match in snippet view article find links to article

is a non-perturbative approach developed to study the evolution of a density matrix ρ ( t ) {\displaystyle \rho (t)} of quantum dissipative systems. The

Redfield equation (2,046 words) [view diff] exact match in snippet view article find links to article

Markovian master equation that describes the time evolution of the reduced density matrix ρ of a strongly coupled quantum system that is weakly coupled to an

Steven R. White (506 words) [view diff] case mismatch in snippet view article find links to article

superconductors and quantum spin liquids. He is most known for inventing the Density Matrix Renormalization Group (DMRG) in 1992. This is a numerical variational

Werner state (1,329 words) [view diff] exact match in snippet view article find links to article

d^{2}} × d 2 {\displaystyle d^{2}} -dimensional bipartite quantum state density matrix that is invariant under all unitary operators of the form U ⊗ U {\displaystyle

Arrow of time (3,850 words) [view diff] exact match in snippet view article find links to article

applicable density matrix, the conventional theory's inability to predict actual measurement outcomes via non-unitary collapse remains. That is, the density matrix

Quantum Fisher information (4,474 words) [view diff] exact match in snippet view article find links to article

{\displaystyle \vert k\rangle } are the eigenvalues and eigenvectors of the density matrix ϱ , {\displaystyle \varrho ,} respectively, and the summation goes over

Mulliken population analysis (884 words) [view diff] exact match in snippet view article find links to article

Cμi for the μ'th basis function in the i'th molecular orbital, the density matrix terms are: D μ ν = 2 ∑ i C μ i C ν i ∗ {\displaystyle \mathbf {D_{\mu

Entanglement distillation (6,316 words) [view diff] exact match in snippet view article find links to article

is sent into a quantum channel emerges as the state represented by density matrix p {\displaystyle p} , the fidelity of transmission is defined as F =

Dephasing (823 words) [view diff] exact match in snippet view article find links to article

coherence of a sample is explained by the off-diagonal elements of a density matrix. An external electric or magnetic field can create coherences between

Vibronic coupling (2,760 words) [view diff] exact match in snippet view article find links to article

complete basis set (CBS) limit, knowledge of the reduced transition density matrix between a pair of states (both at the unperturbed geometry) suffices

Bahram Askerov (274 words) [view diff] exact match in snippet view article find links to article

applicable. B.M.Askerov generalized the W.W.Adams and L.J.Goldstein's density matrix method, underlying the quantum theory of transverse thermomagnetic phenomena

Quantum crystallography (1,317 words) [view diff] exact match in snippet view article find links to article

enables mapping the one-electron distribution or the elements of a density matrix. The kind of radiation and scattering determines the quantity which

Werner Israel (1,661 words) [view diff] exact match in snippet view article find links to article

most directly described by a thermal density matrix. However, it is possible to "purify" such a thermal density matrix as a pure state of a doubled system

Open quantum system (3,211 words) [view diff] exact match in snippet view article find links to article

equations of motion, also known as master equations, that govern how the density matrix describing the system changes over time and the dynamics of the observables

Quantum stochastic calculus (3,148 words) [view diff] exact match in snippet view article find links to article

space of dimension d, the amount of real numbers required to store the density matrix is of order d2, and the time required to compute the master equation

Many-body localization (3,105 words) [view diff] exact match in snippet view article find links to article

This question can be formalized by considering the quantum mechanical density matrix ρ of the system. If the system is divided into a subregion A (the region

Quil (instruction set architecture) (920 words) [view diff] case mismatch in snippet view article

Classical/Quantum Approach for Large-Scale Studies of Quantum Systems with Density Matrix Embedding Theory". arXiv:1610.06910 [quant-ph]. Farhi, Edward; Goldstone

Møller–Plesset perturbation theory (2,899 words) [view diff] exact match in snippet view article find links to article

non-existent, depending on the precise chemical system or basis set. The density matrix for the first-order and higher MP2 wavefunction is of the type known

Kôdi Husimi (796 words) [view diff] exact match in snippet view article find links to article

1143/PTPS.105.78 Kôdi Husimi (1940), "Some formal properties of the density matrix", Proc. Phys.-Math. Soc. Jpn., 22: 264–314. Groß, Christian (2012),

Nonlinear eigenproblem (1,767 words) [view diff] no match in snippet view article find links to article

eigenvalue problems as well as nonlinear eigenvalue problems, designed from density-matrix representation in quantum mechanics combined with contour integration

Phase space (2,123 words) [view diff] exact match in snippet view article find links to article

are obtained isomorphically to tracing operator observables with the density matrix in Hilbert space: they are obtained by phase-space integrals of observables

Triatomic hydrogen (2,092 words) [view diff] exact match in snippet view article find links to article

David A. (5 October 2015). "Structure of the one-electron reduced density matrix from the generalized Pauli exclusion principle". International Journal

Wigner's friend (4,516 words) [view diff] exact match in snippet view article find links to article

expresses this as follows: “There is a paradox only if we suppose that a density matrix (i.e. a probability distribution) is something ‘physically real’ and

Sourav Pal (1,184 words) [view diff] exact match in snippet view article find links to article

obtain the derivative of the KS matrix using the finite field; the density matrix derivative is obtained by a single-step CPKS solution followed by the

Quantum refereed game (3,254 words) [view diff] exact match in snippet view article find links to article

only one turn per game. The game works by having each player send a density matrix to the referee who then plugs those states into his quantum circuit

Frequency domain decomposition (308 words) [view diff] exact match in snippet view article find links to article

frequency response given (multi-)output data. Estimate the power spectral density matrix G ^ y y ( j ω ) {\displaystyle {\hat {G}}_{yy}(j\omega )} at discrete

Reduction criterion (656 words) [view diff] exact match in snippet view article find links to article

H_{2}.} An (un-normalized) mixed state ρ is a positive linear operator (density matrix) acting on H. A linear map Φ: L(H2) → L(H1) is said to be positive if

Sandu Popescu (1,681 words) [view diff] exact match in snippet view article find links to article

pure bi-partite quantum states (the von Neumann entropy of the reduced density matrix). With Daniel Rohrlich, Popescu showed that nonlocal correlations stronger

Aditi Sen De (1,022 words) [view diff] no match in snippet view article find links to article

particular the formulation of a computable entanglement measure and a novel density-matrix recursion method. Her work also involves understanding the theory of

Quasiprobability distribution (3,389 words) [view diff] exact match in snippet view article find links to article

P is often a distribution. Q is always broader than P for the same density matrix. For example, for a thermal state, ρ ^ = 1 n ¯ + 1 ∑ n = 0 ∞ ( n ¯ 1

Distributed multipole analysis (933 words) [view diff] exact match in snippet view article find links to article

takes the form of a sum of products of the basis functions, called density matrix elements. Boys (1950) showed that the product of two spherical Gaussian

George M. Whitesides (3,208 words) [view diff] exact match in snippet view article find links to article

studied spin–spin coupling in a variety of organic compounds, using density matrix calculations to examine the spin systems that NMR analyses detect. Whitesides

Ability (magazine) (1,134 words) [view diff] exact match in snippet view article

in both content and form and is the first to embed VOICEYE (a high-density matrix barcode system) on its editorial pages to hear print through smartphones

Range criterion (580 words) [view diff] exact match in snippet view article find links to article

\;\{v_{i}\}} . The range criterion is a special case of this fact. A density matrix ρ acting on H is separable if and only if it can be written as ρ = ∑

Range criterion (580 words) [view diff] exact match in snippet view article find links to article

\;\{v_{i}\}} . The range criterion is a special case of this fact. A density matrix ρ acting on H is separable if and only if it can be written as ρ = ∑

Schrödinger Medal (122 words) [view diff] exact match in snippet view article find links to article

and his fundamental contributions to density functional theory and density matrix theory" 2011 Peter Gill "For his outstanding contributions to intracules

Evert Jan Baerends (302 words) [view diff] exact match in snippet view article find links to article

and his fundamental contributions to density functional theory and density matrix theory." Baerends is a member of the International Academy of Quantum

Simone Severini (333 words) [view diff] case mismatch in snippet view article find links to article

Sibasish; Severini, Simone (2006). "The Laplacian of a Graph as a Density Matrix: A Basic Combinatorial Approach to Separability of Mixed States". Annals

N-electron valence state perturbation theory (3,299 words) [view diff] exact match in snippet view article find links to article

Strongly Contracted development. To evaluate these norms, the spinless density matrix of rank not higher than three between the Ψ m ( 0 ) {\displaystyle \Psi

LOCC (3,095 words) [view diff] exact match in snippet view article find links to article

statistics are exactly the same (both states have the same reduced density matrix). E.g., assume that Alice measures the first qubit, and obtains the

Quantum Heisenberg model (2,733 words) [view diff] exact match in snippet view article find links to article

provides an important and tractable theoretical example for applying density matrix renormalisation. The six-vertex model can be solved using the algebraic

Vladimir Korepin (1,704 words) [view diff] exact match in snippet view article find links to article

Korepin evaluated the entanglement entropy and studied the reduced density matrix. He also worked on quantum search algorithms with Lov Grover. Many of

Vitamin K (7,834 words) [view diff] no match in snippet view article find links to article

shown to lower this ratio and improve lumbar vertebrae bone mineral density. Matrix Gla protein must undergo vitamin K dependent phosphorylation and carboxylation

Quantum programming (4,516 words) [view diff] case mismatch in snippet view article find links to article

Classical/Quantum Approach for Large-Scale Studies of Quantum Systems with Density Matrix Embedding Theory". arXiv:1610.06910 [quant-ph]. Farhi, Edward; Goldstone

Entanglement of formation (828 words) [view diff] exact match in snippet view article find links to article

S ( ρ B ) {\displaystyle S(\rho _{A})=S(\rho _{B})} of the reduced density matrix can be used to measure the entanglement of the state | ψ ⟩ A B {\displaystyle

Two-dimensional nuclear magnetic resonance spectroscopy (3,715 words) [view diff] case mismatch in snippet view article find links to article

Inc. p. 59. Mateescu, Gheorghe D.; Valeriu, Adrian (1993). 2D NMR Density Matrix and Product Operator Treatment. Englewood Cliffs, New Jersey: PTR Prentice

Supernova neutrinos (4,418 words) [view diff] exact match in snippet view article find links to article

flavor evolution of neutrinos for each energy mode is described by the density matrix: ρ ^ t ( E , R ) = ∑ α = e , μ , τ L ν α e − t τ ⟨ E ν α ⟩ f ν α ( E

Wick's theorem (3,659 words) [view diff] exact match in snippet view article find links to article

theory a different type of expectation value, a thermal trace over the density matrix, requires a different definition of normal ordering. Isserlis' theorem

Product operator formalism (5,744 words) [view diff] exact match in snippet view article find links to article

results in NMR spectroscopy and is a simplification of the complete density matrix formalism. In this model, for a single spin, four base operators exist:

Electric dipole moment (7,940 words) [view diff] exact match in snippet view article find links to article

theory, either as a response to constant electric fields or from the density matrix. Such values however are not directly comparable to experiment due to

Mike Williams (physicist) (705 words) [view diff] exact match in snippet view article

London Thesis Measurement of the differential cross section and spin density matrix elements along with a partial wave analysis for gamma p to omega p using

Bayesian operational modal analysis (1,100 words) [view diff] exact match in snippet view article find links to article

OMA in the time domain and in the frequency domain using the spectral density matrix and fast Fourier transform (FFT) of ambient vibration data. Based on

Paul Painlevé (2,629 words) [view diff] exact match in snippet view article find links to article

Jimbo, Michio; Tetsuji Miwa; Yasuko Môri; Mikio Sato (April 1980). "Density matrix of an impenetrable Bose gas and the fifth Painlevé transcendent". Physica

AKLT model (1,815 words) [view diff] no match in snippet view article find links to article

1103/physrevb.84.235141. S2CID 55330505. Schollwöck, Ulrich (2011). "The density-matrix renormalization group in the age of matrix product states". Annals of

Exceptional point (772 words) [view diff] case mismatch in snippet view article find links to article

higher-order. Many numerical methods such as the Lanczos algorithm, Density Matrix Renormalization Group (DMRG), and other tensor network algorithms are

Victor Savrin (707 words) [view diff] exact match in snippet view article find links to article

hadronic interactions, and in 1978 he defended his D.Sc. thesis, titled A density matrix method in the theory of inclusive reactions. From 1983 Victor Savrin

Bispinor (3,655 words) [view diff] exact match in snippet view article find links to article

Rembieliński, Jakub (5 July 2005). "Lorentz-covariant reduced spin density matrix and Einstein-Podolsky-Rosen–Bohm correlations". Physical Review A. 72

Isomonodromic deformation (2,929 words) [view diff] exact match in snippet view article find links to article

Jimbo, Michio; Miwa, Tetsuji; Môri, Yasuko; Sato, Mikio (April 1980). "Density matrix of an impenetrable Bose gas and the fifth Painlevé transcendent". Physica

Kameshwar C. Wali (2,871 words) [view diff] case mismatch in snippet view article find links to article

Pierre; Wali, Kameshwar C. (1 February 1973). "Properties of Polarization Density Matrix in Regge-Pole Models". Physical Review D. 7 (3): 815–835. Bibcode:1973PhRvD

Giacomo Mauro D'Ariano (1,578 words) [view diff] exact match in snippet view article find links to article

G. M.; MacChiavello, C.; Paris, M. G. A. (1994). "Detection of the density matrix through optical homodyne tomography without filtered back projection"

Neepa Maitra (853 words) [view diff] no match in snippet view article find links to article

263401. PMID 29328727.< Lacombe, Lionel; Maitra, Neepa T. (2019-03-12). "Density-Matrix Coupled Time-Dependent Exchange-Correlation Functional Approximations"

Lieb–Oxford inequality (1,922 words) [view diff] exact match in snippet view article find links to article

\sigma _{N})|^{2}.} Alternatively, if the system is described by a density matrix γ, then P is the diagonal γ ( x 1 , . . . , x N ; x 1 , . . . , x N

Spin contamination (2,825 words) [view diff] exact match in snippet view article find links to article

approach involves the annihilation of first spin contaminant of the density matrix at each step in the self-consistent solution of the Hartree–Fock equations

Deformation quantization (1,102 words) [view diff] exact match in snippet view article find links to article

obtained isomorphically to tracing operator observables Φ with the density matrix in Hilbert space: they are obtained by phase-space integrals of observables

Resonance fluorescence (5,610 words) [view diff] exact match in snippet view article find links to article

Since this correlation function includes the steady state limits of the density matrix, where ρ + + s . s ⇒ 1 2 {\displaystyle \rho _{++}^{s.s}\Rightarrow

Nabil M. Lawandy (1,624 words) [view diff] exact match in snippet view article find links to article

doi:10.1103/PhysRevA.25.433. Ryan, J.; Lawandy, N. (November 1986). "Density matrix solutions for the susceptibilities of a three-level system with arbitrary

Germán Sierra (5,133 words) [view diff] exact match in snippet view article find links to article

(1998). Equivalence of the variational matrix product method and the density matrix renormalization group applied to spin chains. Europhysics letters, 43(4)

Multipolar exchange interaction (3,758 words) [view diff] exact match in snippet view article find links to article

super basis. Therefore, for a J = 1 {\displaystyle J=1} system, its density matrix must have quadrupole components. This is the reason why a J > 1 / 2

Squeezed states of light (6,180 words) [view diff] exact match in snippet view article find links to article

sufficient for a full characterization of a squeezed state and the full density matrix in the basis of the number states has to be determined.) Spin squeezed

Helmut Ritsch (1,035 words) [view diff] exact match in snippet view article find links to article

a computational tool used in dissipative systems to approximate the density matrix of a quantum system. The method was developed in 1992 independently

Principal interacting orbital (1,195 words) [view diff] exact match in snippet view article find links to article

structure. Run NBO analysis to obtain the NAO basis and corresponding density matrix. Run PIO analysis. The PIO analysis is based on the statistical method

Dicke model (4,376 words) [view diff] exact match in snippet view article find links to article

master equation in Lindblad form Here, ρ {\displaystyle \rho } is the density matrix of the system, L α {\displaystyle L_{\alpha }} is the Lindblad operator

Coherent effects in semiconductor optics (4,788 words) [view diff] exact match in snippet view article find links to article

Axt, V. M.; Stahl, A. (1994). "The role of the biexciton in a dynamic density matrix theory of the semiconductor band edge". Zeitschrift für Physik B Condensed

Continuous spontaneous localization model (4,978 words) [view diff] exact match in snippet view article find links to article

basis, it becomes clear that its direct action is to diagonalize the density matrix in position. For a single point-like particle of mass m {\displaystyle

Chin-Sen Ting (1,898 words) [view diff] exact match in snippet view article find links to article

his group explored the extended spin-1/2 honeycomb XY model using density matrix renormalization group theory, revealing the emergence of chiral spin

Kolkata Paise Restaurant Problem (5,699 words) [view diff] exact match in snippet view article find links to article

operations can always affect the joint state and hence the reduced density matrix for B may change. Clearly, if we allow non-local operations, then stirring

Dicke state (2,463 words) [view diff] exact match in snippet view article find links to article

detect multipartite entanglement of noisey Dicke states based on their density matrix. For an N {\displaystyle N} -qubit quantum state, F Q [ ϱ , J l ] ≤

Jose Luis Mendoza-Cortes (17,956 words) [view diff] no match in snippet view article find links to article

2 ps each) were run from 300 K up to 2 500 K using the atom-centred density-matrix-propagation method, revealing how hydrogen bonding, π–π stacking and