116 citations · 502 across the 21 of their papers we have counts for
21 papers
Spin-induced multipartite steady-state entanglement of motional modes in hexagonal boron nitride membranes
Nahid Yazdi, Vahid Salari, Roohollah Ghobadi
In this paper, we focus on a scheme in which three high-quality-factor mechanical modes of a hexagonal boron nitride (hBN) membrane monolayer are coupled to a common optically addr…
Phase-space negativity as a computational resource for quantum kernel methods
Ulysse Chabaud, Roohollah Ghobadi, Salman Beigi +1
Quantum kernel methods are a proposal for achieving quantum computational advantage in machine learning. They are based on a hybrid classical-quantum computation where a function c…
The Power of One Clean Qubit in Supervised Machine Learning
Mahsa Karimi, Ali Javadi-Abhari, Christoph Simon +1
This paper explores the potential benefits of quantum coherence and quantum discord in the non-universal quantum computing model called deterministic quantum computing with one qub…
Photons guided by axons may enable backpropagation-based learning in the brain
Parisa Zarkeshian, Taylor Kergan, Roohollah Ghobadi +2
Despite great advances in explaining synaptic plasticity and neuron function, a complete understanding of the brain's learning algorithms is still missing. Artificial neural networ…
Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics
Jia-Wei Ji, Yu-Feng Wu, Stephen C. Wein +3
We propose a quantum repeater architecture that can operate under ambient conditions. Our proposal builds on recent progress towards non-cryogenic spin-photon interfaces based on n…
Non-Classical Kernels in Continuous Variable Systems
Roohollah Ghobadi
Kernel methods are ubiquitous in classical machine learning, and recently their formal similarity with quantum mechanics has been established. To grasp the potential advantage of q…
Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics
Jia-Wei Ji, Yu-Feng Wu, Stephen C. Wein +3
We propose a quantum repeater architecture that can operate under ambient conditions. Our proposal builds on recent progress towards non-cryogenic spin-photon interfaces based on n…
Analyzing photon-count heralded entanglement generation between solid-state spin qubits by decomposing the master equation dynamics
Stephen C. Wein, Jia-Wei Ji, Yu-Feng Wu +3
We analyze and compare three different schemes that can be used to generate entanglement between spin qubits in optically-active single solid-state quantum systems. Each scheme is…
Optomechanical Detection of Light with Orbital Angular Momentum
Hamidreza Kaviani, Roohollah Ghobadi, Bishnupada Behera +5
We present an optomechanical device designed to allow optical transduction of orbital angular momentum of light. An optically induced twist imparted on the device by light is detec…
The Power of One Qubit in Machine Learning
Roohollah Ghobadi, Jaspreet S. Oberoi, Ehsan Zahedinejhad
Kernel methods are used extensively in classical machine learning, especially in the field of pattern analysis. In this paper, we propose a kernel-based quantum machine learning al…
Towards a Room-Temperature Spin-Photon Interface based on Nitrogen-Vacancy centers and Optomechanics
Roohollah Ghobadi, Stephen Wein, Hamidreza Kaviani +2
The implementation of quantum networks involving quantum memories and photonic channels without the need for cryogenics would be a major technological breakthrough. Nitrogen-vacanc…
Feasibility of efficient room-temperature solid-state sources of indistinguishable single photons using ultrasmall mode volume cavities
Stephen Wein, Nikolai Lauk, Roohollah Ghobadi +1
Highly efficient sources of indistinguishable single photons that can operate at room temperature would be very beneficial for many applications in quantum technology. We show that…
Full-quantum light diode
Filippo Fratini, Roohollah Ghobadi
Unidirectional light transport in one-dimensional nanomaterials at the quantum level is a crucial goal to achieve for upcoming computational devices. We here employ a full-quantum…
Strong micro-macro entanglement from a weak cross-Kerr nonlinearity
Tian Wang, Hon Wai Lau, Hamidreza Kaviani +2
We study the entanglement generated by a weak cross-Kerr nonlinearity between two initial coherent states, one of which has an amplitude close to the single-photon level, while the…
Opto-mechanical micro-macro entanglement
R. Ghobadi, S. Kumar, B. Pepper +3
We propose to create and detect opto-mechanical entanglement by storing one component of an entangled state of light in a mechanical resonator and then retrieving it. Using micro-m…
Can coarse measurements reveal macroscopic quantum effects?
Tian Wang, Roohollah Ghobadi, Sadegh Raeisi +1
It has recently been conjectured that detecting quantum effects such as superposition or entanglement for macroscopic systems always requires high measurement precision. Analyzing…
Creating and detecting micro-macro photon-number entanglement by amplifying and de-amplifying a single-photon entangled state
Roohollah Ghobadi, Alexander Lvovsky, Christoph Simon
We propose a scheme for the observation of micro-macro entanglement in photon number based on amplifying and de-amplifying a single-photon entangled state in combination with homod…
Macroscopic superpositions via nested interferometry: finite temperature and decoherence considerations
Brian Pepper, Evan Jeffrey, Roohollah Ghobadi +2
Recently there has been much interest in optomechanical devices for the production of macroscopic quantum states. Here we focus on a proposed scheme for achieving macroscopic super…
Demonstrating macroscopic entanglement based on Kerr non-linearities requires extreme phase resolution
Roohollah Ghobadi, Sadegh Raeisi, Christoph Simon
Entangled coherent states, which can in principle be created using strong Kerr non-linearities, allow the violation of Bell inequalities for very coarse-grained measurements. This…
Optomechanical superpositions via nested interferometry
Brian Pepper, Roohollah Ghobadi, Evan Jeffrey +2
We present a scheme for achieving macroscopic quantum superpositions in optomechanical systems by using single photon postselection and detecting them with nested interferometers.…
Optomechanical Entanglement in the Presence of Laser Phase Noise
R. Ghobadi, A. R. Bahrampour, C. Simon
We study the simplest optomechanical system in the presence of laser phase noise using the covariance matrix formalism. We show that the destructive effect of the phase noise is es…