Jonathan Kunjummen
University of Maryland, College Park
PhysicsQuantum decoherencePosition and momentum spaceBaryonDark matterCoupling (physics)Range (particle radiation)Computational physicsAstrophysicsQuantumQuantum sensorDetector
3Publications
2H-index
19Citations
Publications 5
Newest
#1Jonathan Kunjummen (UMD: University of Maryland, College Park)H-Index: 2
#2Minh C. TranH-Index: 12
Last. Jacob M. TaylorH-Index: 60
view all 4 authors...
Quantum process tomography is a critical capability for building quantum computers, enabling quantum networks, and understanding quantum sensors. Like quantum state tomography, the process tomography of an arbitrary quantum channel requires a number of measurements that scale exponentially in the number of quantum bits affected. However, the recent field of shadow tomography, applied to quantum states, has demonstrated the ability to extract key information about a state with only polynomially m...
#1Daniel Carney (NIST: National Institute of Standards and Technology)H-Index: 12
#2Gordan Krnjaic (Fermilab)H-Index: 37
Last. Nicole Crisosto (UW: University of Washington)H-Index: 2
view all 35 authors...
Numerous astrophysical and cosmological observations are best explained by the existence of dark matter, a mass density which interacts only very weakly with visible, baryonic matter. Searching for the extremely weak signals produced by this dark matter strongly motivate the development of new, ultra-sensitive detector technologies. Paradigmatic advances in the control and readout of massive mechanical systems, in both the classical and quantum regimes, have enabled unprecedented levels of sensi...
Source
#1Daniel CarneyH-Index: 12
#2Gordan KrnjaicH-Index: 37
Last. Nicole CrisostoH-Index: 2
view all 35 authors...
Numerous astrophysical and cosmological observations are best explained by the existence of dark matter, a mass density which interacts only very weakly with visible, baryonic matter. Searching for the extremely weak signals produced by this dark matter strongly motivate the development of new, ultra-sensitive detector technologies. Paradigmatic advances in the control and readout of massive mechanical systems, in both the classical and quantum regimes, have enabled unprecedented levels of sensi...
Source
#1Jonathan KunjummenH-Index: 2
#2Daniel CarneyH-Index: 12
Last. Jacob M. TaylorH-Index: 60
view all 3 authors...
#1Manish K. GuptaH-Index: 11
#2Jonathan KunjummenH-Index: 2
Last. Jonathan P. DowlingH-Index: 64
view all 4 authors...
We propose a magnetometer for the precise measurement of AC magnetic fields that uses a Terbium-doped optical fiber with half-waveplates built into it at specified distances. Our scheme uses an open-loop quantum control technique called dynamical decoupling to reduce the noise floor and thus increase the sensitivity. We show that dynamical decoupling is extremely effective in preserving the photon state evolution due to the external AC magnetic field from random birefringence in the fiber, even ...
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