TY - JOUR
T1 - Percolation thresholds for photonic quantum computing
AU - Pant, Mihir
AU - Towsley, Don
AU - Englund, Dirk
AU - Guha, Saikat
N1 - Publisher Copyright:
© 2019, The Author(s).
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Despite linear-optical fusion (Bell measurement) being probabilistic, photonic cluster states for universal quantum computation can be prepared without feed-forward by fusing small n-photon entangled clusters, if the success probability of each fusion attempt is above a threshold, λc(n). We prove a general bound λc(n)≥1∕(n-1), and develop a conceptual method to construct long-range-connected clusters where λc(n) becomes the bond percolation threshold of a logical graph. This mapping lets us find constructions that require lower fusion success probabilities than currently known, and settle a heretofore open question by showing that a universal cluster state can be created by fusing 3-photon clusters over a 2D lattice with a fusion success probability that is achievable with linear optics and single photons, making this attractive for integrated-photonic realizations.
AB - Despite linear-optical fusion (Bell measurement) being probabilistic, photonic cluster states for universal quantum computation can be prepared without feed-forward by fusing small n-photon entangled clusters, if the success probability of each fusion attempt is above a threshold, λc(n). We prove a general bound λc(n)≥1∕(n-1), and develop a conceptual method to construct long-range-connected clusters where λc(n) becomes the bond percolation threshold of a logical graph. This mapping lets us find constructions that require lower fusion success probabilities than currently known, and settle a heretofore open question by showing that a universal cluster state can be created by fusing 3-photon clusters over a 2D lattice with a fusion success probability that is achievable with linear optics and single photons, making this attractive for integrated-photonic realizations.
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U2 - 10.1038/s41467-019-08948-x
DO - 10.1038/s41467-019-08948-x
M3 - Article
C2 - 30842425
AN - SCOPUS:85062585455
SN - 2041-1723
VL - 10
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 1070
ER -