206 citations · 1.1k across the 23 of their papers we have counts for
21 papers
Trapped-ion two-qubit gates with >99.99% fidelity without ground-state cooling
A. C. Hughes, R. Srinivas, C. M. Löschnauer +6
We introduce the 'smooth gate', an entangling method for trapped-ion qubits where residual spin-motion entanglement errors are adiabatically eliminated by ramping the gate detuning…
Subspace Leakage Error Randomized Benchmarking of Mølmer-Sørensen Gates
R. T. Sutherland, A. C. Hughes, J. P. Marceaux +3
We demonstrate a new technique that adapts single-qubit randomized benchmarking to two-qubit Mølmer-Sørensen gates. We use the controllable gate phase to generate Cliffords that ac…
Scalable, high-fidelity all-electronic control of trapped-ion qubits
C. M. Löschnauer, J. Mosca Toba, A. C. Hughes +10
The central challenge of quantum computing is implementing high-fidelity quantum gates at scale. However, many existing approaches to qubit control suffer from a scale-performance…
Breaking the entangling gate speed limit for trapped-ion qubits using a phase-stable standing wave
S. Saner, O. Băzăvan, M. Minder +6
All laser-driven entangling operations for trapped-ion qubits have hitherto been performed without control of the optical phase of the light field, which precludes independent tuni…
Verifiable blind quantum computing with trapped ions and single photons
P. Drmota, D. P. Nadlinger, D. Main +9
We report the first hybrid matter-photon implementation of verifiable blind quantum computing. We use a trapped-ion quantum server and a client-side photonic detection system netwo…
Experimental speedup of quantum dynamics through squeezing
S. C. Burd, H. M. Knaack, R. Srinivas +9
We show experimentally that a broad class of interactions involving quantum harmonic oscillators can be made stronger (amplified) using a unitary squeezing protocol. While our demo…
Coherent Control of Trapped Ion Qubits with Localized Electric Fields
R. Srinivas, C. M. Löschnauer, M. Malinowski +8
We present a new method for coherent control of trapped ion qubits in separate interaction regions of a multi-zone trap by simultaneously applying an electric field and a spin-depe…
Robust Quantum Memory in a Trapped-Ion Quantum Network Node
P. Drmota, D. Main, D. P. Nadlinger +8
We integrate a long-lived memory qubit into a mixed-species trapped-ion quantum network node. Ion-photon entanglement first generated with a network qubit in Sr-88 is transferred t…
Synthesizing a spin-dependent force for optical, metastable, and ground state trapped-ion qubits
O. Băzăvan, S. Saner, M. Minder +5
A single bichromatic field near-resonant to a qubit transition is typically used for or Mølmer-Sørensen type interactions in trapped ion systems. Using this fie…
Individual addressing of trapped ion qubits with geometric phase gates
R. T. Sutherland, R. Srinivas, D. T. C. Allcock
We propose a new scheme for individual addressing of trapped ion qubits, selecting them via their motional frequency. We show that geometric phase gates can perform single-qubit ro…
A quantum network of entangled optical atomic clocks
B. C. Nichol, R. Srinivas, D. P. Nadlinger +5
Optical atomic clocks are our most precise tools to measure time and frequency. They enable precision frequency comparisons between atoms in separate locations to probe the space-t…
Experimental quantum key distribution certified by Bell's theorem
D. P. Nadlinger, P. Drmota, B. C. Nichol +12
Cryptographic key exchange protocols traditionally rely on computational conjectures such as the hardness of prime factorisation to provide security against eavesdropping attacks.…
Micromotion minimisation by synchronous detection of parametrically excited motion
D. P. Nadlinger, P. Drmota, D. Main +6
Precise control of charged particles in radio-frequency (Paul) traps requires minimising excess micromotion induced by stray electric fields. We present a method to detect and comp…
Universal hybrid quantum computing in trapped ions
R. T. Sutherland, R. Srinivas
Using discrete and continuous variable subsystems, hybrid approaches to quantum information could enable more quantum computational power for the same physical resources. Here, we…
High-fidelity laser-free universal control of two trapped ion qubits
R. Srinivas, S. C. Burd, H. M. Knaack +9
Universal control of multiple qubits -- the ability to entangle qubits and to perform arbitrary individual qubit operations -- is a fundamental resource for quantum computation, si…
Quantum amplification of boson-mediated interactions
S. C. Burd, R. Srinivas, H. M. Knaack +7
Strong and precisely-controlled interactions between quantum objects are essential for quantum information processing, simulation, and sensing, and for the formation of exotic quan…
Laser-free trapped-ion entangling gates with simultaneous insensitivity to qubit and motional decoherence
R. T. Sutherland, R. Srinivas, S. C. Burd +7
The dominant error sources for state-of-the-art laser-free trapped-ion entangling gates are decoherence of the qubit state and the ion motion. The effect of these decoherence mecha…
Quantum amplification of mechanical oscillator motion
S. C. Burd, R. Srinivas, J. J. Bollinger +5
Detection of the weakest forces in nature and the search for new physics are aided by increasingly sensitive measurements of the motion of mechanical oscillators. However, the atta…
Trapped-ion spin-motion coupling with microwaves and a near-motional oscillating magnetic field gradient
R. Srinivas, S. C. Burd, R. T. Sutherland +5
We present a new method of spin-motion coupling for trapped ions using microwaves and a magnetic field gradient oscillating close to the ions' motional frequency. We demonstrate an…
Versatile laser-free trapped-ion entangling gates
R. T. Sutherland, R. Srinivas, S. C. Burd +6
We present a general theory for laser-free entangling gates with trapped-ion hyperfine qubits, using either static or oscillating magnetic-field gradients combined with a pair of u…
VECSEL systems for generation and manipulation of trapped magnesium ions
Shaun C. Burd, David T. C. Allcock, Tomi Leinonen +8
Experiments in atomic, molecular, and optical (AMO) physics rely on lasers at many different wavelengths and with varying requirements on spectral linewidth, power, and intensity s…