Heralded Quantum Gates with Integrated Error Detection in Optical Cavities

Johannes Borregaard; P. Kómár; P. Kessler; Anders Søndberg Sørensen; M.D. Lukin

doi:10.1103/PhysRevLett.114.110502

Heralded Quantum Gates with Integrated Error Detection in Optical Cavities

Johannes Borregaard, P. Kómár, P. Kessler, Anders Søndberg Sørensen, M.D. Lukin

Quantop

31 Citations (Scopus)

492 Downloads (Pure)

Abstract

We propose and analyze heralded quantum gates between qubits in optical cavities. They employ an auxiliary qubit to report if a successful gate occurred. In this manner, the errors, which would have corrupted a deterministic gate, are converted into a nonunity probability of success: once successful, the gate has a much higher fidelity than a similar deterministic gate. Specifically, we describe that a heralded, near-deterministic controlled phase gate (CZ gate) with the conditional error arbitrarily close to zero and the success probability that approaches unity as the cooperativity of the system, C, becomes large. Furthermore, we describe an extension to near-deterministic N-qubit Toffoli gate with a favorable error scaling. These gates can be directly employed in quantum repeater networks to facilitate near-ideal entanglement swapping, thus greatly speeding up the entanglement distribution.

Original language	English
Article number	110502
Journal	Physical Review Letters
Volume	114
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.114.110502
Publication status	Published - 17 Mar 2015

Access to Document

10.1103/PhysRevLett.114.110502Licence: CC BY-NC-ND

PhysRevLett.114.110502Final published version, 271 KBLicence: CC BY-NC-ND

Cite this

@article{3540cff1fb4f422583de626ab75f1dec,

title = "Heralded Quantum Gates with Integrated Error Detection in Optical Cavities",

abstract = "We propose and analyze heralded quantum gates between qubits in optical cavities. They employ an auxiliary qubit to report if a successful gate occurred. In this manner, the errors, which would have corrupted a deterministic gate, are converted into a nonunity probability of success: once successful, the gate has a much higher fidelity than a similar deterministic gate. Specifically, we describe that a heralded, near-deterministic controlled phase gate (CZ gate) with the conditional error arbitrarily close to zero and the success probability that approaches unity as the cooperativity of the system, C, becomes large. Furthermore, we describe an extension to near-deterministic N-qubit Toffoli gate with a favorable error scaling. These gates can be directly employed in quantum repeater networks to facilitate near-ideal entanglement swapping, thus greatly speeding up the entanglement distribution.",

author = "Johannes Borregaard and P. K{\'o}m{\'a}r and P. Kessler and S{\o}rensen, {Anders S{\o}ndberg} and M.D. Lukin",

year = "2015",

month = mar,

day = "17",

doi = "10.1103/PhysRevLett.114.110502",

language = "English",

volume = "114",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

}

TY - JOUR

T1 - Heralded Quantum Gates with Integrated Error Detection in Optical Cavities

AU - Borregaard, Johannes

AU - Kómár, P.

AU - Kessler, P.

AU - Sørensen, Anders Søndberg

AU - Lukin, M.D.

PY - 2015/3/17

Y1 - 2015/3/17

N2 - We propose and analyze heralded quantum gates between qubits in optical cavities. They employ an auxiliary qubit to report if a successful gate occurred. In this manner, the errors, which would have corrupted a deterministic gate, are converted into a nonunity probability of success: once successful, the gate has a much higher fidelity than a similar deterministic gate. Specifically, we describe that a heralded, near-deterministic controlled phase gate (CZ gate) with the conditional error arbitrarily close to zero and the success probability that approaches unity as the cooperativity of the system, C, becomes large. Furthermore, we describe an extension to near-deterministic N-qubit Toffoli gate with a favorable error scaling. These gates can be directly employed in quantum repeater networks to facilitate near-ideal entanglement swapping, thus greatly speeding up the entanglement distribution.

AB - We propose and analyze heralded quantum gates between qubits in optical cavities. They employ an auxiliary qubit to report if a successful gate occurred. In this manner, the errors, which would have corrupted a deterministic gate, are converted into a nonunity probability of success: once successful, the gate has a much higher fidelity than a similar deterministic gate. Specifically, we describe that a heralded, near-deterministic controlled phase gate (CZ gate) with the conditional error arbitrarily close to zero and the success probability that approaches unity as the cooperativity of the system, C, becomes large. Furthermore, we describe an extension to near-deterministic N-qubit Toffoli gate with a favorable error scaling. These gates can be directly employed in quantum repeater networks to facilitate near-ideal entanglement swapping, thus greatly speeding up the entanglement distribution.

U2 - 10.1103/PhysRevLett.114.110502

DO - 10.1103/PhysRevLett.114.110502

M3 - Journal article

C2 - 25839248

SN - 0031-9007

VL - 114

JO - Physical Review Letters

JF - Physical Review Letters

M1 - 110502

ER -

Heralded Quantum Gates with Integrated Error Detection in Optical Cavities

Abstract

Access to Document

Fingerprint

Cite this