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IQIM Postdoctoral and Graduate Student Seminar

Friday, June 3, 2022
12:00pm to 1:00pm
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East Bridge 114
Towards THz clock rate quantum information processors in lithium niobate nanophotonics
Rajveer Nehra, Postdoctoral Scholar, Marandi Group,

IQIM Seminar followed by lunch

Abstract: Continuous-variable quantum information processing (CVQIP) through quantum photonics stands out among many other architectures due to its unprecedented scalability and room-temperature logical operations. In CVQIP, large-scale entangled quantum states known as cluster states serve as a computation substrate for performing the measurement-based quantum computation. Cluster states are typically generated from single, or two-mode squeezed vacuum states. Significant progress has been made in the generation of optical squeezed vacuum and its utilization for numerous applications. However, it remains challenging to generate, manipulate, and measure such quantum states in nanophotonics with performances required for a wide range of scalable quantum information systems.

In this talk, I will present our approach to overcome these challenges in lithium niobate nanophotonics by utilizing ultrashort-pulse phase-sensitive amplifiers for both generation and all-optical measurement of squeezed states on the same chip. We generate a squeezed state spanning over more than 25 THz of bandwidth supporting only a few optical cycles and measure a maximum of 4.9 dB of squeezing (~11 dB inferred). Our results on generation and measurement of few-optical-cycle squeezed states in nanophotonics enable a practical path towards scalable quantum information systems with THz clock rates.

This work is based on: R. Nehra* and R. Sekine*,..., A. Marandi et al., arXiv:2201.06768

Attendees joining in person must have a valid Caltech UID. Please show your UID at the door [114 E. Bridge].

This seminar will be held in person only.

For more information, please contact Marcia Brown by phone at 626-395-4013 or by email at [email protected].