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Search Publications by James(Trey) Porto

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Displaying 1 - 25 of 84

Nanoscale Atomic Density Microscopy

Sarthak Subhankar, Yang Wang, Tsz-Chun Tsui, Steven Rolston, James V. Porto
Quantum simulations with ultracold atoms typically create atomic wavefunctions with structure at optical length scales, where direct imaging suffers from the

Optical lattice with torus topology

Hwanmun Kim, Guanyu Zhu, James V. Porto, Mohammad Hafezi
We propose an experimental scheme to construct an optical lattice where the atoms are confined to the surface of a torus. This construction can be realized with

Photon thermalization via laser cooling of atoms

Chiao-Hsuan Wang, Michael Gullans, James V. Porto, William D. Phillips, Jacob M. Taylor
The cooling of atomic motion by scattered light enables a wide variety of technological and scientific explorations. Here we focus on laser cooling from the

A low-steering piezo-driven mirror

Eric Magnan, James Maslek, Carlos Bracamontes-Palma, Alessandro Restelli, Thomas Boulier, James V. Porto
We present a piezo-driven translatable mirror with excellent pointing stability, capable of driving at frequencies up to tens of kilohertz. Our system uses a

Dark state optical lattice with sub-wavelength spatial structure

Sarthak Subhankar, Tsz-Chun Tsui, James V. Porto, Steve Rolston, Przemek BIenias, Alexey V. Gorshkov, Mateusz Lacki, Michael Baranov, Peter Zoller
We report on the experimental realization of a conservative optical lattice for cold atoms with sub-wavelength spatial structure. The potential is based on the

Spontaneous avalanche dephasing in large Rydberg ensembles

Thomas L. Boulier, Eric Magnan, Carlos Bracamontes, James Maslek, Elizabeth Goldschmidt, Jeremey Young, Alexey V. Gorshkov, Steven Rolston, James V. Porto
Strong dipole-exchange interactions due to spontaneously produced contaminant states can trigger rapid dephasing in many-body Rydberg ensembles [E. Goldschmidt

Anomalous broadening in driven dissipative Rydberg systems

Elizabeth A. Goldschmidt, Thomas L. Boulier, Roger C. Brown, Silvio B. Koller, Jeremy T. Young, Alexey V. Gorshkov, S L. Rolston, James V. Porto
We observe interaction-induced broadening of the two-photon 5s-18s transition in 87Rb atoms trapped in a 3D optical lattice. The measured linewidth increases by

Degenerate Bose-Fermi mixtures of rubidium and ytterbium

James V. Porto, Varun Vaidya, Jiraphat Tiamsuphat, Steven Rolston
We report the first realization of a quantum degenerate mixture of bosonic $^{87}$Rb and fermionic $^{171}$Yb atoms in a hybrid optical dipole trap with a

Magic wavelengths for the 5s-18s transition in rubidium

Elizabeth A. Goldschmidt, Roger C. Brown, James V. Porto, Robert Wyllie, Silvio B. Koller, M S. Safronova, Ulyana I. Safronova, David Norris
Magic wavelengths, for which there is no differential ac Stark shift for the ground and excited state of the atom, allow trapping of excited Rydberg atoms

Pneumatically Actuated and Kinematically Positioned Optics Mounts

Roger C. Brown, Steven Olmschenk, Wu Saijun, Ari Dyckovsky, Robert Wyllie, James V. Porto
We present two complementary designs of pneumatically actuated and kinematically positioned optics mounts: one designed for vertical mounting and translation

Loop Structure Stability of a Double-Well-Lattice BEC

James V. Porto, Hoi-Yin Hui, Ryan Barnett, Sankar Das Sarma
In this work, we consider excited many-body mean-field states of bosons in a double-well optical lattice by investigating stationary Bloch solutions to the non