Quantum walk of light in frequency space and its controlled dephasing

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.042322· OSTI ID:22080361

Pandey, Deepak; Satapathy, Nandan; Meena, M S; Ramachandran, Hema ^[1]

---

1. Raman Research Institute, Sadashivanagar, Bangalore 560080 (India)

We implement, using a coherent source, a coined quantum walk of light in frequency space in a tabletop experiment utilizing a series of modified Michelson interferometers that incorporate polarization optics and acousto-optic modulators. Manipulating the phase of the radio frequency that governs the acousto-optic interaction, we achieve symmetric or asymmetric quantum walks. Introducing rapid random phase shifts electronically, while regulating the amplitude, we cause controlled dephasing and thus simulate a gradual transition from the quantum walk to the classical random walk.

• OSTI ID: 22080361
• Journal Information: Physical Review. A, Vol. 84, Issue 4; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GRAPH THEORY
INTERACTIONS
MICHELSON INTERFEROMETER
OPTICS
PHASE SHIFT
POLARIZATION
RADIOWAVE RADIATION
RANDOMNESS