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6CCVD Research

Quantum-randomized polarization of laser pulses derived from zero-point diamond motion

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2020-12-22
JournalOptics Express
AuthorsDouglas J. Little, Ondřej Kitzler, Seyed Abedi, Akael Alias, Alexei Gilchrist

Abstract

Section titled ā€œAbstractā€

Intrinsic randomness in quantum systems is a vital resource for cryptography and other quantum information protocols. To date, randomizing macroscopic polarization states requires randomness from an external source, which is then used to modulate the polarization e.g. for quantum key-distribution protocols. Here, we present a Raman-based device for directly generating laser pulses with quantum-randomized polarizations. We show that crystals of diamond lattice symmetry provide a unique operating point for which the Raman gain is isotropic, so that the spontaneous symmetry breaking initiated by the quantum-random zero-point motion determines the output polarization. Experimentally measured polarizations are demonstrated to be consistent with an independent and identical uniform distribution with an estimated quantum entropy rate of 3.8 bits/pulse.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2012 - Random number generation

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