TY - JOUR
T1 - Pulsed generation of quantum coherences and non-classicality in light-matter systems
AU - Gómez-Ruiz, Fernando J.
AU - Acevedo, Oscar L.
AU - Rodríguez, Ferney J.
AU - Quiroga, Luis
AU - Johnson, Neil F.
N1 - Funding Information:
NJ is very grateful to He Wang for stimulating discussions. FG-R, FR, and LQ acknowledge financial support from Facultad de Ciencias through UniAndes-2015 project Quantum control of nonequilibrium hybrid systems-Part II. FG-R and FR acknowledges financial support from Facultad de Ciencias 2018-II. FG-R and FR acknowledges financial support from Fundación para la Promoción de la Investigación y la Tecnología through Banco de la República project 3646. NJ acknowledges partial support from the National Science Foundation (NSF) under grant CNS 1522693 and the Air Force under AFOSR grant FA9550-16-1-0247. The views and conclusions contained herein are solely those of the authors and do not represent official policies or endorsements by any of the entities named in this paper.
Publisher Copyright:
© 2018 Gómez-Ruiz, Acevedo, Rodríguez, Quiroga and Johnson.
PY - 2018/8/17
Y1 - 2018/8/17
N2 - We show that a pulsed stimulus can be used to generate many-body quantum coherences in light-matter systems of general size. Specifically, we calculate the exact time-evolution of an N qubit system coupled to a global boson field, in response to an up-down pulse. The pulse is chosen so that the system dynamically crosses the system's quantum phase transition on both the up and down portion of the cycle. We identify a novel form of dynamically-driven quantum coherence emerging for general N and without having to access the empirically challenging strong-coupling regime. Its properties depend on the speed of the changes in the stimulus. Non-classicalities arise within each subsystem that have eluded previous analyses. Our findings show robustness to losses and noise, and have potential functional implications at the systems level for a variety of nanosystems, including collections of N atoms, molecules, spins, or superconducting qubits in cavities-and possibly even vibration-enhanced light-harvesting processes in macromolecules.
AB - We show that a pulsed stimulus can be used to generate many-body quantum coherences in light-matter systems of general size. Specifically, we calculate the exact time-evolution of an N qubit system coupled to a global boson field, in response to an up-down pulse. The pulse is chosen so that the system dynamically crosses the system's quantum phase transition on both the up and down portion of the cycle. We identify a novel form of dynamically-driven quantum coherence emerging for general N and without having to access the empirically challenging strong-coupling regime. Its properties depend on the speed of the changes in the stimulus. Non-classicalities arise within each subsystem that have eluded previous analyses. Our findings show robustness to losses and noise, and have potential functional implications at the systems level for a variety of nanosystems, including collections of N atoms, molecules, spins, or superconducting qubits in cavities-and possibly even vibration-enhanced light-harvesting processes in macromolecules.
KW - Dicke model
KW - Driven quantum coherences
KW - Electronic-vibrational entanglement
KW - Many-body quantum system
KW - Non-classicalities
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U2 - 10.3389/fphy.2018.00092
DO - 10.3389/fphy.2018.00092
M3 - Article
AN - SCOPUS:85052891795
VL - 6
JO - Frontiers in Physics
JF - Frontiers in Physics
SN - 2296-424X
IS - AUG
M1 - 92
ER -