Abstract
Quantum mechanics imposes stringent constraints on the amplification of a quantum signal. Deterministic amplification of an unknown quantum state always implies the addition of a minimal amount of noise. Linear and noiseless amplification is allowed in principle provided that it only works probabilistically. Here we present a probabilistic amplifier that combines two quantum state comparison amplifiers (SCAMP) together with a feed-forward state correction strategy. Our system outperforms the unambiguous state discrimination (USD) measure-and-resend based amplifier in terms of the success probability-fidelity product and requires a more complex experimental setting.
| Language | English |
|---|---|
| Title of host publication | Quantum Technologies 2018 |
| Editors | Jürgen Stuhler, Andrew J. Shields, Miles J. Padgett |
| Place of Publication | Bellingham, Washington |
| Number of pages | 10 |
| Volume | 10674 |
| ISBN (Electronic) | 9781510618749 |
| DOIs | |
| Publication status | Published - 21 May 2018 |
| Event | Quantum Technologies 2018 - Strasbourg, France Duration: 23 Apr 2018 → 25 Apr 2018 |
Conference
| Conference | Quantum Technologies 2018 |
|---|---|
| Country | France |
| City | Strasbourg |
| Period | 23/04/18 → 25/04/18 |
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Keywords
- coherent states
- optical amplifier
- probabilistic amplifier
- quantum amplifier
- quantum technologies
- state amplification
- state comparison
Cite this
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Quantum state comparison amplifier with feedforward state correction. / Mazzarella, L.; Donaldson, R. J.; Collins, R. J.; Zanforlin, U.; Tatsi, G.; Buller, G. S.; Jeffers, J.
Quantum Technologies 2018. ed. / Jürgen Stuhler; Andrew J. Shields; Miles J. Padgett. Vol. 10674 Bellingham, Washington, 2018. 106741D.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
TY - GEN
T1 - Quantum state comparison amplifier with feedforward state correction
AU - Mazzarella, L.
AU - Donaldson, R. J.
AU - Collins, R. J.
AU - Zanforlin, U.
AU - Tatsi, G.
AU - Buller, G. S.
AU - Jeffers, J.
PY - 2018/5/21
Y1 - 2018/5/21
N2 - Quantum mechanics imposes stringent constraints on the amplification of a quantum signal. Deterministic amplification of an unknown quantum state always implies the addition of a minimal amount of noise. Linear and noiseless amplification is allowed in principle provided that it only works probabilistically. Here we present a probabilistic amplifier that combines two quantum state comparison amplifiers (SCAMP) together with a feed-forward state correction strategy. Our system outperforms the unambiguous state discrimination (USD) measure-and-resend based amplifier in terms of the success probability-fidelity product and requires a more complex experimental setting.
AB - Quantum mechanics imposes stringent constraints on the amplification of a quantum signal. Deterministic amplification of an unknown quantum state always implies the addition of a minimal amount of noise. Linear and noiseless amplification is allowed in principle provided that it only works probabilistically. Here we present a probabilistic amplifier that combines two quantum state comparison amplifiers (SCAMP) together with a feed-forward state correction strategy. Our system outperforms the unambiguous state discrimination (USD) measure-and-resend based amplifier in terms of the success probability-fidelity product and requires a more complex experimental setting.
KW - coherent states
KW - optical amplifier
KW - probabilistic amplifier
KW - quantum amplifier
KW - quantum technologies
KW - state amplification
KW - state comparison
UR - http://www.scopus.com/inward/record.url?scp=85051187444&partnerID=8YFLogxK
UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10674.toc
UR - https://researchportal.hw.ac.uk/en/publications/quantum-state-comparison-amplifier-with-feedforward-state-correct
U2 - 10.1117/12.2307818
DO - 10.1117/12.2307818
M3 - Conference contribution book
VL - 10674
BT - Quantum Technologies 2018
A2 - Stuhler, Jürgen
A2 - Shields, Andrew J.
A2 - Padgett, Miles J.
CY - Bellingham, Washington
ER -