dc.contributor.author |
Uhrich, P
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|
dc.contributor.author |
Castrignano, S
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|
dc.contributor.author |
Uys, Hermann
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|
dc.contributor.author |
Kastner, M
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dc.date.accessioned |
2017-09-29T06:46:18Z |
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dc.date.available |
2017-09-29T06:46:18Z |
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dc.date.issued |
2017-08 |
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dc.identifier.citation |
Uhrich, P., Castrignano, S., Uys, H. et al. 2017. Noninvasive measurement of dynamic correlation functions. Physical Review A, vol. 96: DOI: 10.1103/PhysRevA.96.022127 |
en_US |
dc.identifier.issn |
1050-2947 |
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dc.identifier.uri |
DOI: 10.1103/PhysRevA.96.022127
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|
dc.identifier.uri |
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.022127
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dc.identifier.uri |
http://hdl.handle.net/10204/9612
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dc.description |
Physical Review A, vol. 96: DOI: 10.1103/PhysRevA.96.022127 |
en_US |
dc.description.abstract |
The measurement of dynamic correlation functions of quantum systems is complicated by measurement backaction. To facilitate such measurements we introduce a protocol, based on weak ancilla-system couplings, that is applicable to arbitrary (pseudo)spin systems and arbitrary equilibrium or nonequilibrium initial states. Different choices of the coupling operator give access to the real and imaginary parts of the dynamic correlation function. This protocol reduces disturbances due to the early-time measurements to a minimum, and we quantify the deviation of the measured correlation functions from the theoretical, unitarily evolved ones. Implementations of the protocol in trapped ions and other experimental platforms are discussed. For spin-1/2 models and single-site observables we prove that measurement backaction can be avoided altogether, allowing for the use of ancilla-free protocols. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
American Physical Society |
en_US |
dc.relation.ispartofseries |
Worklist;19515 |
|
dc.subject |
Noninvasive measurements |
en_US |
dc.subject |
Correlation function |
en_US |
dc.subject |
Quantum simulation |
en_US |
dc.title |
Noninvasive measurement of dynamic correlation functions |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Uhrich, P., Castrignano, S., Uys, H., & Kastner, M. (2017). Noninvasive measurement of dynamic correlation functions. http://hdl.handle.net/10204/9612 |
en_ZA |
dc.identifier.chicagocitation |
Uhrich, P, S Castrignano, Hermann Uys, and M Kastner "Noninvasive measurement of dynamic correlation functions." (2017) http://hdl.handle.net/10204/9612 |
en_ZA |
dc.identifier.vancouvercitation |
Uhrich P, Castrignano S, Uys H, Kastner M. Noninvasive measurement of dynamic correlation functions. 2017; http://hdl.handle.net/10204/9612. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Uhrich, P
AU - Castrignano, S
AU - Uys, Hermann
AU - Kastner, M
AB - The measurement of dynamic correlation functions of quantum systems is complicated by measurement backaction. To facilitate such measurements we introduce a protocol, based on weak ancilla-system couplings, that is applicable to arbitrary (pseudo)spin systems and arbitrary equilibrium or nonequilibrium initial states. Different choices of the coupling operator give access to the real and imaginary parts of the dynamic correlation function. This protocol reduces disturbances due to the early-time measurements to a minimum, and we quantify the deviation of the measured correlation functions from the theoretical, unitarily evolved ones. Implementations of the protocol in trapped ions and other experimental platforms are discussed. For spin-1/2 models and single-site observables we prove that measurement backaction can be avoided altogether, allowing for the use of ancilla-free protocols.
DA - 2017-08
DB - ResearchSpace
DP - CSIR
KW - Noninvasive measurements
KW - Correlation function
KW - Quantum simulation
LK - https://researchspace.csir.co.za
PY - 2017
SM - 1050-2947
T1 - Noninvasive measurement of dynamic correlation functions
TI - Noninvasive measurement of dynamic correlation functions
UR - http://hdl.handle.net/10204/9612
ER -
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en_ZA |