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Ekstrand, Michael D. (author), Beattie, Lex (author), Pera, M.S. (author), Cramer, Henriette (author)Information Retrieval (IR) systems have a wide range of impacts on consumers. We offer maps to help identify goals IR systems could—or should—strive for, and guide the process of scoping how to gauge a wide range of consumer-side impacts and the possible interventions needed to address these effects. Grounded in prior work on scoping...conference paper 2024
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van Dam, S.B. (author), Cramer, J. (author), Taminiau, T.H. (author), Hanson, R. (author)We report on the realization and application of nondestructive three-qubit parity measurements on nuclear spin qubits in diamond. We use high-fidelity quantum logic to map the parity of the joint state of three nuclear spin qubits onto an electronic spin qubit that acts as an ancilla, followed by a single-shot nondestructive readout of the...journal article 2019
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Abobeih, M.H.M.A. (author), Cramer, J. (author), Bakker, M.V. (author), Kalb, N. (author), Markham, M. (author), Twitchen, D. J. (author), Taminiau, T.H. (author)Single electron spins coupled to multiple nuclear spins provide promising multi-qubit registers for quantum sensing and quantum networks. The obtainable level of control is determined by how well the electron spin can be selectively coupled to, and decoupled from, the surrounding nuclear spins. Here we realize a coherence time exceeding a...journal article 2018
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Cramer, Sophie J.E. (author), Dekker, Janneke (author), Dankelman, J. (author), Pauws, Steffen C. (author), Hooper, Stuart B. (author), te Pas, Arjan B. (author)Apnea of prematurity (AOP) is one of the most common diagnoses in preterm infants. Severe and recurrent apneas are associated with cerebral injury and adverse neurodevelopmental outcome. Despite pharmacotherapy and respiratory support to prevent apneas, a proportion of infants continue to have apneas and often need tactile stimulation, mask,...review 2018
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Ciavatti, A. (author), Cramer, T. (author), Carroli, M. (author), Basiricò, L. (author), Fuhrer, R. (author), de Leeuw, D.M. (author), Fraboni, B. (author)Semiconducting polymer based X-ray detectors doped with high-Z nanoparticles hold the promise to combine mechanical flexibility and large-area processing with a high X-ray stopping power and sensitivity. Currently, a lack of understanding of how nanoparticle doping impacts the detector dynamics impedes the optimization of such detectors. Here...journal article 2017
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Cramer, J. (author)Digital information based on the laws of quantum mechanics promisses powerful new ways of computation and communication. However, quantum information is very fragile; inevitable errors continuously build up and eventually all information is lost. Therefore, realistic large-scale quantum information processing requires the protection of quantum...doctoral thesis 2016
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Kalb, N. (author), Cramer, J. (author), Twitchen, D. J. (author), Markham, M. (author), Hanson, R. (author), Taminiau, T.H. (author)Repeated observations inhibit the coherent evolution of quantum states through the quantum Zeno effect. In multi-qubit systems this effect provides opportunities to control complex quantum states. Here, we experimentally demonstrate that repeatedly projecting joint observables of multiple spins creates quantum Zeno subspaces and...journal article 2016
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Cramer, J. (author), Kalb, N. (author), Rol, M.A. (author), Hensen, B.J. (author), Blok, M.S. (author), Markham, M. (author), Twitchen, D. J. (author), Hanson, R. (author), Taminiau, T.H. (author)Reliable quantum information processing in the face of errors is a major fundamental and technological challenge. Quantum error correction protects quantum states by encoding a logical quantum bit (qubit) in multiple physical qubits. To be compatible with universal fault-tolerant computations, it is essential that states remain encoded at all...journal article 2016
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Saira, O.P. (author), Groen, J.P. (author), Cramer, J. (author), Meretska, M. (author), De Lange, G. (author), DiCarlo, L. (author)We present an indirect two-qubit parity meter in planar circuit quantum electrodynamics, realized by discrete interaction with an ancilla and a subsequent projective ancilla measurement with a dedicated, dispersively coupled resonator. Quantum process tomography and successful entanglement by measurement demonstrate that the meter is...journal article 2014
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Groen, J.P. (author), Riste, D. (author), Tornberg, L. (author), Cramer, J. (author), De Groot, P.C. (author), Picot, T. (author), Johansson, G. (author), DiCarlo, L. (author)We realize indirect partial measurement of a transmon qubit in circuit quantum electrodynamics by interaction with an ancilla qubit and projective ancilla measurement with a dedicated readout resonator. Accurate control of the interaction and ancilla measurement basis allows tailoring the measurement strength and operator. The tradeoff between...journal article 2013
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- Cramer, Heike (author) conference paper 2002
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- Cramer, Heike (author) conference paper 2001
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- Cramer, D.O. (author) master thesis 1998
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- Cramer, Heike (author) journal article 1998
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- Cramer, D.O. (author) other 1998
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- Cramer, Espen H. (author), Loseth, Robert (author), Olaisen, Kjell (author), Valsgard, Sverre (author) report 1995
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- Cramer, E.H. (author), Bea, R.G. (author) report 1995
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- Cramer, H.P. (author) master thesis 1988