Results 11 to 20 of about 1,414,712 (339)
Physical Review Letters, 2015 Smoothing is an estimation method whereby a classical state (probability distribution for classical variables) at a given time is conditioned on all-time (both past and future) observations.
Guevara, Ivonne, Wiseman, Howard
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Quantum state estimation [PDF]
Physical Review A, 1996 New algorithm for quantum state estimation based on the maximum likelihood estimation is proposed. Existing techniques for state reconstruction based on the inversion of measured data are shown to be overestimated since they do not guarantee the positive
C. W. Helstrom, J. Perina, Z. Hradil
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Quantum State Combinatorics. [PDF]
Entropy (Basel)This paper concerns the analysis of large quantum states. It is a notoriously difficult problem to quantify separability of quantum states, and for large quantum states, it is unfeasible. Here we posit that when quantum states are large, we can deduce reasonable expectations for the complex structure of non-classical multipartite correlations with ...
Scholes GD.
europepmc +4 more sources
Quantum State Assignment Flows. [PDF]
Entropy (Basel), 2023 This paper introduces assignment flows for density matrices as state spaces for representation and analysis of data associated with vertices of an underlying weighted graph. Determining an assignment flow by geometric integration of the defining dynamical system causes an interaction of the non-commuting states across the graph, and the assignment of a
Schwarz J +5 more
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Preparation of Quantum Superposition Using Partial Negation
IEEE Access, 2022 The preparation of a quantum superposition is the key to the success of many quantum algorithms and quantum machine learning techniques. The preparation of an incomplete or a non-uniform quantum superposition with certain properties is a non-trivial task.
Sara Anwer +3 more
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Nanomaterials, 2023 Using density functional theory in the noncollinear approximation, the behavior of quantum states of hole qubits in a Ge/Co:ZnO system was studied in this work.
Andrey N. Chibisov +5 more
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Quantum State Interferography [PDF]
Physical Review Letters, 2020 Quantum State Tomography (QST) has been the traditional method for characterization of an unknown state. Recently, many direct measurement methods have been implemented to reconstruct the state in a resource efficient way. In this letter, we present an interferometric method, in which, any qubit state, whether mixed or pure, can be inferred from the ...
Surya Narayan Sahoo +3 more
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Entropy of Quantum States [PDF]
Entropy, 2021 Given the algebra of observables of a quantum system subject to selection rules, a state can be represented by different density matrices. As a result, different von Neumann entropies can be associated with the same state. Motivated by a minimality property of the von Neumann entropy of a density matrix with respect to its possible decompositions into ...
Paolo Facchi +2 more
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Holographic Quantum States [PDF]
Physical Review Letters, 2010 We show how continuous matrix product states of quantum field theories can be described in terms of the dissipative non-equilibrium dynamics of a lower-dimensional auxiliary boundary field theory. We demonstrate that the spatial correlation functions of the bulk field can be brought into one-to-one correspondence with the temporal statistics of the ...
Tobias J. Osborne +2 more
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A p-Adic Model of Quantum States and the p-Adic Qubit
Entropy, 2022 We propose a model of a quantum N-dimensional system (quNit) based on a quadratic extension of the non-Archimedean field of p-adic numbers. As in the standard complex setting, states and observables of a p-adic quantum system are implemented by suitable ...
Paolo Aniello +2 more
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