Results 101 to 110 of about 18,586 (189)

Decoherence in neutron interferometry

, 2000
The coherence properties of a neutron are analyzed by making use of the Wigner quasi-distribution function. We discuss, in particular, highly non-classical, SchroK dinger-cat-like neutron states that can be obtained in an interferometer or in a magnetic ...
P Facchi, FACCHI, PAOLO, A Mariano, S Pascazio, PASCAZIO, Saverio, Mariano A   +5 more
core   +1 more source

Decoherence in quantum mechanics

, 2011
We study decoherence in a simple quantum mechanical model using two approaches. Firstly, we follow the conventional approach to decoherence where one is interested in solving the reduced density matrix from the perturbative master equation.
Prokopec, T., Sub Algemeen Theoretical Physics, Schmidt, M.G., Sub String Theory Cosmology and ElemPart, Jurjen F. Koksma, Michael G. Schmidt, Theoretical Physics, Tomislav Prokopec, Koksma, J.F.   +8 more
core   +1 more source

Decoherence of histories: Chaotic versus integrable systems

arXiv:2406.15577v3We study the emergence of decoherent histories in isolated systems based on exact numerical integration of the Schrödinger equation for a Heisenberg chain. We reveal that the nature of the system, which we switch from (i) chaotic to (ii)
Strasberg, Philipp, Wang, Jiaozi
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Time scale of stationary decoherence

, 2017
International audienceThe decoherence of a test particle interacting with an ideal gas is studied by the help of the effective Lagrangian, derived in the leading order of the perturbation expansion and in order O(∂t2).
Polonyi, Janos, Janos Polonyi
core   +1 more source

Does the quantum mechanical wave function exist?

Zagadnienia Filozoficzne w Nauce, 2019
I address the question whether the wave function in quantum theory exists as a real (ontic) quantity or not. For this purpose, I discuss the essentials of the quantum formalism and emphasize the central role of the superposition principle. I then explain
Claus Kiefer
doaj  

Intrinsic decoherence in the interaction of two fields with a two-level atom [PDF]

, 2009
We study the interaction of a two-level atom and two fields, one of them classical. We obtain an effective Hamiltonian for this system by using a method recently introduced that produces a small rotation to the Hamiltonian that allows to neglect some ...
JOSE LUIS ESCUDERO JIMENEZ, RAUL JUAREZ AMARO, HECTOR MANUEL MOYA CESSA   +2 more
core  

Completely positive non-Markovian decoherence

, 2004
We propose an effective Hamiltonian approach to investigate decoherence of a quantum system in a non-Markovian reservoir, naturally imposing the complete positivity on the reduced dynamics of the system.
Lee, J., Kim, Myung, Ahn, D., Kim, I., McAneney, Helen   +4 more
core  

Decoherence without dissipation

, 2001
The prototypical Schrödinger cat state, i.e., an initial state corresponding to two widely separated Gaussian wave packets, is considered. The decoherence time is calculated solely within the framework of elementary quantum mechanics and equilibrium ...
O\u27Connell, R. F., Ford, G. W., R.F. O'Connell, G.W. Ford   +3 more
core   +1 more source

Mechanism of Polariton Decoherence in the Collective Light-Matter Couplings Regime

Molecular polaritons, the hybridization of electronic states in molecules with photonic excitation inside a cavity, play an important role in fundamental quantum science and technology.
Todd, Krauss, Benjamin X. K. , Chng, Yifan, Lai, A. Nickolas, Vamivakas, Pengfei, Huo, Wenxiang, Ying, Steven T. , Cundiff   +6 more
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Decoherence ของ Density Matrix ในลิมิตที่เวลามีค่ามากๆ

, 2008
เราได้แสดงให้เห็นว่า decoherence เกิดขึ้นได้โดยมีเพียงอันตรกิริยาในรูปแบบของ weak measurement แม้ว่าจะไม่มี environment interaction ภายหลังที่เราลดรูป density matrix สำหรับระบบผสมโดยการทำ partial trace แล้ว coherence จะถูกทำลายสำหรับลิมิตที่เวลามีค่ามากๆ
บุญช่วย, สุธี
core