Abstract
We introduce a simple optical gate to fuse arbitrary-size polarization entangled W-states to prepare larger W-states. The gate requires a polarizing beam splitter (PBS), a half-wave plate (HWP) and two photon detectors. We study, numerically and analytically, the necessary resource consumption for preparing larger W-states by fusing smaller ones with the proposed fusion gate. We show analytically that resource requirement scales at most sub-exponentially with the increasing size of the state to be prepared. We numerically determine the resource cost for fusion without recycling where W-states of arbitrary size can be optimally prepared. Moreover, we introduce another strategy that is basedon recycling and outperforms the optimal strategy for the non-recycling case.
Original language | English (US) |
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Article number | 103003 |
Journal | New Journal of Physics |
Volume | 13 |
DOIs | |
State | Published - Oct 2011 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)