期刊
INTERNATIONAL JOURNAL OF QUANTUM INFORMATION
卷 9, 期 7-8, 页码 1745-1755出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0219749911008210
关键词
Entanglement; identical particles; quantum noise
For systems of identical Bosons, it is necessary to reformulate the notions of separability and entanglement in algebraic terms shifting the emphasis from the particle aspect of first quantization to the mode description typical of second quantization. Within this new framework, we show that, unlike for systems consisting of distinguishable qubits, negativity is an exhaustive bipartite entanglement witness for systems with fixed number of Bosons; further, we investigate the impact of dephasing noise in relation to the use of such many-body Bosonic systems in metrological applications.
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