Featured Publications
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High-sensitivity multichannel zero-to-ultralow field NMR with atomic magnetometer arrays
B. Andrews, et al. PNAS Nexus 4, 6 (2025)
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Enhanced Reactivity at the Oil-Water Interface Accelerates the Synthesis of Zymonic Acid in Microemulsions
B. Wallace, et al. Chem. Sci. (in press) (2025).
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Experimental observation of a time rondeau crystal: Temporal Disorder in Spatiotemporal Order
L. Moon, et al. Nature Physics (in press) (2025)
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Nanoscale engineering and dynamical stabilization of mesoscopic spin textures
K. Harkins, et al. Science Advances 11, 13, eadn9021 (2025)
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Room-temperature quantum sensing with photoexcited triplet electrons in organic crystals
H. Singh, et al. Phys. Rev. Research 7, 013192 (2025)
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Complex 3-dimensional microscale structures for quantum sensing applications
B. Blankenship, et al. Nano. Lett. 23, 9272 (2023)
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High-Field Magnetometry with Hyperpolarized Nuclear Spins
O, Sahin, et al. Nature Comm 13, 5486 (2022)
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Electron induced nanoscale nuclear spin relaxation probed by hyperpolarization injection
W. Beatrez, et al. Phys. Rev. Lett. 131, 010802 (2023)
Our Work Has Been Featured In
33. Imaging Sequences for Hyperpolarized Solids
X. Lv, J. Walton, E. Druga, R. Nazaryan, H. Mao, A. Pines, A. Ajoy, J.A. Reimer [PDF]
Molecules 2021, 26(1), 133
32. High temperature annealing enhanced diamond 13C hyperpolarization at room temperature
M. Gierth, V. Krespach, A. I. Shames, P. Raghavan, E. Druga, N. Nunn, M. Torelli, R. Nirodi, S. Le, R. Zhao, A. Aguilar, X. Lv, M. Shen, C. A. Meriles, J. A. Reimer, A. Zaitsev, A. Pines, O. Shenderova, and A. Ajoy* [PDF]
arXiv:1911.03322 — Advanced Quantum Technologies 2000050 (2020) .
31. Dynamical decoupling in interacting systems: applications to signal-enhanced hyperpolarized readout
A. Ajoy*, R. Nirodi, A. Sarkar, P. Reshetikhin, E. Druga, A. Akkiraju, M. McAllister, G. Maineri, S. Le, A. Lin, A. M. Souza, C. A. Meriles, B. Gilbert, D. Suter, J. A. Reimer, and A. Pines [PDF]
arXiv:2008.08323
30. High-fidelity Trotter formulas for digital quantum simulation
Y.X. Liu, J. Hines, Z. Li, A. Ajoy, and P. Cappellaro [PDF]
arXiv:1807.07664 — Phys. Rev. A (Rapid Comm.), 102, 010601(R), (2020).
29. Optically pumped spin polarization as a probe of many-body thermalization
D. Pagliero, P. R. Zangara, J. Henshaw, A. Ajoy, R. H. Acosta, J. A. Reimer, A. Pines, C. A. Meriles [PDF] [SI]
arXiv:2005.00647 — Science Advances 16, eaaz6986 (2020) .
28. Room temperature “Optical Nanodiamond Hyperpolarizer”: physics, design and operation
A. Ajoy*, R. Nazaryan, E. Druga, K. Liu, A. Aguilar, B. Han, M. Gierth, J. T. Oon, B. Safvati, R. Tsang, J. H. Walton, D. Suter, C. A. Meriles, J. A. Reimer and A. Pines [PDF]
arXiv:1811.10218 — Rev. Sci. Instru. 91, 023106 (2020) .
Youtube video highlighting "Ultracompact Nanodiamond Hyperpolarizer".
27. Hyperpolarized relaxometry based nuclear T1 noise spectroscopy in hybrid diamond quantum register
A. Ajoy*, B. Safvati, R. Nazaryan, J. T. Oon, B. Han, P. Raghavan, R. Nirodi, A. Aguilar, K. Liu, X. Cai, X. Lv, E. Druga, C. Ramanathan, J. A. Reimer, C. A. Meriles, D. Suter, and A. Pines [PDF] [SI]
arXiv:1902.06204 — Nature Communications 10, 5160 (2019) .
26. 13C dynamic nuclear polarization in diamond via a microwave-free ‘integrated’ cross effect
J. Henshaw, D. Pagliero, P.R. Zangara, B. Franzoni, A. Ajoy, R. Acosta, J. Reimer, A. Pines, C. A. Meriles [PDF]
Proc. Natl. Acad. Sci. USA 116, 18334 (2019).
25. Cross-sensor feedback stabilization of an emulated quantum spin gyroscope
J.-C. Jaskula†, K. Saha†, A. Ajoy, D. J. Twitchen, M. Markham, and P. Cappellaro [PDF]
arXiv:1808.04494 — Phys. Rev. Applied 11, 054010 (2019)
24. Dynamic Hamiltonian engineering of 2D rectangular lattices in a one-dimensional ion chain
F. Rajabi, S. Motlakunta, C.-Y. Shih, N. Kotibhaskar, Q. Quraishi, A. Ajoy, and R. Islam [PDF]
arXiv:1808.06124 — npj Quantum Information 5, 32 (2019)
23. Two-electron-spin ratchets as a platform for microwave-free dynamic nuclear polarization of arbitrary material targets
P.R. Zangara, J. Henshaw, D. Pagliero, A. Ajoy, J. Reimer, A. Pines, C. Meriles [PDF]
arXiv:1904.08563 — Nano Letters 19, 2389 (2019)
22. Nanoscale vector DC magnetometry via ancilla assisted frequency up-conversion
Y. X. Liu†, A. Ajoy† and P. Cappellaro [PDF] [SI]
arXiv:1611.04691 — Phys. Rev. Lett. 122, 100501 (2019)
Spotlighted by MIT News
21. Wide dynamic range magnetic field cycler: Harnessing quantum control at low and high fields
YouTube video highlighting "Wide dynamic field cycling".
YouTube video highlighting "Printing coils for NMR".
A. Ajoy*, X. Lv, E. Druga, K. Liu, B. Safvati, A. Morabe, M. Fenton, R. Nazaryan, S. Patel, T. Sjolander, J. Reimer, D Sakellariou, C. Meriles and A. Pines [PDF]
arXiv:1808.06124 — Rev. Sci. Instru. 90, 013112 (2019)
20. Dynamics of frequency-swept nuclear spin optical pumping in powdered diamond at low magnetic fields
P.R. Zangara, S. Dhomkar, A. Ajoy, K. Liu, R. Nazaryan, D. Pagliero, D. Suter, J. Reimer, A. Pines, C. Meriles [PDF] [SI]
Proc. Natl. Acad. Sci., 1811994116, (2019).
19. Selective decoupling and Hamiltonian engineering in dipolar spin networks
A. Ajoy*†, U. Bissbort†, D. Poletti and P. Cappellaro [PDF] [SI]
arXiv:1710.03987 — Phys. Rev. Lett. 122, 013205 (2019)
17. Orientation independent room-temperature optical 13C hyperpolarization in powdered diamond
A. Ajoy*, K. Liu, R. Nazaryan, X. Lv, P. Zangara, B. Safvati, G. Wang, D. Arnold, G. Li, A. Lin, P. Raghavan, E. Druga, S. Dhomkar, D. Pagliero, J. Reimer, D. Suter, C. Meriles and A.Pines [PDF] [SI]
arXiv:1807.07664 — Science Advances 4, eaar5492 (2018).
Spotlighted by Berkeley News, LBNL News, MRS Bulletin, R&D Magazine, Technology Networks, Phys.org, MRC Biomedical Picture of the Day.
16. Multi-spin-assisted optical pumping of bulk 13C nuclear spin polarization in diamond
D. Pagliero, K.R. Koteswara Rao, P.R. Zangara, S. Dhomkar, H.H. Wong, A. Abril, N. Aslam, A. Parker, J. King, C.E. Avalos, A. Ajoy, J. Wrachtrup, A. Pines, C.A. Meriles [PDF]
arXiv:1711.07576 — Phys. Rev. B. 97, 024422 (2018).
Selected as an Editor's Suggestion.
15. A bright nanowire single photon source
L. Marseglia, K. Saha, A. Ajoy, T. Schroder, D. R. Englund, T. Teraji, J. Isoya, F. Jelezko, R. Walsworth, J. L. Pacheco, D. Perry, E. Bielejec and P. Cappellaro [PDF]
Optics Express 26, 80, (2018).
13. Quantum Interpolation for High Resolution Sensing
Blurb here
Spotlighted by MIT NEWS.
A. Ajoy, Y. X. Liu, K. Saha, L. Marseglia, J.-C. Jaskula, U. Bissbort and P. Cappellaro [PDF][SI]
arXiv:1604.01677 -- Proc. Natl. Acad. Sci. 114, 2149 (2017).