67 citations · 294 across the 21 of their papers we have counts for
22 papers
Neutral atom entangling gate in the ultrastrong coupling regime
Ebubechukwu O. Ilo-Okeke, Tongzhou Wang, Valentin Ivannikov +1
We propose a method to deterministically entangle qubits or ensembles of qubits interacting with a shared bosonic mode in the ultrastrong coupling regime. We show that the resultin…
Optical and atomic decoherence in entangled atomic ensembles generated by quantum nondemolition measurements
Shuai Gao, Shuang Li, Manish Chaudhary +4
We study the effects of decoherence in the form of optical phase diffusion, photon loss and gain, and atomic dephasing in entangled atomic ensembles produced via quantum nondemolit…
Macroscopic maximally entangled state preparation between two atomic ensembles
Manish Chaudhary, Ebubechukwu O. Ilo-Okeke, Valentin Ivannikov +1
We develop a scheme to prepare a macroscopic maximally entangled state (MMES) between two atomic ensembles using adaptive quantum nondemolition (QND) measurements. The quantum stat…
Measurement operator for quantum nondemolition measurements
Ebubechukwu O. Ilo-Okeke, Ping Chen, Shuang Li +3
We derive a measurement operator corresponding to a quantum nondemolition (QND) measurement of an atomic ensemble. The quantum measurement operator takes the form of a positive ope…
Imaginary time evolution with quantum nondemolition measurements: multi-qubit interactions via measurement nonlinearities
Manikandan Kondappan, Manish Chaudhary, Ebubechukwu O. Ilo-Okeke +2
We show that quantum nondemolition (QND) measurements can be used to realize measurement-based imaginary time evolution. In our proposed scheme, repeated weak QND measurements are…
Hybrid approximation approach to generation of atomic squeezing with quantum nondemolition measurements
Ebubechukwu O. Ilo-Okeke, Manikandan Kondappan, Ping Chen +3
We analyze a scheme that uses quantum nondemolition measurements to induce squeezing of a spinor Bose-Einstein condensate in a double well trap. In a previous paper [Ilo-Okeke et a…
Deterministic preparation of supersinglets with collective spin projections
Ebubechukwu O. Ilo-Okeke, Yangxu Ji, Ping Chen +5
We introduce a procedure to generate supersinglets, the multipartite generalization of angular momentum singlet states. A supersinglet is defined as a total spin zero state consist…
Measurement-based deterministic imaginary time evolution
Yuping Mao, Manish Chaudhary, Manikandan Kondappan +4
We introduce a method to perform imaginary time evolution in a controllable quantum system using measurements and conditional unitary operations. By performing a sequence of weak m…
Stroboscopic quantum nondemolition measurements for enhanced entanglement generation between atomic ensembles
Manish Chaudhary, Yuping Mao, Manikandan Kondappan +3
We develop a measurement operator formalism to handle quantum nondemolition (QND) measurement induced entanglement generation between two atomic gases. We first derive how the QND…
Decoherence effects in quantum nondemolition measurement induced entanglement between Bose-Einstein condensates
Shuai Gao, Ebubechukwu O. Ilo-Okeke, Yuping Mao +4
We study the robustness of quantum nondemolition (QND) measurement-induced entanglement between Bose-Einstein Condensates (BECs). We consider an experimental scheme where two BECs…
Bell correlations in a split two-mode-squeezed Bose-Einstein condensate
Jonas Kitzinger, Xin Meng, Matteo Fadel +4
We propose and analyze a protocol for observing a violation of the Clauser-Horne-Shimony-Holt (CHSH) Bell inequality using two spatially separated Bose-Einstein condensates (BECs).…
Remote state preparation of two-component Bose-Einstein condensates
Manish Chaudhary, Matteo Fadel, Ebubechukwu O. Ilo-Okeke +3
A protocol for remote state preparation is proposed for spin ensembles, where the aim is to prepare a state with a given set of spin expectation values on a remote spin ensemble us…
Two-axis two-spin squeezed states
Jonas Kitzinger, Manish Chaudhary, Manikandan Kondappan +2
The states generated by the two-spin generalization of the two-axis countertwisting Hamiltonian are examined. We analyze the behavior at both short and long timescales, by calculat…
Cooper pair polaritons in cold fermionic atoms within a cavity
Amaury Dodel, Alexander Pikovski, Igor Ermakov +4
We formulate a Bardeen-Cooper-Schriffer (BCS) theory of quasiparticles in a degenerate Fermi gas strongly coupled to photons in a optical cavity. The elementary photonic excitation…
Error suppression in adiabatic quantum computing with qubit ensembles
Naeimeh Mohseni, Marek Narozniak, Alexey N. Pyrkov +3
Incorporating protection against quantum errors into adiabatic quantum computing (AQC) is an important task due to the inevitable presence of decoherence. Here we investigate an er…
Phase diffusion in trapped-atom interferometers
Valentin Ivannikov, Andrei I. Sidorov
We evaluate the performance and phase diffusion of trapped Rb atoms in an atom-chip sensor with Ramsey interferometry and Hahn's spin echo in the time and phase domains. We…
Split spin-squeezed Bose-Einstein Condensates
Yumang Jing, Matteo Fadel, Valentin Ivannikov +1
We investigate and model the behaviour of split spin-squeezed Bose-Einstein condensates (BECs) system. In such a system, a spin-polarized BEC is first squeezed using a …
Adiabatic entangling gate of Bose-Einstein condensates based on the minimum function
Sergi Ortiz, Yilun Song, June Wu +2
A scheme is presented to perform an entangling gate between two atomic ensembles or Bose-Einstein condensates in a optical cavity with a common optical mode. The method involves us…
Ultracold atom interferometry with pulses of variable duration
Valentin Ivannikov
We offer interferometry models for thermal ensembles with one-body losses and the phenomenological inclusion of perturbations covering most of the thermal atom experiments. A possi…
Ensemble master equation for a trapped-atom clock with one- and two-body losses
Valentin Ivannikov
An ensemble density matrix model that includes one- and two-body losses is derived for a trapped-atom clock. A trapped-atom clock is mainly affected by one- and two-body losses, ge…
Doppler-free two-photon resonances for atom detection and sum frequency stabilization
A. M. Akulshin, B. V. Hall, V. Ivannikov +2
We investigate the excitation of the 5D_{5/2} level in Rb atoms using counter-propagating laser beams, which are nearly resonant to the one-photon 5S_{1/2} - 5P_{3/2} and 5P_{3/2}…
Long-lived periodic revivals of coherence in an interacting Bose-Einstein condensate
Mikhail Egorov, Russell P. Anderson, Valentin Ivannikov +4
We observe the coherence of an interacting two-component Bose-Einstein condensate (BEC) surviving for seconds in a trapped Ramsey interferometer. Mean-field driven collective oscil…