Publications (46)
Deterministic nano-assembly of a coupled quantum emitter - photonic crystal cavity system
T. van der Sar, J. Hagemeier, W. Pfaff +7
The interaction of a single quantum emitter with its environment is a central theme in quantum optics. When placed in highly confined optical fields, such as those created in optic…
Bootstrap tomography of high-precision pulses for quantum control
V. V. Dobrovitski, G. de Lange, D. Ristè +1
Long-time dynamical decoupling and quantum control of qubits require high-precision control pulses. Full characterization (quantum tomography) of imperfect pulses presents a bootst…
Room-temperature manipulation and decoherence of a single spin in diamond
R. Hanson, O. Gywat, D. D. Awschalom
We report on room-temperature coherent manipulation of the spin of a single nitrogen-vacancy center in diamond and a study of its coherence as a function of magnetic field. We use…
Spins in few-electron quantum dots
R. Hanson, L. P. Kouwenhoven, J. R. Petta +2
This review describes the physics of spins in quantum dots containing one or two electrons, from an experimentalist's viewpoint. Various methods for extracting spin properties from…
Improved Electron-Nuclear Quantum Gates for Spin Sensing and Control
H. B. van Ommen, G. L. van de Stolpe, N. Demetriou +7
The ability to sense and control nuclear spins near solid-state defects might enable a range of quantum technologies. Dynamically Decoupled Radio-Frequency (DDRF) control offers a…
Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
B. Hensen, H. Bernien, A. E. Dréau +16
For more than 80 years, the counterintuitive predictions of quantum theory have stimulated debate about the nature of reality. In his seminal work, John Bell proved that no theory…
Single-shot read-out of an individual electron spin in a quantum dot
J. M. Elzerman, R. Hanson, L. H. Willems van Beveren +3
Spin is a fundamental property of all elementary particles. Classically it can be viewed as a tiny magnetic moment, but a measurement of an electron spin along the direction of an…
Generation and transport of photoexcited electrons in single-crystal diamond
F. J. Heremans, G. D. Fuchs, C. F. Wang +2
We report time-dependent photocurrent and transport measurements of sub-bandgap photoexcited carriers in nitrogen-rich (type Ib), single-crystal diamond. Transient carrier dynamics…
Excited-state spectroscopy on a nearly-closed quantum dot via charge detection
J. M. Elzerman, R. Hanson, L. H. Willems van Beveren +2
We demonstrate a novel method for measuring the discrete energy spectrum of a quantum dot connected very weakly to a single lead. A train of voltage pulses applied to a metal gate…
Single-spin magnetometry with multi-pulse sensing sequences
G. de Lange, D. Ristè, V. V. Dobrovitski +1
We experimentally demonstrate single-spin magnetometry with multi-pulse sensing sequences. The use of multi-pulse sequences can greatly increase the sensing time per measurement sh…
Zeeman energy and spin relaxation in a one-electron quantum dot
R. Hanson, B. Witkamp, L. M. K. Vandersypen +3
We have measured the relaxation time, T1, of the spin of a single electron confined in a semiconductor quantum dot (a proposed quantum bit). In a magnetic field, applied parallel t…
Multipartite entanglement generation and contextuality tests using non-destructive three-qubit parity measurements
Suzanne B. van Dam, Julia Cramer, Tim H. Taminiau +1
We report on the realization and application of non-destructive three-qubit parity measurements on nuclear spin qubits in diamond. We use high-fidelity quantum logic to map the par…
Excited-state spectroscopy using single-spin manipulation in diamond
G. D. Fuchs, V. V. Dobrovitski, R. Hanson +4
We use single-spin resonant spectroscopy to study the spin structure in the orbital excited-state of a diamond nitrogen-vacancy center at room temperature. We find that the excited…
Design and low-temperature characterization of a tunable microcavity for diamond-based quantum networks
S. Bogdanovic, S. B. van Dam, C. Bonato +8
We report on the fabrication and characterization of a Fabry-Perot microcavity enclosing a thin diamond membrane at cryogenic temperatures. The cavity is designed to enhance resona…
Kondo effect out of equilibrium in a mesoscopic device
S. De Franceschi, R. Hanson, W. G. van der Wiel +5
We study the non-equilibrium regime of the Kondo effect in a quantum dot laterally coupled to a narrow wire. We observe a split Kondo resonance when a finite bias voltage is impose…
Decay of Rabi oscillations by dipolar-coupled dynamical spin environments
V. V. Dobrovitski, A. E. Feiguin, R. Hanson +1
We investigate the Rabi oscillations decay of a spin decohered by a spin bath whose internal dynamics is caused by dipolar coupling between the bath spins. The decay form and rate…
Polarization and readout of coupled single spins in diamond
R. Hanson, F. M. Mendoza, R. J. Epstein +1
We study the coupling of a single nitrogen-vacancy center in diamond to a nearby single nitrogen defect at room temperature. The magnetic dipolar coupling leads to a splitting in t…
Orbital and Spin Dynamics of Single Neutrally-Charged Nitrogen-Vacancy Centers in Diamond
S. Baier, C. E. Bradley, T. Middelburg +3
The neutral charge state plays an important role in quantum information and sensing applications based on nitrogen-vacancy centers. However, the orbital and spin dynamics remain un…
Decoherence-protected quantum gates for a hybrid solid-state spin register
T. van der Sar, Z. H. Wang, M. S. Blok +7
Protecting the dynamics of coupled quantum systems from decoherence by the environment is a key challenge for solid-state quantum information processing. An idle qubit can be effic…
Extendable optical phase synchronization of remote and independent quantum network nodes over deployed fibers
A. J. Stolk, J. J. B. Biemond, K. L. van der Enden +3
Entanglement generation between remote qubit systems is the central tasks for quantum communication. Future quantum networks will have to be compatible with low-loss telecom bands…
Universal control and error correction in multi-qubit spin registers in diamond
T. H. Taminiau, J. Cramer, T. van der Sar +2
Quantum registers of nuclear spins coupled to electron spins of individual solid-state defects are a promising platform for quantum information processing. Pioneering experiments s…
Qubit teleportation between non-neighboring nodes in a quantum network
S. L. N. Hermans, M. Pompili, H. K. C. Beukers +3
Future quantum internet applications will derive their power from the ability to share quantum information across the network. Quantum teleportation allows for the reliable transfe…
Robust quantum-network memory based on spin qubits in isotopically engineered diamond
C. E. Bradley, S. W. de Bone, P. F. W. Moller +9
Quantum networks can enable long-range quantum communication and modular quantum computation. A powerful approach is to use multi-qubit network nodes which provide the quantum memo…
Experimental signature of phonon-mediated spin relaxation
T. Meunier, I. T. Vink, L. H. Willems van Beveren +7
We observe an experimental signature of the role of the phonons in spin relaxation between triplet and singlet states in a two-electron quantum dot. Using both the external magneti…
Manipulating a qubit through the backaction of sequential partial measurements and real-time feedback
M. S. Blok, C. Bonato, M. L. Markham +3
Quantum measurements not only extract information from a system but also alter its state. Although the outcome of the measurement is probabilistic, the backaction imparted on the m…
Control and Detection of Singlet-Triplet Mixing in a Random Nuclear Field
F. H. L. Koppens, J. A. Folk, J. M. Elzerman +7
We observe mixing between two-electron singlet and triplet states in a double quantum dot, caused by interactions with nuclear spins in the host semiconductor. This mixing is suppr…
Single-electron charging and detection in a laterally-coupled quantum dot circuit in the few-electron regime
L. -X. Zhang, P. Matagne, J. P. Leburton +2
We provide a physical analysis of the charging and detection of the first few electrons in a laterally-coupled GaAs/AlGaAs quantum dot (LCQD) circuit with integrated quantum point…
Real-time detection of single electron tunneling using a quantum point contact
L. M. K. Vandersypen, J. M. Elzerman, R. N. Schouten +3
We observe individual tunnel events of a single electron between a quantum dot and a reservoir, using a nearby quantum point contact (QPC) as a charge meter. The QPC is capacitivel…
Spin filling of a quantum dot derived from excited-state spectroscopy
L. H. Willems van Beveren, R. Hanson, I. T. Vink +3
We study the spin filling of a semiconductor quantum dot using excited-state spectroscopy in a strong magnetic field. The field is oriented in the plane of the two-dimensional elec…
Probing dynamics of an electron-spin ensemble via a superconducting resonator
V. Ranjan, G. de Lange, R. Schutjens +7
We study spin relaxation and diffusion in an electron-spin ensemble of nitrogen impurities in diamond at low temperature (0.25-1.2 K) and polarizing magnetic field (80-300 mT). Mea…
Universal dynamical decoupling of a single solid-state spin from a spin bath
G. de Lange, Z. H. Wang, D. Ristè +2
Controlling the interaction of a single quantum system with its environment is a fundamental challenge in quantum science and technology. We dramatically suppress the coupling of a…
Single-atom doping for quantum device development in diamond and silicon
C. D. Weis, A. Schuh, A. Batra +10
The ability to inject dopant atoms with high spatial resolution, flexibility in dopant species and high single ion detection fidelity opens opportunities for the study of dopant fl…
Determination of the tunnel rates through a few-electron quantum dot
R. Hanson, I. T. Vink, D. P. DiVincenzo +4
We demonstrate how rate equations can be employed to find analytical expressions for the sequential tunneling current through a quantum dot as a function of the tunnel rates, for a…
Dephasing mechanisms of diamond-based nuclear-spin memories for quantum networks
N. Kalb, P. C. Humphreys, J. J. Slim +1
We probe dephasing mechanisms within a quantum network node consisting of a single nitrogen-vacancy centre electron spin that is hyperfine coupled to surrounding n…
Few-Electron Quantum Dot Circuit with Integrated Charge Read-Out
J. M. Elzerman, R. Hanson, J. S. Greidanus +5
We report on the realization of a few-electron double quantum dot defined in a two-dimensional electron gas by means of surface gates on top of a GaAs/AlGaAs heterostructure. Two q…
Detection and control of individual nuclear spins using a weakly coupled electron spin
T. H. Taminiau, J. J. T. Wagenaar, T. van der Sar +3
We experimentally isolate, characterize and coherently control up to six individual nuclear spins that are weakly coupled to an electron spin in diamond. Our method employs multi-p…
Comparison of dynamical decoupling protocols for a nitrogen-vacancy center in diamond
Zhi-Hui Wang, G. de Lange, D. Riste +2
We perform a detailed theoretical-experimental study of the dynamical decoupling (DD) of the nitrogen-vacancy (NV) center in diamond. We investigate the DD sequences applied to sup…
Controlling the quantum dynamics of a mesoscopic spin bath in diamond
G. de Lange, T. van der Sar, M. S. Blok +3
Understanding and mitigating decoherence is a key challenge for quantum science and technology. The main source of decoherence for solid-state spin systems is the uncontrolled spin…
Single-shot readout of electron spin states in a quantum dot using spin-dependent tunnel rates
R. Hanson, L. H. Willems van Beveren, I. T. Vink +5
We present a method for reading out the spin state of electrons in a quantum dot that is robust against charge noise and can be used even when the electron temperature exceeds the…
Entangling remote qubits using the single-photon protocol: an in-depth theoretical and experimental study
S. L. N. Hermans, M. Pompili, L. Dos Santos Martins +5
The generation of entanglement between remote matter qubits has developed into a key capability for fundamental investigations as well as for emerging quantum technologies. In the…
Loophole-free Bell test using electron spins in diamond: second experiment and additional analysis
B. Hensen, N. Kalb, M. S. Blok +11
The recently reported violation of a Bell inequality using entangled electronic spins in diamonds (Hensen et al., Nature 526, 682-686) provided the first loophole-free evidence aga…
Quantum Computing with Electron Spins in Quantum Dots
L. M. K. Vandersypen, R. Hanson, L. H. Willems van Beveren +4
We present a set of concrete and realistic ideas for the implementation of a small-scale quantum computer using electron spins in lateral GaAs/AlGaAs quantum dots. Initialization i…
Measurement efficiency and n-shot read out of spin qubits
Hans-Andreas Engel, Vitaly Golovach, Daniel Loss +4
We consider electron spin qubits in quantum dots and define a measurement efficiency e to characterize reliable measurements via n-shot read outs. We propose various implementation…
Semiconductor few-electron quantum dot operated as a bipolar spin filter
R. Hanson, L. M. K. Vandersypen, L. H. Willems van Beveren +3
We study the spin states of a few-electron quantum dot defined in a two-dimensional electron gas, by applying a large in-plane magnetic field. We observe the Zeeman splitting of th…
Heralded entanglement between solid-state qubits separated by 3 meters
H. Bernien, B. Hensen, W. Pfaff +8
Quantum entanglement between spatially separated objects is one of the most intriguing phenomena in physics. The outcomes of independent measurements on entangled objects show corr…
Nanopositioning of a diamond nanocrystal containing a single NV defect center
T. van der Sar, E. C. Heeres, G. M. Dmochowski +4
Precise control over the position of a single quantum object is important for many experiments in quantum science and nanotechnology. We report on a technique for high-accuracy pos…