Surpassing millisecond coherence in on chip superconducting quantum memories by optimizing materials and circuit design

Autor: Suhas Ganjam, Yanhao Wang, Yao Lu, Archan Banerjee, Chan U Lei, Lev Krayzman, Kim Kisslinger, Chenyu Zhou, Ruoshui Li, Yichen Jia, Mingzhao Liu, Luigi Frunzio, Robert J. Schoelkopf

Publikováno v: Nature Communications, Vol 15, Iss 1, Pp 1-13 (2024)

Abstract The performance of superconducting quantum circuits for quantum computing has advanced tremendously in recent decades; however, a comprehensive understanding of relaxation mechanisms does not yet exist. In this work, we utilize a multimode a

Externí odkaz: https://doaj.org/article/93793a58083c479c8ab33598885d7757

Precision measurement of the microwave dielectric loss of sapphire in the quantum regime with parts-per-billion sensitivity

Autor: Alexander P. Read, Benjamin J. Chapman, Chan U Lei, Jacob C. Curtis, Suhas Ganjam, Lev Krayzman, Luigi Frunzio, Robert J. Schoelkopf

Dielectric loss is known to limit state-of-the-art superconducting qubit lifetimes. Recent experiments imply upper bounds on bulk dielectric loss tangents on the order of $100$ parts-per-billion, but because these inferences are drawn from fully fabr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::940592f8100f6db7ea732f0d67f69f0a

A quantum photonic dissipative transport theory

Autor: Chan U Lei, Wei-Min Zhang

Publikováno v: Annals of Physics. 327:1408-1433

In this paper, a quantum transport theory for describing photonic dissipative transport dynamics in nanophotonics is developed. The nanophotonic devices concerned in this paper consist of on-chip all-optical integrated circuits incorporating photonic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::456674a232a3a5428701575c6a6dd748
https://doi.org/10.1016/j.aop.2012.02.005

Strong opto-electro-mechanical coupling in a silicon photonic crystal cavity

Autor: Oskar Painter, Alessandro Tredicucci, Jeff T. Hill, Alessandro Pitanti, Johannes M. Fink, Chan U Lei, Amir H. Safavi-Naeini

Publikováno v: Optics express 23 (2015): 3196–3208. doi:10.1364/OE.23.003196
info:cnr-pdr/source/autori:Pitanti A.; Fink J.M.; Safavi-Naeini A.H.; Hill J. T.; Lei C.U.; Tredicucci A.; Painter O./titolo:Strong opto-electro-mechanical coupling in a silicon photonic crystal cavityo/doi:10.1364%2FOE.23.003196/rivista:Optics express/anno:2015/pagina_da:3196/pagina_a:3208/intervallo_pagine:3196–3208/volume:23

We fabricate and characterize a microscale silicon opto-electro-mechanical system whose mechanical motion is coupled capacitively to an electrical circuit and optically via radiation pressure to a photonic crystal cavity. To achieve large electromech

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79c37ab23a8c8d430d868c927f8d9cef
https://resolver.caltech.edu/CaltechAUTHORS:20150320-083611819

Mechanically Detecting and Avoiding the Quantum Fluctuations of a Microwave Field

Autor: Keith Schwab, A. J. Weinstein, Junho Suh, Chan U Lei, Steven Steinke, Pierre Meystre, Emma E. Wollman, Aashish A. Clerk

During the theoretical investigation of the ultimate sensitivity of gravitational wave detectors through the 1970's and '80's, it was debated whether quantum fluctuations of the light field used for detection, also known as photon shot noise, would u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::75e10faeec516c20827e96d2640017cd
http://arxiv.org/abs/1312.4084