294 citations · 1.2k across the 15 of their papers we have counts for
15 papers
Effects of charge noise on a pulse-gated singlet-triplet qubit
Zhenyi Qi, X. Wu, D. R. Ward +11
We study the dynamics of a pulse-gated semiconductor double quantum dot qubit. In our experiments, the qubit coherence times are relatively long, but the visibility of the quantum…
Model reduction of cavity nonlinear optics for photonic logic: A quasi-principal components approach
Zhan Shi, Hendra I. Nurdin
Kerr nonlinear cavities displaying optical thresholding have been proposed for the realization of ultra-low power photonic logic gates. In the ultra-low photon number regime, corre…
Formulae for entanglement in a linear coherent feedback network of multiple nondegenerate optical parametric amplifiers: the infinite bandwidth case
Zhan Shi, Hendra I. Nurdin
This paper presents formulae for Einstein-Podolsky-Rosen (EPR) entanglement generated from nondegenerate optical parametric amplifiers (NOPAs) interconnected in a linear cohere…
Local optimality of a coherent feedback scheme for distributed entanglement generation: the idealized infinite bandwidth limit
Zhan Shi, Hendra I. Nurdin
The purpose of this paper is to prove a local optimality property of a recently proposed coherent feedback configuration for distributed generation of EPR entanglement using two no…
Entanglement in a linear coherent feedback chain of nondegenerate optical parametric amplifiers
Zhan Shi, Hendra I. Nurdin
This paper is concerned with linear quantum networks of nondegenerate optical parametric amplifiers (NOPAs), with up to 6, which are interconnected in a coherent feedback c…
Optimization of distributed EPR entanglement generated between two Gaussian fields by the modified steepest descent method
Zhan Shi, Hendra I. Nurdin
Recent theoretical investigations on quantum coherent feedback networks have found that with the same pump power, the Einstein-Podolski-Rosen (EPR)-like entanglement generated via…
Effect of phase shifts on EPR entanglement generated on two propagating Gaussian fields via coherent feedback
Zhan Shi, Hendra I. Nurdin
Recent work has shown that deploying two nondegenerate optical parametric amplifiers (NOPAs) separately at two distant parties in a coherent feedback loop generates stronger Einste…
Two-axis control of a singlet-triplet qubit with an integrated micromagnet
Xian Wu, D. R. Ward, J. R. Prance +9
The qubit is the fundamental building block of a quantum computer. We fabricate a qubit in a silicon double quantum dot with an integrated micromagnet in which the qubit basis stat…
Quantum control and process tomography of a semiconductor quantum dot hybrid qubit
Dohun Kim, Zhan Shi, C. B. Simmons +9
The similarities between gated quantum dots and the transistors in modern microelectronics - in fabrication methods, physical structure, and voltage scales for manipulation - have…
Fast coherent manipulation of three-electron states in a double quantum dot
Zhan Shi, C. B. Simmons, Daniel R. Ward +9
A fundamental goal in the manipulation of quantum systems is the achievement of many coherent oscillations within the characteristic dephasing time T2*[1]. Most manipulations of el…
Coherent Quantum Oscillations in a Silicon Charge Qubit
Zhan Shi, C. B. Simmons, Daniel. R. Ward +10
Fast quantum oscillations of a charge qubit in a double quantum dot fabricated in a Si/SiGe heterostructure are demonstrated and characterized experimentally. The measured inhomoge…
Single-shot measurement of triplet-singlet relaxation in a Si/SiGe double quantum dot
J. R. Prance, Zhan Shi, C. B. Simmons +8
We investigate the lifetime of two-electron spin states in a few-electron Si/SiGe double dot. At the transition between the (1,1) and (0,2) charge occupations, Pauli spin blockade…
A fast "hybrid" silicon double quantum dot qubit
Zhan Shi, C. B. Simmons, J. R. Prance +9
We propose a quantum dot qubit architecture that has an attractive combination of speed and fabrication simplicity. It consists of a double quantum dot with one electron in one dot…
Tunable singlet-triplet splitting in a few-electron Si/SiGe quantum dot
Zhan Shi, C. B. Simmons, J. R. Prance +6
We measure the excited-state spectrum of a Si/SiGe quantum dot as a function of in-plane magnetic field, and we identify the spin of the lowest three eigenstates in an effective tw…
Tunable spin-selective loading of a silicon spin qubit
C. B. Simmons, J. R. Prance, B. J. Van Bael +8
The remarkable properties of silicon have made it the central material for the fabrication of current microelectronic devices. Silicon's fundamental properties also make it an attr…