نتایج جستجو برای: mixed state
تعداد نتایج: 1060928 فیلتر نتایج به سال:
We provide a physical prescription based on interferometry for introducing the total phase of a mixed state undergoing unitary evolution, which has been an elusive concept in the past. We define the parallel transport condition that provides a connection form for obtaining the geometric phase for mixed states. The expression for the geometric phase for mixed state reduces to well known formulas...
We consider a 2D isotropic Fermi liquid with attraction in both s and d channels and examine the possibility of a superconducting state with mixed s and d symmetry of the gap function. We show that both in the weak coupling limit and at strong coupling, a mixed s + id symmetry state is realized in a certain range of interaction. Phase transitions between the mixed and the pure symmetry states a...
چکیده ندارد.
Considering two-level quantum systems, this paper proposes a control strategy that drives an arbitrary pure state to target mixed state via three-step controls. The first step is the preparation of eigenstate: the state of system controlled is driven to eigenstate from an arbitrary pure state. The second one is to drive the eigenstate prepared to the mixed state in which not all of the off-diag...
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