Dr Eran Ginossar

Senior Lecturer

Email:
Phone: Work: 01483 68 2714
Room no: 20 ATI 02

Office hours

Please e-mail me to schedule a meeting or regarding applications for PhD (also see projects page )

Further information

Biography

Eran Ginossar is a Lecturer at the Department of Physics and Advanced Technology Institute at the University of Surrey. He received his PhD in 2008 from the Weizmann Institute of Science in Israel on researching Quantum optical effects in semiconductors. He moved to Yale University to study the physics of superconducting circuits, a field that is rapidly progressing in creating viable devices for quantum information processing at the intersection between quantum optics and solid state. Additional topics of interest include interaction effects in mesoscopic systems, quantum optics and quantum simulations. Eran has joined the university of Surrey in 2011. He is a member of the IoP, APS and held an EPSRC fellowship until Sept. 2014.

Research Interests

Circuit Quantum Electrodynamics, Quantum optics and Quantum information processing: Measurement theory and control of Qubits and Resonators. These projects are geared towards developing the building blocks and protocols for quantum information processing with solid state devices. My research in this field is strongly motivated by experiments which routinely raise research questions in quantum optics and coherent control. The methodology involves taking a non-equilibrium open system approach to modeling and employing large scale computer simulations.

Mesoscopic physics and topological states: Electronic interferometers in the quantum Hall state, persistent currents in normal metal rings, Majorana fermions.

Publications

Highlights

  • Elliott M, Ginossar E. (2015) 'Enhancement and state tomography of a squeezed vacuum with circuit quantum electrodynamics'. PHYSICAL REVIEW A, 92 (1) Article number ARTN 013826
  • Yavilberg K, Ginossar E, Grosfeld E. (2014) 'Fermion parity measurement and control in Majorana circuit quantum electrodynamics'. PHYSICAL REVIEW B, 92 (7) Article number ARTN 075143
  • Ginossar E, Grosfeld E. (2014) 'Microwave transitions as a signature of coherent parity mixing effects in the Majorana-transmon qubit'. NATURE COMMUNICATIONS, 5 Article number ARTN 4772
  • Bishop LS, Ginossar E, Girvin SM. (2010) 'Response of the Strongly Driven Jaynes-Cummings Oscillator'. PHYSICAL REVIEW LETTERS, 105 (10) Article number ARTN 100505
  • Bleszynski-Jayich AC, Shanks WE, Peaudecerf B, Ginossar E, von Oppen F, Glazman L, Harris JGE. (2009) 'Persistent Currents in Normal Metal Rings'. SCIENCE, 326 (5950), pp. 272-275.
  • Neder I, Ginossar E. (2008) 'Behavior of electronic interferometers in the nonlinear regime'. PHYSICAL REVIEW LETTERS, 100 (19) Article number ARTN 196806

Journal articles

  • Ginossar E, Joo J. (2016) 'Efficient scheme for hybrid teleportation via entangled coherent states in circuit quantum electrodynamics'. Scientific Reports, 6

    Abstract

    We propose a deterministic scheme for teleporting an unknown qubit state through continuous-variable entangled states in superconducting circuits. The qubit is a superconducting two-level system and the bipartite quantum channel is a microwave photonic entangled coherent state between two cavities. A Bell-type measurement performed on the hybrid state of solid and photonic states transfers a discrete-variable unknown electronic state to a continuous-variable photonic cat state in a cavity mode. In order to facilitate the implementation of such complex protocols we propose a design for reducing the self-Kerr nonlinearity in the cavity. The teleporation scheme enables quantum information processing operations with circuit-QED based on entangled coherent states. These include state veriļ¬cation and single-qubit operations with entangled coherent states. These are shown to be experimentally feasible with the state of the art superconducting circuits.

  • Callison A, Grosfeld E, Ginossar E. (2016) 'Protected ground states in short chains of coupled spins in circuit quantum electrodynamics'.

    Abstract

    The quasi-degenerate ground state manifold of the anisotropic Ising spin model can encode quantum information, but its degree of protection against local perturbations is known to be only partial. We explain how the coupling between the two ground states can be used to observe signatures of Majorana zero modes in a small controlled chain of qubits. We argue that the protection against certain local perturbations persists across a range of parameters even away from the ideal point. Remarkably, when additional non-local interactions are considered the system enters a phase where the ground states are fully protected against all local field perturbations.

  • Joo J, Ginossar E. (2015) 'Hybrid teleportation via entangled coherent states in circuit quantum electrodynamics'.

    Abstract

    We propose a deterministic scheme for teleporting an unknown qubit through continuous-variable entangled states in superconducting circuits. The qubit is a superconducting two-level system and the bipartite quantum channel is a photonic entangled coherent state between two cavities. A Bell-type measurement performed on the hybrid state of solid and photonic states brings a discrete-variable unknown electronic state to a continuous-variable photonic cat state in a cavity mode. This scheme further enables applications for quantum information processing in the same architecture of circuit-QED such as verification and error-detection schemes for entangled coherent states. Finally, a dynamical method of a self-Kerr tunability in a cavity state has been investigated for minimizing self-Kerr distortion and all essential ingredients are shown to be experimentally feasible with the state of the art superconducting circuits.

  • Joo J, Elliott M, Oi DKL, Ginossar E, Spiller TP. (2015) 'Deterministic amplification of Schroedinger cat states in circuit quantum electrodynamics'. New Journal of Physics, 18, pp. 023028-023028.

    Abstract

    We propose a dynamical scheme for deterministically amplifying photonic Schroedinger cat states based on a set of optimal state-transfers. The scheme can be implemented in strongly coupled qubit-cavity systems and is well suited to the capabilities of state of the art superconducting circuits. The ideal analytical scheme is compared with a full simulation of the open Jaynes-Cummings model with realistic device parameters. This amplification tool can be utilized for practical quantum information processing in non-classical continuous-variable states.

  • Elliott M, Ginossar E. (2015) 'Enhancement and state tomography of a squeezed vacuum with circuit quantum electrodynamics'. PHYSICAL REVIEW A, 92 (1) Article number ARTN 013826
  • Yavilberg K, Ginossar E, Grosfeld E. (2014) 'Fermion parity measurement and control in Majorana circuit quantum electrodynamics'. PHYSICAL REVIEW B, 92 (7) Article number ARTN 075143
  • Ginossar E, Grosfeld E. (2014) 'Microwave transitions as a signature of coherent parity mixing effects in the Majorana-transmon qubit'. NATURE COMMUNICATIONS, 5 Article number ARTN 4772
  • Murch KW, Weber SJ, Beck KM, Ginossar E, Siddiqi I. (2013) 'Reduction of the radiative decay of atomic coherence in squeezed vacuum'. NATURE, 499 (7456), pp. 62-65.
  • Kirchmair G, Vlastakis B, Leghtas Z, Nigg SE, Paik H, Ginossar E, Mirrahimi M, Frupzio L, Girvin SM, Schoelkopf RJ. (2012) 'Observation of quantum state collapse and revival due to the single-photon Kerr effect'. NATURE, 495 (7440), pp. 205-209.
  • Murch KW, Ginossar E, Weber SJ, Vijay R, Girvin SM, Siddiqi I. (2012) 'Quantum state sensitivity of an autoresonant superconducting circuit'. PHYSICAL REVIEW B, 86 (22) Article number ARTN 220503
  • Schuster DI, Sears AP, Ginossar E, DiCarlo L, Frunzio L, Morton JJL, Wu H, Briggs GAD, Buckley BB, Awschalom DD, Schoelkopf RJ. (2010) 'High-Cooperativity Coupling of Electron-Spin Ensembles to Superconducting Cavities'. PHYSICAL REVIEW LETTERS, 105 (14) Article number ARTN 140501
  • Johnson BR, Reed MD, Houck AA, Schuster DI, Bishop LS, Ginossar E, Gambetta JM, DiCarlo L, Frunzio L, Girvin SM, Schoelkopf RJ. (2010) 'Quantum non-demolition detection of single microwave photons in a circuit'. NATURE PHYSICS, 6 (9), pp. 663-667.
  • Bishop LS, Ginossar E, Girvin SM. (2010) 'Response of the Strongly Driven Jaynes-Cummings Oscillator'. PHYSICAL REVIEW LETTERS, 105 (10) Article number ARTN 100505
  • Ginossar E, Bishop LS, Schuster DI, Girvin SM. (2010) 'Protocol for high-fidelity readout in the photon-blockade regime of circuit QED'. PHYSICAL REVIEW A, 82 (2) Article number ARTN 022335
  • Ginossar E, Glazman LI, Ojanen T, von Oppen F, Shanks WE, Bleszynski-Jayich AC, Harris JGE. (2010) 'Mesoscopic persistent currents in a strong magnetic field'. PHYSICAL REVIEW B, 81 (15) Article number ARTN 155448
  • Bleszynski-Jayich AC, Shanks WE, Peaudecerf B, Ginossar E, von Oppen F, Glazman L, Harris JGE. (2009) 'Persistent Currents in Normal Metal Rings'. SCIENCE, 326 (5950), pp. 272-275.
  • Bishop LS, Tornberg L, Price D, Ginossar E, Nunnenkamp A, Houck AA, Gambetta JM, Koch J, Johansson G, Girvin SM, Schoelkopf RJ. (2009) 'Proposal for generating and detecting multi-qubit GHZ states in circuit QED'. NEW JOURNAL OF PHYSICS, 11 Article number ARTN 073040
  • Ginossar E, Levinson Y, Levit S. (2008) 'Coherent optical control of correlation waves of spins in semiconductors'. PHYSICAL REVIEW B, 78 (20) Article number ARTN 205204
  • Neder I, Ginossar E. (2008) 'Behavior of electronic interferometers in the nonlinear regime'. PHYSICAL REVIEW LETTERS, 100 (19) Article number ARTN 196806
  • Ginossar E, Levinson Y, Levit S. (2008) 'Optical manipulation of collective spin correlations in semiconductors with a squeezed vacuum of polarized photons'. PHYSICAL REVIEW B, 77 (3) Article number ARTN 035307
  • Rabinak I, Ginossar E, Levit S. (2007) 'Atom in a coherently controlled squeezed vacuum'. PHYSICAL REVIEW A, 76 (1) Article number ARTN 013821
  • Ginossar E, Levit S. (2005) 'Semiconductor Microstructure in a Squeezed Vacuum: Electron-Hole Plasma Luminescence'. Physical Review B (Condensed Matter and Materials Physics), 72 (7) Article number 075333

    Abstract

    We consider a semiconductor quantum-well placed in a wave guide microcavity and interacting with the broadband squeezed vacuum radiation, which fills one mode of the wave guide with a large average occupation. The wave guide modifies the optical density of states so that the quantum well interacts mostly with the squeezed vacuum. The vacuum is squeezed around the externally controlled central frequency $\om_0$, which is tuned above the electron-hole gap $E_g$, and induces fluctuations in the interband polarization of the quantum-well. The power spectrum of scattered light exhibits a peak around $\om_0$, which is moreover non-Lorentzian and is a result of both the squeezing and the particle-hole continuum. The squeezing spectrum is qualitatively different from the atomic case. We discuss the possibility to observe the above phenomena in the presence of additional non-radiative (e-e, phonon) dephasing.

Book chapters

  • Ginossar E, Bishop LS, Girvin SM. (2012) 'Nonlinear oscillators and high fidelity qubit state measurement in circuit quantum electrodynamics'. in (ed.) Fluctuating Nonlinear Oscillators. From nanomechanics to quantum superconducting circuits Oxford University Press Article number 8

    Abstract

    In this book chapter we analyze the high excitation nonlinear response of the Jaynes-Cummings model in quantum optics when the qubit and cavity are strongly coupled. We focus on the parameter ranges appropriate for transmon qubits in the circuit quantum electrodynamics architecture, where the system behaves essentially as a nonlinear quantum oscillator and we analyze the quantum and semi-classical dynamics. One of the central motivations is that under strong excitation tones, the nonlinear response can lead to qubit quantum state discrimination and we present initial results for the cases when the qubit and cavity are on resonance or far off-resonance (dispersive).

Internet publications

  • Belinicher V, Ginossar E, Levit S. (2001) Universal Features of Interacting Chaotic Quantum Dots. Application to Statistics of Coulomb Blockade Peak Spacings.

    Abstract

    We present a complete classification of the electron-electron interaction in chaotic quantum dots based on expansion in inverse powers of $1/M$, the number of the electron states in the Thouless window, $M \simeq k_F R$. This classification is quite universal and extends and enlarges the universal non interacting RMT statistical ensembles. We show that existing Coulomb blockade peak spacing data for $B=0$ and $B\ne 0$ is described quite accurately by the interacting GSE and by its extension to $B\ne 0$. The bimodal structure existing in the interacting GUE case is completely washed out by the combined effect of the spin orbit, pairing and higher order residual interactions.

Teaching

Level 1 Essential Mathematics

Advanced Quantum Physics

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