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DTSTART:20261101T010000
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DESCRIPTION:Time-resolved Quantum Key Distribution using Semiconductor Quantum Dots with Oscillating Photonic States\n\nQuantum dot-based entangled photon sources are promising candidates for quantum key distribution (QKD)\, as they can in principle emit deterministically\, with high brightness and low multiphoton contribution. However\, quantum dots (QD) often inherently possess a fine structure splitting (FSS). Since the entangled photonic state in the presence of non-zero FSS is oscillating\, one must settle for a lower efficiency source through temporal post-selection or a lower measured entanglement fidelity. In both cases\, the overall key rate is reduced. Our QKD analysis shows that this trade-off can be overcome by constructing a time-resolved QKD protocol where all photon pairs emitted by a QD with non-zero FSS can be used in secret key generation. This protocol works only when the detection system's temporal resolution is much smaller than the FSS period. By implementing our protocol\, higher key rates can be achieved as compared to previous QKD experiments with QD entangled photon pair sources.
X-ALT-DESC;FMTTYPE=text/html:<strong>Time-resolved Quantum Key Distribution using Semiconductor Quantum Dots with Oscillating Photonic States</strong><br><br>Quantum dot-based entangled photon sources are promising candidates for quantum key distribution (QKD), as they can in principle emit deterministically, with high brightness and low multiphoton contribution. However, quantum dots (QD) often inherently possess a fine structure splitting (FSS). Since the entangled photonic state in the presence of non-zero FSS is oscillating, one must settle for a lower efficiency source through temporal post-selection or a lower measured entanglement fidelity. In both cases, the overall key rate is reduced. Our QKD analysis shows that this trade-off can be overcome by constructing a time-resolved QKD protocol where all photon pairs emitted by a QD with non-zero FSS can be used in secret key generation. This protocol works only when the detection system's temporal resolution is much smaller than the FSS period. By implementing our protocol, higher key rates can be achieved as compared to previous QKD experiments with QD entangled photon pair sources.
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SUMMARY:IQC Student Seminar Featuring Shlok Nahar
DTSTART;TZID=America/New_York:20230801T120000
DTEND;TZID=America/New_York:20230801T130000
DTSTAMP:20260421T201930Z
TRANSP:OPAQUE
STATUS:CONFIRMED
SEQUENCE:0
LOCATION:QNC 1201
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