Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Temporal-Mode Selective Nonlinear Optics for Quantum Information Processing and Interconnects

Temporal modes (TM) are field-orthogonal broadband wave-packet modes. They are a largely untapped degree of freedom for quantum information storage and retrieval in states of light. They form a natural basis for analysis of diverse quantum resources, be they pulsed photon sources or quantum memories with optical read-in/read-out channels. The chief enabling technology for TM manipulation is the Quantum pulse gate (QPG), an ideal device that can "separate" a selected TM component from an input beam with unit efficiency, whilst avoiding crosstalk from orthogonal TMs. Time ordering effects enforce a trade-off condition between these two objectives, ultimately limiting the selectivity of physical QPG implementations. This talk will present a derivation of the selectivity limit for traveling-wave nonlinear interactions, and present two means of overcoming the same: One utilizes cascaded interferometric stages to asymptotically approach unit selectivity, and the other uses nonlinear cavities with dichroism in Q-factors. The second method utilizes a very general theoretical formalism, making it applicable to myriad quantum systems from trapped-ion qubits, to atomic-ensemble broadband memories, to superconducting qubits.

Dileep Reddy

University of Oregon, Department of Physics

Created November 22, 2017, Updated October 1, 2018