652 citations · 1.7k across the 25 of their papers we have counts for
24 papers · 1 filter
Witnessing and quantifying stellar rank with the Wigner function
Oliver Hahn, Alex Maltesson, Varun Upreti +5
Quantifying non-Gaussianity is essential for assessing the computational power of bosonic quantum systems. We introduce a framework to witness and quantify non-Gaussianity from dis…
Linear-optical test of quantum contextuality with sequential measurements
Jiaqi Liu, Bita Olamaei, Lijian Zhang +2
Quantum contextuality provides a fundamental signature of nonclassical behavior that cannot be explained by noncontextual hidden-variable models. We propose and experimentally impl…
Decoherence time of the ground state spin of centers in hexagonal boron nitride
Fatemeh Tarighi Tabesh, Saleh Rahimi-Keshari, Mehdi Abdi
The ground-state spin of optically active defects in hexagonal boron nitride (hBN) offers a promising platform for quantum information applications, such as qubits for quantum comp…
Measurement incompatibility under loss
Mohammad Mehboudi, Fatemeh Rezaeinia, Saleh Rahimi-Keshari
We investigate the measurement incompatibility of continuous-variable systems with infinite-dimensional Hilbert spaces under the influence of pure losses, a fundamental noise sourc…
Information Scrambling in Bosonic Gaussian Dynamics
Ali Mollabashi, Saleh Rahimi-Keshari
We investigate the dynamics of information scrambling in bosonic systems undergoing Gaussian unitary evolution associated with quadratic Hamiltonians. For initial Gaussian states,…
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…
A Meta Logarithmic-Sobolev Inequality for Phase-Covariant Gaussian Channels
Salman Beigi, Saleh Rahimi-Keshari
We introduce a meta logarithmic-Sobolev (log-Sobolev) inequality for the Lindbladian of all single-mode phase-covariant Gaussian channels of bosonic quantum systems, and prove that…
Quantum Maximal Correlation for Gaussian States
Salman Beigi, Saleh Rahimi-Keshari
We compute the quantum maximal correlation for bipartite Gaussian states of continuous-variable systems. Quantum maximal correlation is a measure of correlation with the monotonici…
Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometry
Safoura S. Mirkhalaf, Mohammad Mehboudi, Zohre Nafari Qaleh +1
We provide new operational significance of nonclassicality in nonequilibrium temperature estimation of bosonic baths with Gaussian probe states and Gaussian dynamics. We find a bou…
Filter functions for the Glauber-Sudarshan -function regularization
Mani Zartab, Ezad Shojaee, Saleh Rahimi-Keshari
The phase-space quasi-probability distribution formalism for representing quantum states provides practical tools for various applications in quantum optics such as identifying the…
Verification of joint measurability using phase-space quasiprobability distributions
Saleh Rahimi-Keshari, Mohammad Mehboudi, Dario De Santis +2
Measurement incompatibility is a distinguishing property of quantum physics and an essential resource for many quantum information processing tasks. We introduce an approach to ver…
In situ characterization of linear-optical networks in randomized boson sampling
Saleh Rahimi-Keshari, Sima Baghbanzadeh, Carlton M. Caves
We introduce a method for efficient, in situ characterization of linear-optical networks (LONs) in randomized boson-sampling (RBS) experiments. We formulate RBS as a distributed ta…
Exact Boson Sampling using Gaussian continuous variable measurements
A. P. Lund, S. Rahimi-Keshari, T. C. Ralph
BosonSampling is a quantum mechanical task involving Fock basis state preparation and detection and evolution using only linear interactions. A classical algorithm for producing sa…
Sufficient Conditions for Efficient Classical Simulation of Quantum Optics
Saleh Rahimi-Keshari, Timothy C. Ralph, Carlton M. Caves
We provide general sufficient conditions for the efficient classical simulation of quantum-optics experiments that involve inputting states to a quantum process and making measurem…
Operational Discord Measure for Gaussian States with Gaussian Measurements
Saleh Rahimi-Keshari, Timothy C. Ralph, Carlton M. Caves
We introduce an operational discord-type measure for quantifying nonclassical correlations in bipartite Gaussian states based on using Gaussian measurements. We refer to this measu…
What can quantum optics say about computational complexity theory?
Saleh Rahimi-Keshari, Austin P. Lund, Timothy C. Ralph
Considering the problem of sampling from the output photon-counting probability distribution of a linear-optical network for input Gaussian states, we obtain results that are of in…
Experimental Verification of Quantum Discord in Continuous-Variable States
S. Hosseini, S. Rahimi-Keshari, J. Y. Haw +6
We introduce a simple and efficient technique to verify quantum discord in unknown Gaussian states and a certain class of non-Gaussian states. We show that any separation in the pe…
Boson Sampling from Gaussian States
A. P. Lund, A. Laing, S. Rahimi-Keshari +3
We pose a generalized Boson Sampling problem. Strong evidence exists that such a problem becomes intractable on a classical computer as a function of the number of Bosons. We descr…
Quantum Process Nonclassicality
Saleh Rahimi-Keshari, Thomas Kiesel, Werner Vogel +3
We propose a definition of nonclassicality for a single-mode quantum-optical process based on its action on coherent states. If a quantum process transforms a coherent state to a n…
Photonic Boson Sampling in a Tunable Circuit
Matthew A. Broome, Alessandro Fedrizzi, Saleh Rahimi-Keshari +4
Quantum computers are unnecessary for exponentially-efficient computation or simulation if the Extended Church-Turing thesis---a foundational tenet of computer science---is correct…
Direct characterization of linear-optical networks
Saleh Rahimi-Keshari, Matthew A. Broome, Robert Fickler +3
We introduce an efficient method for fully characterizing multimode linear-optical networks. Our approach requires only a standard laser source and intensity measurements to direct…
Verification of quantum discord
Saleh Rahimi-Keshari, Carlton M. Caves, Timothy C. Ralph
We introduce a measurement-based method for verifying quantum discord of any bipartite quantum system. We show that by performing an informationally complete POVM (IC-POVM) on one…
Moments of nonclassicality quasiprobabilities
Saleh Rahimi-Keshari, Thomas Kiesel, Werner Vogel
A method is introduced for the verification of nonclassicality in terms of moments of nonclassicality quasiprobability distributions. The latter are easily obtained from experiment…
Quantum process tomography with coherent states
Saleh Rahimi-Keshari, Artur Scherer, Ady Mann +3
We develop an enhanced technique for characterizing quantum optical processes based on probing unknown quantum processes only with coherent states. Our method substantially improve…