J. R. Rozen
IBM
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Featured researches published by J. R. Rozen.
Physical Review B | 2012
Chad Rigetti; Jay M. Gambetta; Stefano Poletto; B.L.T. Plourde; Jerry M. Chow; Antonio Corcoles; John A. Smolin; Seth T. Merkel; J. R. Rozen; George A. Keefe; Mary Beth Rothwell; Mark B. Ketchen; Matthias Steffen
We report a superconducting artificial atom with a coherence time of
Applied Physics Letters | 1993
R. H. Koch; J. R. Rozen; J. Z. Sun; W. J. Gallagher
{T}_{2}^{*}=92
IEEE Transactions on Magnetics | 1989
Mark B. Ketchen; D. D. Awschalom; W. J. Gallagher; A. W. Kleinsasser; Robert L. Sandstrom; J. R. Rozen; B. Bumble
Applied Physics Letters | 1988
D. D. Awschalom; J. R. Rozen; Mark B. Ketchen; W. J. Gallagher; A. W. Kleinsasser; Robert L. Sandstrom; B. Bumble
\ensuremath{\mu}
Applied Physics Letters | 2011
Antonio Corcoles; Jerry M. Chow; Jay M. Gambetta; Chad Rigetti; J. R. Rozen; George A. Keefe; Mary Beth Rothwell; Mark B. Ketchen; Matthias Steffen
s and energy relaxation time
Applied Physics Letters | 2001
R. H. Koch; J. R. Rozen
{T}_{1}=70
Review of Scientific Instruments | 2007
F. P. Milliken; J. R. Rozen; George A. Keefe; R. H. Koch
Applied Physics Letters | 1994
R. H. Koch; V. Foglietti; J. R. Rozen; K.G. Stawiasz; Mark B. Ketchen; Daniel K. Lathrop; J. Z. Sun; W. J. Gallagher
\ensuremath{\mu}
Applied Physics Letters | 1997
S. Kumar; R. Matthews; S. G. Haupt; Daniel K. Lathrop; M. Takigawa; J. R. Rozen; Stephen L. Brown; R. H. Koch
s. The system consists of a single Josephson junction transmon qubit on a sapphire substrate embedded in an otherwise empty copper waveguide cavity whose lowest eigenmode is dispersively coupled to the qubit transition. We attribute the factor of four increase in the coherence quality factor relative to previous reports to device modifications aimed at reducing qubit dephasing from residual cavity photons. This simple device holds promise as a robust and easily produced artificial quantum system whose intrinsic coherence properties are sufficient to allow tests of quantum error correction.
Applied Physics Letters | 1986
J. R. Rozen; D. D. Awschalom
We have invented a three superconducting quantum interference device (SQUID) gradiometer (TSG) that uses three SQUID magnetometers and a novel feedback method to measure magnetic field gradients. One SQUID, designated the reference SQUID, operates normally except that its feedback loop output is directed to all three SQUIDs through identical nonsuperconducting coils around each SQUID. The feedback loops for the remaining two SQUIDs, the sensor SQUIDs, measure the differences between the magnetic field at the reference SQUID location and those at the sensor SQUID locations. The voltage difference between the two sensor SQUID outputs divided by the gradiometer base line, the distance between the sensor SQUIDs, represents the average magnetic field gradient. We have measured gradient sensitivities of 10−12 and 10−10 T/m√Hz for TSGs made from bare low‐Tc and high‐Tc SQUIDs. An advantage of a TSG is that a sensitive gradiometer, free of hysteresis error, can be made using relatively small substrates.
