Feynman-diagrams approach to the quantum Rabi model for ultrastrong cavity QED: stimulated emission and reabsorption of virtual particles dressing a physical excitation [PDF]
, 2016 In quantum field theory, bare particles are dressed by a cloud of virtual particles to form physical particles. The virtual particles affect properties such as the mass and charge of the physical particles, and it is only these modified properties that ...
O. D. Stefano +5 more
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Effect of data encoding on the expressive power of variational quantum-machine-learning models [PDF]
Physical Review A, 2020 Quantum computers can be used for supervised learning by treating parametrised quantum circuits as models that map data inputs to predictions. While a lot of work has been done to investigate practical implications of this approach, many important ...
M. Schuld +2 more
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Forty thousand kilometers under quantum protection
Scientific Reports, 2023 Quantum key distribution (QKD) is a revolutionary cryptography response to the rapidly growing cyberattacks threat posed by quantum computing. Yet, the roadblock limiting the vast expanse of secure quantum communication is the exponential decay of the ...
N. S. Kirsanov +7 more
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Quantum transduction is enhanced by single mode squeezing operators
Physical Review Research, 2022 Quantum transduction is an essential ingredient in scaling up distributed quantum architecture and is actively pursued based on various physical platforms.
Changchun Zhong +4 more
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On the Connection Between Quantum Probability and Geometry
Quanta, 2021 We discuss the mathematical structures that underlie quantum probabilities. More specifically, we explore possible connections between logic, geometry and probability theory. We propose an interpretation that generalizes the method developed by R.
Federico Holik
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Spectral Problem of the Hamiltonian in Quantum Mechanics without Reference to a Potential Function
Axioms, 2023 Following the celebrated postulates of quantum mechanics, we write the quantum mechanical wavefunction as a convergent series of suitably selected complete square-integrable basis functions in configuration space. The expansion coefficients of the series
Ibraheem F. Al-Yousef +3 more
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Quantum gate characterization in an extended Hilbert space [PDF]
, 2004 We describe an approach for characterizing the process of quantum gates using quantum process tomography, by first modeling them in an extended Hilbert space, which includes non-qubit degrees of freedom.
G. J. Pryde +5 more
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Cartan Subalgebra Approach to Efficient Measurements of Quantum Observables [PDF]
PRX Quantum, 2020 An arbitrary operator corresponding to a physical observable cannot be measured in a single measurement on currently available quantum hardware. To obtain the expectation value of the observable, one needs to partition its operator to measurable ...
Tzu-Ching Yen, A. Izmaylov
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Neural-Network Approach to Dissipative Quantum Many-Body Dynamics. [PDF]
Physical Review Letters, 2019 In experimentally realistic situations, quantum systems are never perfectly isolated and the coupling to their environment needs to be taken into account.
M. Hartmann, Giuseppe Carleo
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Multiloop functional renormalization group approach to quantum spin systems [PDF]
Physical Review Research, 2020 Renormalization group methods are well-established tools for the (numerical) investigation of the low-energy properties of correlated quantum many-body systems, allowing to capture their scale-dependent nature.
Dominik Kiese +4 more
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