
Ryotatsu Yanagimoto
Ph.D. Student in Applied Physics, admitted Autumn 2017
All Publications
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Measurement-free Kerr-based cubic phase gate with Gaussian operations
IEEE. 2020
View details for Web of Science ID 000612090001399
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Engineering a Kerr-Based Deterministic Cubic Phase Gate via Gaussian Operations.
Physical review letters
2020; 124 (24): 240503
Abstract
We propose a deterministic, measurement-free implementation of a cubic phase gate for continuous-variable quantum information processing. In our scheme, the applications of displacement and squeezing operations allow us to engineer the effective evolution of the quantum state propagating through an optical Kerr nonlinearity. Under appropriate conditions, we show that the input state evolves according to a cubic phase Hamiltonian, and we find that the cubic phase gate error decreases inverse quartically with the amount of quadrature squeezing, even in the presence of linear loss. We also show how our scheme can be adapted to deterministically generate a nonclassical approximate cubic phase state with high fidelity using a ratio of native nonlinearity to linear loss of only 10^{-4}, indicating that our approach may be experimentally viable in the near term even on all-optical platforms, e.g., using quantum solitons in pulsed nonlinear nanophotonics.
View details for DOI 10.1103/PhysRevLett.124.240503
View details for PubMedID 32639814
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Adiabatic Fock-state-generation scheme using Kerr nonlinearity
PHYSICAL REVIEW A
2019; 100 (3)
View details for DOI 10.1103/PhysRevA.100.033822
View details for Web of Science ID 000486622300013
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Modeling light shifts in optical lattice clocks
PHYSICAL REVIEW A
2019; 99 (3)
View details for DOI 10.1103/PhysRevA.99.033424
View details for Web of Science ID 000462880700009
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Decomposed description of Ramsey spectra under atomic interactions
PHYSICAL REVIEW A
2018; 98 (1)
View details for DOI 10.1103/PhysRevA.98.012704
View details for Web of Science ID 000437828600006