搜索结果: 1-15 共查到“理论物理学 Decoherence”相关记录41条 . 查询时间(0.062 秒)
Spin bath-mediated decoherence in superconductors
Squid tunnel paramagnetic nuclear spin electronic excited state isotope purification
2014/12/22
We consider a SQUID tunneling between 2 nearly degenerate flux states. Decoherence caused by paramagnetic and nuclear spins in the low-T limit is shown to be much stronger than that from electronic ex...
Decoherence and quantum walks: Anomalous diffusion and ballistic tails
Strong coupling density matrix particles lattice
2014/12/20
The common perception is that strong coupling to the environment will always render the evolution of the system density matrix quasiclassical (in fact, diffusive) in the long time limit. We present he...
Interplay between coherence and decoherence in LHCII photosynthetic complex
LHCII photosynthetic complex
2011/9/13
This paper investigates the dynamics of excitonic transport in photocomplex LHCII, the primary component of the photosynthetic apparatus in green plants. The dynamics exhibits a strong interplay betwe...
The talk, based on [1], analyzes the consequences of the assumption that the effects of quantum coherence and the resulting angular ordering in QCD cascades are disrupted within the hot fireball creat...
Designing reservoirs for 1/t decoherence of a qubit
reservoirs decoherence Quantum Physics
2010/11/8
Anomalous decoherence in the Jaynes-Cummings model emerges for a certain class of bosonic reservoirs, described by spectral densities with a band edge frequency coinciding with the qubit transition fr...
Comparison of analytical and numerical methods and the effect of bath coupling on the quantum decoherence
comparison analytical and numerical methods quantum decoherence
2010/11/8
The dynamics of a qubit in a structured environment is investigated theoretically. One point of view of the model is the spin-boson model with a Lorentz shaped spectral density. An alternative view is...
Decoherence in a quantum harmonic oscillator monitored by a Bose-Einstein condensate
Decoherence quantum harmonic oscillator monitored Bose-Einstein condensate
2010/11/9
We investigate the dynamics of a quantum oscillator, whose evolution is monitored by a Bose-Einstein condensate (BEC) trapped in a symmetric double well potential. It is demonstrated that the oscillat...
Coupled-channels density-matrix approach to low-energy nuclear collision dynamics: A technique for quantifying quantum decoherence effects on reaction observables
Coupled-channels density-matrix low-energy nuclear collision dynamics reaction observables
2010/11/11
The coupled-channels density-matrix technique for nuclear reaction dynamics, which is based on the Liouville-von Neumann equation with Lindblad dissipative terms, is developed with the inclusion of fu...
Hybridization and spin decoherence in heavy-hole quantum dots
Hybridization spin decoherence heavy-hole quantum dots
2010/10/27
We theoretically investigate the spin dynamics of a heavy hole con ned to a III-V semiconductor quantum dot interacting with a narrowed nuclear-spin bath. We show that band hybridization leads to an e...
The time evolution of a qubit, consisting of two single-level quantum dots, is studied in the
presence of telegraph noise. The dots are connected by two tunneling paths, with an Aharonov-
Bohm flux ...
Suppressing decoherence and improving entanglement by quantum-jump-based feedback control in two-level systems
Suppressing decoherence improving entanglement by quantum-jump-based feedback two-level systems
2010/10/19
We study the quantum-jump-based feedback control on the entanglement shared between two
qubits with one of them subject to decoherence, while the other qubit is under the control. This situation is v...
A general and solvable random matrix model for spin decoherence
general and solvable random matrix model spin decoherence
2010/10/21
We propose and solve a simple but very general quantum model of an SU(2)spin interacting with a large external system with N states. The coupling is described by a random hamiltonian in a new general ...
Non-equilibrium dynamics of bosonic atoms in optical lattices: Decoherence of many-body states due to spontaneous emission
Non-equilibrium dynamics of bosonic atoms optical lattices Decoherence of many-body states spontaneous emission
2010/10/21
We analyze in detail the heating of bosonic atoms in an optical lattice due to incoherent scattering of light from the lasers forming the lattice. Because atoms scattered into higher bands do not ther...
Decoherence of orbital angular momentum entanglement in a turbulent atmosphere
Infinitesimal propagation equation entangle photons
2010/10/26
The evolution of an entangled photon state propagating through a turbulent atmosphere is formulated in terms of a set of coupled first order differential equations, by using an infinitesimal propagati...
An Alternative to Decoherence by Environment and the Appearance of a Classical World
Decoherence by Environment Appearance Classical World
2010/10/18
We provide an alternative approach to the decoherence-by-environment paradigm in the field of the quantum measurement process and the appearance of a classical world. In contrast to the decoherence ap...