Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum-speed-limit time for multiqubit open systems   Quantum-speed-limit (QSL) time captures the intrinsic minimal time interval
for a quantum system evolving from an initial state to a target state. In
single qubit open systems, it was found that the memory (non-Markovian) effect
of environment plays an essential role in shortening QSL time or, say,
increasing the capacity for potential speedup. In this paper, we investigate
the QSL time for multiqubit open systems. We find that for a certain class of
states the memory effect still acts as the indispensable requirement for
cutting the QSL time down, while for another class of states this takes place
even when the environment is of no memory. In particular, when the initial
state is in product state |111...1>, there exists a sudden transition from no
capacity for potential speedup to potential speedup in a memoryless
environment. In addition, we also display evidence for the subtle connection
between QSL time and entanglement that weak entanglement may shorten QSL time
even more.

12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
2
The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg