Generation of continuous variable entangled light Department of Physics Dalian University of Technology Dalian, 116024, the People's Republic of China.

Slides:



Advertisements
Similar presentations
Strong Monogamy and Genuine Multipartite Entanglement Gerardo Adesso Informal Quantum Information Gathering 2007 The Gaussian Case Quantum Theory group.
Advertisements

APRIL 2010 AARHUS UNIVERSITY Simulation of probed quantum many body systems.
Biexciton-Exciton Cascades in Graphene Quantum Dots CAP 2014, Sudbury Isil Ozfidan I.Ozfidan, M. Korkusinski,A.D.Guclu,J.McGuire and P.Hawrylak, PRB89,
Emergent Majorana Fermion in Cavity QED Lattice
Shanhui Fan, Shanshan Xu, Eden Rephaeli
Entanglement of Movable Mirrors in a Correlated Emission Laser
1 Multiphoton Entanglement Eli Megidish Quantum Optics Seminar,2010.
The quantum signature of chaos through the dynamics of entanglement in classically regular and chaotic systems Lock Yue Chew and Ning Ning Chung Division.
Quantum Feedback Control of Entanglement in collaboration with H. M. Wiseman, Griffith University, Brisbane AU University of Camerino, Italy Stefano Mancini.
Network Synthesis of Linear Dynamical Quantum Stochastic Systems Hendra Nurdin (ANU) Matthew James (ANU) Andrew Doherty (U. Queensland) TexPoint fonts.
Technion – Israel Institute of Technology, Physics Department and Solid State Institute Entangled Photon Pairs from Semiconductor Quantum Dots Nikolay.
Quantum Entanglement of Rb Atoms Using Cold Collisions ( 韓殿君 ) Dian-Jiun Han Physics Department Chung Cheng University.
Universal Optical Operations in Quantum Information Processing Wei-Min Zhang ( Physics Dept, NCKU )
Characterization and optimization of entangled states produced by a self-phase-locked OPO J. Laurat, G. Keller, J.A.O. Huguenin T. Coudreau, N. Treps,
Niels Bohr Institute Copenhagen University Eugene PolzikLECTURE 5.
Quantum Dynamics of a Kicked Harmonic Oscillator Laura Ingalls Huntley Prof. Calvin Stubbins Franklin & Marshall College Department of Physics & Astronomy.
Deterministic teleportation of electrons in a quantum dot nanostructure Deics III, 28 February 2006 Richard de Visser David DiVincenzo (IBM, Yorktown Heights)
Transfer of entanglement from a Gaussian field to remote qubits Myungshik Kim Queen’s University, Belfast UniMilano 14 December 2004.
Carrier Wave Rabi Flopping (CWRF) Presentation by Nathan Hart Conditions for CWRF: 1.There must exist a one photon resonance with the ground state 2.The.
PG lectures Spontaneous emission. Outline Lectures 1-2 Introduction What is it? Why does it happen? Deriving the A coefficient. Full quantum description.
Single atom lasing of a dressed flux qubit
Dressed state amplification by a superconducting qubit E. Il‘ichev, Outline Introduction: Qubit-resonator system Parametric amplification Quantum amplifier.
TeV Particle Astrophysics August 2006 Caltech Australian National University Universitat Hannover/AEI LIGO Scientific Collaboration MIT Corbitt, Goda,
Witnesses for quantum information resources Archan S. Majumdar S. N. Bose National Centre for Basic Sciences, Kolkata, India Collaborators: S. Adhikari,
Fundamental gravitational limitations to quantum computing Rafael A. Porto (Carnegie Mellon U. & University of the Republic, Uruguay.) In collaboration.
Manipulating Continuous Variable Photonic Entanglement Martin Plenio Imperial College London Institute for Mathematical Sciences & Department of Physics.
Chang-Kui Duan, Institute of Modern Physics, CUPT 1 Harmonic oscillator and coherent states Reading materials: 1.Chapter 7 of Shankar’s PQM.
Generation of Mesoscopic Superpositions of Two Squeezed States of Motion for A Trapped Ion Shih-Chuan Gou ( 郭西川 ) Department of Physics National Changhua.
Motivation and goals One particle, two particles: previous work Three particles: flow through particles Many particles: flow along networks Application:
Purdue University Spring 2014 Prof. Yong P. Chen Lecture 5 (2/3/2014) Slide Introduction to Quantum Optics &
A deterministic source of entangled photons David Vitali, Giacomo Ciaramicoli, and Paolo Tombesi Dip. di Matematica e Fisica and Unità INFM, Università.
Christine Muschik and J. Ignacio Cirac Entanglement generated by Dissipation Max-Planck-Institut für Quantenoptik Hanna Krauter, Kasper Jensen, Jonas Meyer.
Witnessing Quantum Coherence IWQSE 2013, NTU Oct. 15 (2013) Yueh-Nan Chen ( 陳岳男 ) Dep. of Physics, NCKU National Center for Theoretical Sciences (South)
Quantum Computers, Algorithms and Chaos - Varenna 2005 ENTANGLEMENT IN QUANTUM OPTICS Paolo Tombesi Department of Physics University of Camerino.
Wave Packet Echo in Optical Lattice and Decoherence Time Chao Zhuang U(t) Aug. 15, 2006 CQISC2006 University of Toronto.
Multi-Partite Squeezing and SU (1,1) Symmetry Zahra Shaterzadeh Yazdi Institute for Quantum Information Science, University of Calgary with Peter S. Turner.
Quantum Dense coding and Quantum Teleportation
LONG-LIVED QUANTUM MEMORY USING NUCLEAR SPINS A. Sinatra, G. Reinaudi, F. Laloë (ENS, Paris) Laboratoire Kastler Brossel A. Dantan, E. Giacobino, M. Pinard.
H ij Entangle- ment flow multipartite systems [1] Numerically computed times assuming saturated rate equations, along with the lower bound (solid line)
Entanglement for two qubits interacting with a thermal field Mikhail Mastyugin The XXII International Workshop High Energy Physics and Quantum Field Theory.
Semilinear Response Michael Wilkinson (Open University), Bernhard Mehlig (Gothenburg University), Doron Cohen (Ben Gurion University) A newly discovered.
Copenhagen interpretation Entanglement - qubits 2 quantum coins 2 spins ( spin “up” or spin “down”) Entangled state many qubits: Entangled state:
Quantum Entanglement and Distillation in Information Processing Shao-Ming Fei
Multiparticle Entangled States of the W- class, their Properties and Applications A. Rodichkina, A. Basharov, V. Gorbachev Laboratory for Quantum Information.
Pablo Barberis Blostein y Marc Bienert
IEN-Galileo Ferraris - Torino - 16 Febbraio 2006 Scheme for Entangling Micromeccanical Resonators by Entanglement Swapping Paolo Tombesi Stefano Mancini.
For long wavelength, compared to the size of the atom The term containing A 2 in the dipole approximation does not involve atomic operators, consequently.
Non classical correlations of two interacting qubits coupled to independent reservoirs R. Migliore CNR-INFM, Research Unit CNISM of Palermo Dipartimento.
Quantum Imaging MURI Kick-Off Meeting Rochester, June 9-10, Entangled state and thermal light - Foundamental and applications.
Quantum Optics VI Krynica Unconditional quantum cloning of coherent states with linear optics Gerd Leuchs, Vincent Josse, Ulrik L. Andersen Institut.
Quantum Theory of the Coherently Pumped Micromaser István Németh and János Bergou University of West Hungary Department of Physics CEWQO 2008 Belgrade,
Carmen Porto Supervisor: Prof. Simone Cialdi Co-Supervisor: Prof. Matteo Paris PhD school of Physics.
Multi-photon Absorption Rates for N00N States William Plick, Christoph F. Wildfeuer, Jonathan P. Dowling: Hearne Institute for Theoretical Physics, LSU.
Entanglement Detection Gühne & Tóth, Physics Reports 474 (2009). Superradiance: … Theory of Collective Spontaneous Emission Gross & Haroche, Physics Reports.
Delayed-choice Experiment in Cavity QED Rameez-ul-Islam National Institute of Lasers and Optronics, Islamabad.
International Scientific Spring 2016
Spontaneous Parametric Down Conversion and The Biphoton
ISTITUTO NAZIONALE DI RICERCA METROLOGICA Exploiting hidden correlations: the illusionist game Alice Meda Marco Genovese.
Yakup Boran Spring Modern Atomic Physics
Quantum optics Eyal Freiberg.
QUANTUM TRANSITIONS WITHIN THE FUNCTIONAL INTEGRATION REAL FUNCTIONAL
Quantum Phase Transition of Light: A Renormalization Group Study
Scheme for Entangling Micromeccanical Resonators
Implementation of All-Optical Toffoli gate in Λ- systems
Quantum Information with Continuous Variables
Quantum entanglement measures and detection
The Grand Unified Theory of Quantum Metrology
Quantum computation using two component Bose-Einstein condensates
郑 公 平 河南师范大学 第五届全国冷原子物理和量子信息青年学者学术讨论会
Jaynes-Cummings Hamiltonian
Presentation transcript:

Generation of continuous variable entangled light Department of Physics Dalian University of Technology Dalian, , the People's Republic of China

Outline 4 5 Introduction of continuous variable (CV) entanglement 1 Recent works 2 Our scheme of generation CV entangled lights 3 Conclusion 4

1.Introduction of CV entanglement infinite 2N CV system Spin N system Spin 1 system Spin ½ system |0> and |1> |-1>, |0> and |1> |-N>… |0> …|N> |0>,|1>,|2>,|3>…… Dimension of the Hilbert Space

1.Introduction of CV entanglement Continuous variable entanglement brings many applications such as, CV Quantum computation Quantum teleportation Error correction Quantum cloning Quantum optics Quantum cryptography 1.Samuel L. Braunstein et al. Review of Modern Physics, 77, 513(2005) 连续变量的量子信息处理 与非定域性 逯怀新,郁司夏,杨洁,陈增兵,张永 德 《量子力学新进展》(第三辑)

2.Recent work Bouwmeester, D. et al. Nature 390, 575–579 (1997). Xiong H, Scully M O, and Zubairy M S Phys. Rev. Lett. 94,

2.Recent work Kiffner M, Zubairy M S, Evers J, Keitel C H Phys. Rev. A Alebachew E Phys.Rev. A (2007)

2.Recent work Zhou L, Xiong H, and Zubairy M S Phys. Rev. A (2006) Cassemiro K N and Villar A S Phys. Rev. A (2008)

3.1 Our Scheme on generation three- mode entangled light This is our scheme of generation multimode entangled lights. Three cavity modes resonantly interact with atomic transitions |a>↔|b>, |b>↔|c>, and |c>↔|d> with coupling constants g 1, g 2, and g 3, respectively. Two classical fields drive the atomic level resonantly between|a>↔|c> and |b>↔|d> with Rabi frequencies Ω ac and Ω bd

2 ◆ Quantum Computation over Continuous Variables Seth Lloyd et al. Phys. Rev. Lett. 82, 1784 (1999) Applications of multimode entanglement: Why multimode 3 ◆ Secret sharing Tripartite Quantum State Sharing Andrew M. Lance et al. Phys. Rev. Lett. 92, (2004) 1 ◆ Quantum teleportation based on CVE Multipartite Entanglement for Continuous Variables: A Quantum Teleportation Network P. van Loock et al. Phys. Rev. Lett. 84, 3482

3.1.2 DERIVATION OF THE MASTER EQUATION

3.1.3 Multimode entanglement criterion Duan et al. proposed the summation of the quantum fluctuations It has been often used to measure entanglement between two modes. (Duan L M, Giedke G,Cirac J I,Zoller P Phys. Rev. Lett ) Recently, other criteria are employed to test entanglement in many models. (Phys. Rev. A 77, )

Multimode entanglement criterion However, we need a criterion to test n-mode entanglement. Here, we employ the PPT (positivity of partial transpose) criterion Consider n-mode Gaussian states with annihilation and creation operators a j and a † j with Define a covariance matrix, It must satisfy Robertson-Schrödinger uncertainty principle Phys. Rev. 46, 794 (1934)

Multimode entanglement criterion partial transpose If the transposed part can be separated from the other parts, then, It indicates that all the eigenvalues ofare bigger than 1

Multimode entanglement criterion To calculate the smallest eigenvalue, we rewrite the covariance matrix V in term of. Then, all the elements of the variance matrix are composed of a series of mean values, Using the relation We can get all of these eigenvalues, then we can test the entanglement.

Numerical results For all the three modes, the smallest eigenvalue is smaller than 1, it will be a sufficient evidence for the existence of the quantum entanglement between the transposed mode and the other modes.

Numerical results We assume that the atoms in state are injected into the cavity with rate r a. The following picture shows the entanglement and the photon number various with

Numerical results The effect of two classical driven field

Entanglement generation in double-Λsystem Scully and Zubairy, Phys. Rev. A , 1987

Entanglement generation in double-Λsystem Traditional method of generating CVE -- Parametric down conversion Cascade configuration -- Creating and annihilating a photon in two modes at the same time Our scheme -- Annihilating a photon in one mode and creating one in another mode, similar with “quantum beat”

Entanglement generation in double-Λsystem

Following the standard procedure in laser theory developed by Scully and Zubairy, we get the master equation Unless cascade configuration, our scheme is similar with “quantum beat” leaser (Scully and Zubairy, Phys. Rev. A , 1987) It contains Recently, they investigate the entanglement in quantum beat. (Phys. Rev. A 77, )

Cascade VS Double- Λ In cascade model, both of the two modes will be created or annihilated one photon in one loop. So, it contains the term Annihilating a photon in one mode and creating one in another mode, similar with “quantum beat”

Entanglement criterion Although the criterion- the sum of the quantum fluctuations was widely used in our previous work, this criterion can not be applied to measure some special coherent state. Here is an example given by E. Shchukin and W. Vogel in PRL 95, (2005) According to their results, the sum of the quantum fluctuations “fail to demonstrate the entanglement of this state”. We also find that this criterion is not suitable for measure entanglement in V type configuration.

Entanglement criterion We recall that the criterion proposed by Hillery and Zubairy which can be used for non- Gaussionian state The criterion say if the two-mode field is entangled. Here is an example With these equations, we can calculate

Numerical results The quantum fields are in ”V” form. If the photon number in two mode only oscillate because of the symmetry.

Numerical results Effect of classical field on entanglement With the increasing of the classical field, the entangled time will be shorten.

Numerical results Effect of classical field on photon numbers With the increasing of the classical field, the photon numbers will be amplified more quickly.

Numerical results Effect of classical field on overcoming the cavity loss With a large cavity loss we can get entanglement with a stronger classical field. But at the same time, the time entanglement exist will be shorten.

Conclusion 1 We generate three- mode entanglement by using the interaction of atom and cavity field 2 In our scheme we need an pure initial state of the atom rather than a mixed state. That will be more easier to realize in experiment. 3 Our scheme can be extend to multimode by using multi- level atoms.

Our study is helpful in understanding the entanglement characteristic when the master equation contains such as quantum beats laser and Hanle e ff ect laser system. Di ff erent from similar NPD, the scheme is another way to produce CVE. Conclusion Our scheme We derive the theory of this system and analyze the available entanglement criterion for double-Λ system. When the atoms are injected in the ground state |d>, the entangled laser can be achieved under the condition of suitable parameters.