Results 31 to 40 of about 6,748,421 (282)
On quantum phase crossovers in finite systems [PDF]
, 2006 In this work we define a formal notion of a quantum phase crossover for certain Bethe ansatz solvable models. The approach we adopt exploits an exact mapping of the spectrum of a many-body integrable system, which admits an exact Bethe ansatz solution ...
Hibberd, Katrina E. +2 more
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Quantum Information in Geometric Quantum Mechanics [PDF]
, 2011 A fundamental starting point in quantum information theory is the consideration of the von Neumann entropy and its generalization to relative quantum entropies.
Volkert, Georg Friedrich
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Filtered quantum phase estimation
Quantum Science and TechnologyAbstract Accurate state preparation is a critical bottleneck in many quantum algorithms, particularly those for ground-state energy estimation. Even in fault-tolerant quantum computing, preparing a quantum state with sufficient overlap with the desired eigenstate remains a major challenge.
Gwonhak Lee +4 more
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Quantum-enhanced magnetometry by phase estimation algorithms with a single artificial atom [PDF]
, 2018 Phase estimation algorithms are key protocols in quantum information processing. Besides applications in quantum computing, they can also be employed in metrology as they allow for fast extraction of information stored in the quantum state of a system ...
Blatter, G. +14 more
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Quantum eigenvalue estimation via time series analysis
New Journal of Physics, 2019 We present an efficient method for estimating the eigenvalues of a Hamiltonian H from the expectation values of the evolution operator for various times.
Rolando D Somma
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Lower bound for quantum phase estimation [PDF]
Physical Review A, 2005 7 pages, 1 ...
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Quantum phase estimation with lossy interferometers
, 2009 We give a detailed discussion of optimal quantum states for optical two-mode interferometry in the presence of photon losses. We derive analytical formulae for the precision of phase estimation obtainable using quantum states of light with a definite ...
Lundeen, J. S. +16 more
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, 2021 | openaire: EC/H2020/862644/EU//QUARTETQuantum phase estimation is a paradigmatic problem in quantum sensing and metrology. Here we show that adaptive methods based on classical machine learning algorithms can be used to enhance the precision of quantum ...
Paraoanu, Gheorghe Sorin +7 more
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Adiabatic quantum counting by geometric phase estimation [PDF]
Quantum Information Processing, 2009 We design an adiabatic quantum algorithm for the counting problem, i.e., approximating the proportion, $α$, of the marked items in a given database. As the quantum system undergoes a designed cyclic adiabatic evolution, it acquires a Berry phase $2πα$. By estimating the Berry phase, we can approximate $α$, and solve the problem. For an error bound $ε$,
Chi Zhang 0059 +2 more
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Quantum Neural Network Based on Swap Test and Phase Estimation [PDF]
Jisuanji kexue yu tansuoTo address the integration of quantum computing and neural computing, this paper investigates a quantum neural network (QNN) model and its algorithm based on swap test and phase estimation.
LI Panchi, LIU Guangshuo
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