提出一个基于两个三能级原子和单膜腔场大失谐相互作用来实现两比特量子SWAP门的腔QED方案.在这个方案里,两个全同三能级原子同时与单膜真空腔场发生大失谐相互作用,并辅助了经典场对原子施行单比特操作.此外,在整个作用过程中,腔场态一直处于虚激发,原子和腔场之间没有信息交换,因此对腔的品质要求大大降低.在目前的腔QED技术条件下,该方案是可以实现的.
A scheme is proposed for the realization of quantum SWAP gate in cavity QED. We consider two three-level atoms simultaneously interact with single-mode cavity in the case of large detuning. Moreover, two classical fields are used to perform the rotations on atoms. The operation and implement course are simple and handy. In addition, during the whole course, the cavity is only virtually excited, thus the decoherence time is greatly prolonged and the demand on the quality factor of the cavity is greatly reduced. Within the present cavity QED techniques, the scheme is realizable.
参考文献
| [1] | Preskill J.Realiable quantum computers[J].Proc.R.Soc.Lond.A,1998,454:385-410. |
| [2] | Raimond J M,Brune M,et al.Manipulating quantum entanglement with atoms and photons in a cavity[J].Rev.Mod.Phys.,2001,73:565-582. |
| [3] | Garcia-Ripoll J J,Zoller P,Cirac J I.Speed optimized two-qubit gates with laser coherent control techniques for ion trap quantum computing[J].Phys.Rev.Lett.,2003,91:157901-1-4. |
| [4] | Negrevergne C,Mahesh T S,Ryan C A,et al.Benchmarking quantum control methods on a 12-qubit system[J].Phys.Rev.Lett.,2006,96:170501-1-4. |
| [5] | Knill E,Laflamme R,Milburn G J.A scheme for efficient quantum computation with linear optics[J].Nature,2001,409:46-52. |
| [6] | Sleator T,Weinfurter H.Realizable universal quantum logic gates[J].Phys.Rev.Lett.,1995,74:4087-4090. |
| [7] | Liang L M,Li C Z.Realization of quantum SWAP gate between flying and stationary qubits[J].Phys.Rev.A,2005,72:024303-1-4. |
| [8] | Yang C P,Cun S I.Possible realization of entanglement,logical gates,and quantum-information transfer with superconducting-quantum-interference-device qubits in cavity QED[J].Phys.Rev.A,2003,67:042311-1-8. |
| [9] | Yavuz D D.Single photon SWAP gate using electromagnetically induced transparency[J].Phys.Rev.A,2005,71:053816-1-4. |
| [10] | Zheng S B,Guo G C.Efficient scheme for two-atom entanglement and quantum information processing in cavity QED[J].Phys.Rev.Lett.,2000,85:2392-2395. |
| [11] | Lin X M,Zhou Z W,Xue P,et al.Scheme for implementing quantum dense coding via cavity QED[J].Phys.Lett.A,2003,313:351-355. |
| [12] | Fiorentino M,Kim T,Wong F N C.Single-photon two-qubit SWAP gate for entanglement manipulation[J].Phys.Rev.A,2005,72:012318-1-4. |
| [13] | Song K H,Zhou Z W,Guo G C.Quantum logic gate operation and entanglement with superconducting quantum interference devices in a cavity via a Raman transition[J].Phys.Rev.A,2005,71:052310-1-4. |
| [14] | Yang C P,Chu Shih-I,Han S Y.Simplified realization of two-qubit quantum phase gate with four-level systems in cavity QED[J].Phys.Rev.A,2004,70:044303-1-4. |
| [15] | Yang C P,Han S Y.Arbitrary single-qubit operations without energy relaxation in three-level SQUID qubit[J].Phys.Lett.A,2004,321:273-279. |
| [16] | Zheng S B.Unconventional geometric quantum phase gates with a cavity QED system[J].Phys.Rev.A,2004,70:052320-1-4. |
| [17] | Zheng S B.Quantum logic gates for two atoms with a single resonant interaction[J].Phys.Rev.A,2005,71:062335-1-4. |
| [18] | Xue Z Y,Zhang G,Dong P,et al.Quantum controlled phase gate and cluster states generation via two superconducting quantum interference devices in a cavity[J].Eur.Phys.J.B,2006,52:333-336. |
| [19] | Yi X X,Su X H,You L.A conditional quantum phase gate between two 3-state atoms[J].Phys.Rev.Lett.,2003,90:097902-1-4. |
| [20] | Wang X C,Wang C C,Fang S D.On nonlocal quantum gates[J].Chinese Journal of Quantum Electronics (量子电子学报),2005,22(3):392-395 (in Chinese). |
| [21] | Yang C P,et al.Quantum information transfer and entanglement with SQUID qubits in cavity QED:a dark-state scheme with tolerance for nonuniform device parameter[J].Phys.Rev.Lett.,2004,92:117902-1-4. |
| [22] | Zhang T C,Wang J M,et al.Experimental process of cavity quantum electrodynamics in the optical domain[J].Physics (物理),2003,32(11):751-756 (in Chinese). |
| [23] | Geng T,Li G,Wang J M,et al.Cavity QED and quantum information process[J].Chinese Journal of Quantum Electronics (量子电子学报),2004,21(6):719-724 (in Chinese). |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%