Improved selection of dark states in the presence of drive-induced dissipation.
ORAL
Abstract
We revisit the coherent population trapping (CPT) of a three-state system in the
presence of environmental fluctuations and strong electromagnetic driving fields. To this end, we
use a fluctuation-regulated quantum master equation that takes into account the drive-induced
dissipation (DID) in the system. DID originates from the combined effect of a driving field and
environmental fluctuations. We report that increasing DID shows a narrowing of CPT linewidth
and hence improved selection of the dark states. As such, the DID enhances the sensitivity of
CPT at a driving strength much larger than the system’s relaxation rates. We also discuss the
practical implementation of the scheme along with possible applications.
presence of environmental fluctuations and strong electromagnetic driving fields. To this end, we
use a fluctuation-regulated quantum master equation that takes into account the drive-induced
dissipation (DID) in the system. DID originates from the combined effect of a driving field and
environmental fluctuations. We report that increasing DID shows a narrowing of CPT linewidth
and hence improved selection of the dark states. As such, the DID enhances the sensitivity of
CPT at a driving strength much larger than the system’s relaxation rates. We also discuss the
practical implementation of the scheme along with possible applications.
* Arpan Chatterjee acknowledges the University Grants Commission (UGC) of the Government of India forproviding financial assistance through senior research fellowship (SRF) with reference ID: 522160.
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Presenters
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Arpan Chatterjee
IISER Kolkata
Authors
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Arpan Chatterjee
IISER Kolkata
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Rangeet Bhattacharyya
IISER KOLKATA, Indian Institute of Science Education and Research Kolkata