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using standard syste - the Max Planck Institute for the Physics of
using standard syste - the Max Planck Institute for the Physics of

... self-consistent-field method shortly after the new quantum theory was established. They can be handled to such accuracy today that they are used for highprecision measurements and calculations to improve on the fundamental physical constants. Doubly excited resonant states could not, on the other ha ...
OPENNESS OF MANY-ELECTRON QUANTUM SYSTEMS FROM
OPENNESS OF MANY-ELECTRON QUANTUM SYSTEMS FROM

... ditions on the 1-RDM are required to ensure that it arises •  A general from N-fermion pure state outermatrix product of the Nthe integration of is anexpressible N -fermion by purethe density eneral N -fermion fermion wave function ermion ensemble N D(1, 2, .., N ; 1̄, 2̄, .., N̄ ) = Ψ(1, 2, .., N ) ...
Nonlocality and entanglement in Generalized
Nonlocality and entanglement in Generalized

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Chapter 7 Quantum Error Correction

... this condition is readily understood — were it otherwise, in identifying an error subspace Ha we would acquire some information about the encoded state, and so would inevitably disturb that state. To prove that the condition eq. (7.19) is necessary and sufficient, we invoke the theory of superoperat ...
Entanglement Theory and the Quantum
Entanglement Theory and the Quantum

Spin Squeezing, Macrorealism and the Heisenberg uncertainty
Spin Squeezing, Macrorealism and the Heisenberg uncertainty

Modeling quantum fluid dynamics at nonzero temperatures
Modeling quantum fluid dynamics at nonzero temperatures

... temperature in such systems. The Landau two-fluid model is the most successful hydrodynamical theory of superfluid helium, but by the nature of the scale separations it cannot give an adequate description of the processes involving vortex dynamics and interactions. In our contribution we introduce a ...
Exploring topological phases with quantum walks
Exploring topological phases with quantum walks

... experiments [11,12,14,15] realizes a nontrivial 1D topological phase. This topological phase is analogous to that of the Su-Schrieffer-Heeger (SSH) model of polyacetylene [17]. The topology of this phase is characterized by a nonzero winding of the spinor eigenstates on a great circle of the Bloch s ...
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Holonomic Quantum Control with Continuous

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Introduction to Group Field Theory

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Preparing projected entangled pair states on a quantum computer

... Growing G-injective PEPS • Generalization of the basic algorithm – A related G-isometric PEPS is prepared deterministically by known methods[9,10] to enter the G-invariant subspace first – The G-isometric PEPS is then transformed into the G-injective PEPS as before, maintaining the G-invariant subs ...
Applied Bohmian mechanics
Applied Bohmian mechanics

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Canonical Transformations in Quantum Mechanics

... Once the Hilbert space of physical states is specified, one may find that the kernel of a particular canonical transformation lies in the Hilbert space or that the normalization of states changes under the transformation. In these cases, the canonical transformation is non-unitary, but nevertheless ...
Spin and Charge Transport through Driven Quantum Dot Systems
Spin and Charge Transport through Driven Quantum Dot Systems

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Spectroscopy - Metameso.org

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PHOTONIC ENTANGLEMENT: NEW SOURCES AND NEW APPLICATIONS JI ˇ R´

... the last few decades. In order to be used in many different applications, sources of entanglement should satisfy several requirements as a high efficiency, broad tunability and compactness, and the possibility of integration with other optical components. The most common sources of entangled fields ...
Boundary conditions for integrable quantum systems
Boundary conditions for integrable quantum systems

... Boundary conditions for integrable quantum systems ...
Characterizing and witnessing multipartite correlations: from nonlocality to contextuality PhD thesis
Characterizing and witnessing multipartite correlations: from nonlocality to contextuality PhD thesis

... have witnessed phenomena in Nature which challenge our everyday classical intuition. In order to explain these facts, quantum theory was developed, which so far has been able to reproduce the observed results. However, I believe that our understanding of quantum mechanics can be significantly improv ...
Spin Squeezing, Entanglement and Quantum Metrology
Spin Squeezing, Entanglement and Quantum Metrology

Quantum Measurement Theory
Quantum Measurement Theory

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Twenty years of the Weyl anomaly

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Two Qubits Tavis-Cummings Model Beyond the Rotating Wave

quantum mechanical methods for enzyme kinetics
quantum mechanical methods for enzyme kinetics

Information measures, entanglement and quantum evolution Claudia Zander
Information measures, entanglement and quantum evolution Claudia Zander

... quantum information theory [21]. It also constitutes a rather useful heuristic tool for establishing new links between, or obtaining new derivations of, fundamental aspects of thermodynamics and other areas of physics [22]. Information is something that is encoded in a physical state of a system an ...
The Role of Indistinguishability of Identical Particles in
The Role of Indistinguishability of Identical Particles in

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Quantum computing



Quantum computing studies theoretical computation systems (quantum computers) that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. Quantum computers are different from digital computers based on transistors. Whereas digital computers require data to be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits (qubits), which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. Quantum computers share theoretical similarities with non-deterministic and probabilistic computers. The field of quantum computing was initiated by the work of Yuri Manin in 1980, Richard Feynman in 1982, and David Deutsch in 1985. A quantum computer with spins as quantum bits was also formulated for use as a quantum space–time in 1968.As of 2015, the development of actual quantum computers is still in its infancy, but experiments have been carried out in which quantum computational operations were executed on a very small number of quantum bits. Both practical and theoretical research continues, and many national governments and military agencies are funding quantum computing research in an effort to develop quantum computers for civilian, business, trade, and national security purposes, such as cryptanalysis.Large-scale quantum computers will be able to solve certain problems much more quickly than any classical computers that use even the best currently known algorithms, like integer factorization using Shor's algorithm or the simulation of quantum many-body systems. There exist quantum algorithms, such as Simon's algorithm, that run faster than any possible probabilistic classical algorithm.Given sufficient computational resources, however, a classical computer could be made to simulate any quantum algorithm, as quantum computation does not violate the Church–Turing thesis.
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