Results 21 to 30 of about 727,743 (336)
Quantum inflaton dynamics [PDF]
Physical Review D, 1998 We show that the quantum dynamics of a real scalar field for a large class of potentials in the symmetric Gaussian state, where the nonperturbative quantum contributions are taken into account, can be described equivalently by a two-dimensional nonlinear dynamical system with a definite angular momentum (U(1) charge of a complex theory).
Bak, Dongsu +4 more
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Foundations of Physics, 2023 Quantum uncertainty relations have deep-rooted significance on the formalism of quantum mechanics. Heisenberg's uncertainty relations attracted a renewed interest for its applications in quantum information science. Robertson derived a general form of Heisenberg's uncertainty relations for a pair of arbitrary observables represented by Hermitian ...
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Simulating quantum dynamics on a quantum computer [PDF]
Journal of Physics A: Mathematical and Theoretical, 2011 Paper modified from previous version to enhance clarity.
Wiebe, Nathan +3 more
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Dynamical quantum tomography [PDF]
Journal of Mathematical Physics, 2016 We consider quantum state tomography with measurement procedures of the following type: First, we subject the quantum state we aim to identify to a known time evolution for a desired period of time. Afterwards we perform a measurement with a fixed measurement setup.
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NON-COMMUTATIVE QUANTUM DYNAMICS [PDF]
Modern Physics Letters A, 1993 We described a q-deformation of a quantum dynamics in one dimension. We prove that there exists only one essential deformation of quantum dynamics.
Rembieliński, Jakub +1 more
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Quantum non-Markovian piecewise dynamics from collision models [PDF]
, 2017 Recently, a large class of quantum non-Markovian piecewise dynamics for an open quantum system obeying closed evolution equations has been introduced [B. Vacchini, Phys. Rev. Lett. 117, 230401 (2016)].
Ciccarello, Francesco +3 more
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Experimental optical phase measurement approaching the exact Heisenberg limit
Nature Communications, 2018 Measurements of an unknown optical phase have not yet been performed with the ultimate precision, i.e. saturating the Heisenberg limit. Here, Daryanoosh et al.
Shakib Daryanoosh +4 more
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A possibilistic no-go theorem on the Wigner’s friend paradox
New Journal of Physics, 2023 The famous ‘Wigner’s friend’ paradox highlights the difficulty of modelling the evolution of quantum systems under measurement in situations where observers themselves are considered to be subject to the laws of quantum mechanics.
Marwan Haddara, Eric G Cavalcanti
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Experimental noiseless linear amplification using weak measurements
New Journal of Physics, 2016 The viability of quantum communication schemes rely on sending quantum states of light over long distances. However, transmission loss can degrade the signal strength, adding noise.
Joseph Ho +3 more
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Evaluation of the importance of spin-orbit couplings in the nonadiabatic quantum dynamics with quantum fidelity and with its efficient "on-the-fly" ab initio semiclassical approximation [PDF]
, 2012 We propose to measure the importance of spin-orbit couplings (SOCs) in the nonadiabatic molecular quantum dynamics rigorously with quantum fidelity. To make the criterion practical, quantum fidelity is estimated efficiently with the multiple-surface ...
Child M. S. +2 more
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