49 citations · 243 across the 14 of their papers we have counts for
14 papers
The loop-zag resonator: A loop-gap resonator design for improved sensitivity in electron-spin resonance experiments
Brendan C. Sheehan, Guanchu Chen, Sai Chauhan +5
We present a novel design of loop-gap resonator, the loop-zag resonator, for sub-X-band electron-spin resonance spectroscopy. The loop-zag design can achieve improved coupling to s…
Direct Spectroscopic Observation of Berry Phase Interference in the Ni Single-Molecule Magnet
Brendan C. Sheehan, Robert Kwark, Charles A. Collett +3
Berry phase effects in spin systems lead to the suppression of tunneling effects when different tunneling paths interfere destructively. Such effects have been seen in several sing…
Constructing Clock-Transition-Based Two-Qubit Gates from Dimers of Molecular Nanomagnets
Charles A. Collett, Paolo Santini, Stefano Carretta +1
A good qubit must have a coherence time long enough for gate operations to be performed. Avoided level crossings allow for clock transitions in which coherence is enhanced by the i…
A Clock Transition in the CrMn Molecular Nanomagnet
Charles A. Collett, Kai-Isaak Ellers, Nicholas Russo +4
A viable qubit must have a long coherence time . In molecular nanomagnets is often limited at low temperatures by the presence of dipole and hyperfine interactions, whic…
Precision ESR Measurements of Transverse Anisotropy in the Single-molecule Magnet Ni
Charles A. Collett, Rafael A. Allão Cassaro, Jonathan R. Friedman
We present a method for precisely measuring the tunnel splitting in single-molecule magnets using electron-spin resonance, and use these measurements to precisely and independently…
Observation of tunneling-assisted highly forbidden single-photon transitions in a Ni single-molecule magnet
Yiming Chen, Mohammad D. Ashkezari, Charles A. Collett +4
Forbidden transitions between energy levels typically involve violation of selection rules imposed by symmetry and/or conservation laws. A nanomagnet tunneling between up and down…
Anisotropic phases of superfluid 3He in compressed aerogel
J. I. A. Li, A. M. Zimmerman, J. Pollanen +2
It has been shown that the relative stabilities of various superfluid states of 3He can be influenced by anisotropy in a silica aerogel framework. We prepared a suite of aerogel sa…
Stability of superfluid 3He-B in compressed aerogel
J. I. A. Li, A. M. Zimmerman, J. Pollanen +3
In recent work it was shown that new anisotropic p-wave states of superfluid 3He can be stabilized within high porosity silica aerogel under uniform positive strain [1]. In contras…
The Superfluid Glass Phase of 3He-A
J. I. A. Li, J. Pollanen, A. M. Zimmerman +3
It is established theoretically that an ordered state with continuous symmetry is inherently unstable to arbitrarily small amounts of disorder [1, 2]. This principle is of central…
Orientation of the Angular Momentum in Superfluid 3He-A in a Stretched Aerogel
J. I. A. Li, A. M. Zimmerman, J. Pollanen +3
Superfluid 3He-A in a fully characterized stretched aerogel, used in previous work [1], has been studied for parallel and perpendicular orientations of the magnetic field relative…
Zeeman splitting and nonlinear field-dependence in superfluid 3He
C. A. Collett, J. Pollanen, J. I. A. Li +2
We have studied the acoustic Faraday effect in superfluid 3He up to significantly larger magnetic fields than in previous experiments achieving rotations of the polarization of tra…
Nonlinear field-dependence and f-wave interactions in superfluid 3He
C. A. Collett, J. Pollanen, J. I. A. Li +2
We present results of transverse acoustics studies in superfluid ^{3}He-B at fields up to 0.11 T. Using acoustic cavity interferometry, we observe the Acoustic Faraday Effect for a…
New Chiral Phases of Superfluid 3He Stabilized by Anisotropic Silica Aerogel
J. Pollanen, J. I. A. Li, C. A. Collett +3
A rich variety of Fermi systems condense by forming bound pairs, including high temperature [1] and heavy fermion [2] superconductors, Sr2RuO4 [3], cold atomic gases [4], and super…
Identification of Superfluid Phases of 3He in Uniformly Isotropic 98.2% Aerogel
J. Pollanen, J. I. A. Li, C. A. Collett +2
Superfluid 3He confined to high porosity silica aerogel is the paradigm system for understanding impurity effects in unconventional superconductors. However, a crucial first step h…