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News Archive


2006

3/29/06  Ultrafast coupling of atomic and photonic qubits:

  • Entanglement between atomic (hyperfine) and photonic (frequency) qubits

  • Theoretical description of scalable quantum networks based on this coupling

  • Precision measurements of excited state lifetimes.

 

1/31/06  Controlled measurements of decoherence in "adjustable-electrode" ion trap


 

1/17/06 Two-dimensional control of individual atomic ions in a "T"-junction ion trap array (turning corners and swapping positions of two ions).

   Manuscript

   Journal Link      

 

 

 

1/3/06 Ions confined within an integrated semiconductor chip:

 

  Manuscript  

  Nature Physics News 

  U-M News Release

                    

 

 

 

 

4/24/06 - Martin Madsen gets his Ph.D.

 

2/3/06 - Louis Deslauriers  defends his Ph.D. thesis.

 

1/31/06 - 2nd TIQC workshop, NIST, Boulder, CO Feb 21-24, 2006

2005

12/9/05 - David Hucul takes top prize in the U-M SPS poster competition for his work on shuttling ions.

 

12/9/05 - Demonstration of entanglement using magnetic-insensitive "clock state" qubits.

 

12/1/05 - Grover's quantum search algorithm demonstrated with four database elements, using two entangled trapped ions. 

U-M News Release.

 

11/15/05 - Patricia Lee defends her Ph.D. thesis

 

10/7/05 - Boris Blinov a finalist for the C. H. Townes Symposium Young Scholars Competition

 

6/11/05 - Two-dimensional control of individual atomic ions in a "T"-junction ion trap array (turning corners, swapping positions).

 

5/17/05 - Manipulation of trapped and laser-cooled atoms with ultrafast laser pulses:

    - paper on precision lifetime measurement

    - paper on broadband laser cooling

2004

 

10/16/2004 - Dr. Paul Haljan gives the Department of Physics's Saturday Morning Physics lectures:

Saturday Morning Physics:

photo by Jens Zorn

Paul Haljan presents three public lectures on quantum mechanics with cold atoms:

(1) Laser Cooling

(2) Quantum Tornadoes

(3) Quantum Computing

 

6/8/04 - Measurements of Bell Inequality Violations with an Entangled Atom and Photon - alternative characterization of entanglement in a hybrid system that may ultimately lead to a "loophole-free" Bell inequality test.

 

4/27/04 - Cooling and Heating of Cadmium Ions at the lowest quantum levels of an rf ion trap

 

3/11/04 -  Probabalistic Atom-Photon Entanglement - First direct observation of entanglement between single atoms and single photons.

Manuscript/News&Views description

2003

9/1/2003 -  Raman transitions using an Electro-optic Modulator are documented and published.  We used a novel technique for frequency doubling all the EOM sidebands.

2002

8/12/02 - New Images

  • Image #6 (Three Ions) | JPEG | GIF | BMP |

  • Image #7 (Three Ions) | JPEG | GIF | BMP |

  • Image #8 (Ions Forming an M-shaped Crystal) | JPEG | GIF | BMP |

6/17/02 - CCD Press Release and Nature Article - Our lab was the subject of a recent press release from the University's news services. The release discusses our lab's long term goal of building an ion trap CCD (or "switch yard") for efficient quantum computing. It also very briefly summarizes an article written by Prof. Monroe and others in the latest issue of Nature.

2/4/02 - MCTP and FOCUS Decoherence Workshop - The Michigan Center for Theoretical Physics (MCTP) and FOCUS are pleased to present a workshop on "Quantum Decoherence."  The workshop will take place between August 21st and 28th on the campus of the University of Michigan in Ann Arbor, MI.    More information is available here.

1/7/02 - New Lab/Paper -  We've moved to a new lab in the sub basement of Randall.  Our new location is SB288 Randall.  Additionally, the Publications section of this website has been updated with a new paper on sympathetic cooling of trapped Cd+ ions. [.PDF, 145Kb]

 

2001

Dec. 2001 - Our group presented its current research to the December FOCUS meeting.  Below are a brief description of the talk and downloadable copy of the accompanying presentation slides:

Trapped ions are perhaps the most attractive system for engineering large-scale entanglement and constructing a quantum computer. Atomic cadmium ions are particularly well-suited for this purpose, and we have made the first steps toward implementing high precision quantum logic gates in cadmium. We have recently demonstrated sympathetic cooling between two different cadmium isotopes, which may prove useful for quenching motional decoherence. More information is available in this paper.

[Slides in .PDF format]

Oct. 2001 - As part of the FOCUS Center's inaugural conference, members of our group presented a poster on proposed research entitled "Strong Field Control of Trapped Ions: Quantum Surfing and Fast Quantum Logic."  The poster is now available online. [.PDF, 59.6Kb]

6/28/01

  • Image #3 (Two Ions) | JPEG | GIF | BMP |

  • Image #4 (Single Ion) | JPEG | GIF | BMP |

  • Image #5 (Two Ions) | JPEG | GIF | BMP |

6/25/01 -  Ions! - Updated 8/12/02 The following are pictures of ion trapped by the group (acquired using a Quantar PMT camera):

  • Image #1 (Single Ion) | JPEG | GIF | BMP |

  • Image #2 (Single Ion) | JPEG | GIF | BMP |