2.5k citations · 72k across the 717 of their papers we have counts for
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Exact wave functions for an electron on a graphene triangular quantum dot
A. V. Rozhkov, Franco Nori
We generalize the known solution of the Schrödinger equation, describing a particle confined to a triangular area, for a triangular graphene quantum dot with armchair-type boundari…
Bell's experiment with intra- and inter-pair entanglement: Single-particle mode entanglement as a case study
S. Ashhab, Koji Maruyama, Caslav Brukner +1
Theoretical considerations of Bell-inequality experiments usually assume identically prepared and independent pairs of particles. Here we consider pairs that exhibit both intra- an…
Quantum emulation of a spin system with topologically protected ground states using superconducting quantum circuits
J. Q. You, Xiao-Feng Shi, Xuedong Hu +1
Using superconducting quantum circuit elements, we propose an approach to experimentally construct a Kitaev lattice, which is an anisotropic spin model on a honeycomb lattice with…
Qubit-oscillator systems in the ultrastrong-coupling regime and their potential for preparing nonclassical states
S. Ashhab, Franco Nori
We consider a system composed of a two-level system (i.e. a qubit) and a harmonic oscillator in the ultrastrong-coupling regime, where the coupling strength is comparable to the qu…
Phase gate of one qubit simultaneously controlling qubits in a cavity
Chui-Ping Yang, Yu-xi Liu, Franco Nori
We propose how to realize a three-step controlled-phase gate of one qubit simultaneously controlling qubits in a cavity or coupled to a resonator. The two-qubit controlled-…
Robust and scalable optical one-way quantum computation
Hefeng Wang, Chui-Ping Yang, Franco Nori
We propose an efficient approach for deterministically generating scalable cluster states with photons. This approach involves unitary transformations performed on atoms coupled to…
Tunable Electromagnetically Induced Transparency and Absorption with Dressed Superconducting Qubits
Hou Ian, Yu-xi Liu, Franco Nori
Electromagnetically induced transparency and absorption (EIT and EIA) are usually demonstrated by three-level atomic or atom-like systems. In contrast to the usual case, we theoret…
Landau-Zener-Stuckelberg interferometry
S. N. Shevchenko, S. Ashhab, Franco Nori
A transition between energy levels at an avoided crossing is known as a Landau-Zener transition. When a two-level system (TLS) is subject to periodic driving with sufficiently larg…
Quantum phase measurement and Gauss sum factorization of large integers in a superconducting circuit
H. T. Ng, Franco Nori
We study the implementation of quantum phase measurement in a superconducting circuit, where two Josephson phase qubits are coupled to the photon field inside a resonator. We show…
Tunable electronic transport and unidirectional quantum wires in graphene subjected to electric and magnetic fields
Yury P. Bliokh, Valentin Freilikher, Franco Nori
Magnetic barriers in graphene are not easily tunable. However, introducing both electric and magnetic fields, provides tunable and far more controllable electronic states in graphe…
Qubit-induced phonon blockade as a signature of quantum behavior in nanomechanical resonators
Yu-xi Liu, Adam Miranowicz, Y. B. Gao +3
The observation of quantized nanomechanical oscillations by detecting femtometer-scale displacements is a significant challenge for experimentalists. We propose that phonon blockad…
Sudden vanishing of spin squeezing under decoherence
Xiaoguang Wang, Adam Miranowicz, Yu-xi Liu +2
In order to witness multipartite correlations beyond pairwise entanglement, spin-squeezing parameters are analytically calculated for a spin ensemble in a collective initial state…
Controlling the transport of single photons by tuning the frequency of either one or two cavities in an array of coupled cavities
Jie-Qiao Liao, Z. R. Gong, Lan Zhou +3
We theoretically study how to control transport, bound states, and resonant states of a single photon in a one-dimensional coupled-cavity array. We find that the transport of a sin…
Detecting Bose-Einstein condensation of exciton-polaritons via electron transport
Yueh-Nan Chen, Neill Lambert, Franco Nori
We examine the Bose-Einstein condensation of exciton-polaritons in a semiconductor microcavity via an electrical current. We propose that by embedding a quantum dot p-i-n junction…
Asymmetric long Josephson junction acting as a ratchet for a quantum field
A. O. Sboychakov, Sergey Savel'ev, A. L. Rakhmanov +1
We study the escape rate of flux quanta in a long Josephson junction having an asymmetric spatial inhomogeneous critical current density. We show that such a junction can behave as…
Diffusion-controlled generation of a proton-motive force across a biomembrane
Anatoly Yu. Smirnov, Sergey E. Savel'ev, Franco Nori
Respiration in bacteria involves a sequence of energetically-coupled electron and proton transfers creating an electrochemical gradient of protons (a proton-motive force) across th…
How the result of a measurement of a component of the spin of a spin-1/2 particle can turn out to be 100 without using weak measurements
S. Ashhab, Franco Nori
We discuss two questions related to the concept of weak values as seen from the standard quantum-mechanics point of view. In the first part of the paper, we describe a scenario whe…
Layered superconductors as negative-refractive-index metamaterials
A. L. Rakhmanov, V. A. Yampol'skii, J. A. Fan +2
We analyze the use of layered superconductors as anisotropic metamaterials. Layered superconductors can have a negative refraction index in a wide frequency range for arbitrary inc…
Phase gate of one superconducting qubit simultaneously controlling n qubits in a cavity
Chui-Ping Yang, Yu-xi Liu, Franco Nori
We propose how to realize a three-step controlled-phase gate of one superconducting qubit simultaneously controlling n qubits selected from N qubits in a cavity (1<n<N). The operat…
Scalable quantum computation via local control of only two qubits
Daniel Burgarth, Koji Maruyama, Michael Murphy +4
We apply quantum control techniques to control a large spin chain by only acting on two qubits at one of its ends, thereby implementing universal quantum computation by a combinati…
The dynamical Casimir effect in a superconducting coplanar waveguide
J. R. Johansson, G. Johansson, C. M. Wilson +1
We investigate the dynamical Casimir effect in a coplanar waveguide (CPW) terminated by a superconducting quantum interference device (SQUID). Changing the magnetic flux through th…
Cooling a magnetic resonance force microscope via the dynamical back-action of nuclear spins
Ya. S. Greenberg, E. Il'ichev, Franco Nori
We analyze the back-action influence of nuclear spins on the motion of the cantilever of a magnetic force resonance microscope. We calculate the contribution of nuclear spins to th…
Measurement-based quantum phase estimation algorithm for finding eigenvalues of non-unitary matrices
Hefeng Wang, Lian-Ao Wu, Yu-xi Liu +1
We propose a quantum algorithm for finding eigenvalues of non-unitary matrices. We show how to construct, through interactions in a quantum system and projective measurements, a no…
Quantum chaos and critical behavior on a chip
Neill Lambert, Yueh-nan Chen, Robert Johannsson +1
The Dicke model describes N qubits (or two-level atoms) homogenously coupled to a bosonic mode. Here we examine an open-system realization of the Dicke model, which contains critic…