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.
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 -