# Continuous-variable quantum cloning of coherent states with phase-conjugate input modes using linear optics

## Abstract

We propose a scheme for continuous-variable quantum cloning of coherent states with phase-conjugate input modes using linear optics. The quantum cloning machine yields M identical optimal clones from N replicas of a coherent state and N replicas of its phase conjugate. This scheme can be straightforwardly implemented with the setups accessible at present since its optical implementation only employs simple linear optical elements and homodyne detection. Compared with the original scheme for continuous-variable quantum cloning with phase-conjugate input modes proposed by Cerf and Iblisdir [Phys. Rev. Lett. 87, 247903 (2001)], which utilized a nondegenerate optical parametric amplifier, our scheme loses the output of phase-conjugate clones and is regarded as irreversible quantum cloning.

- Authors:

- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006 (China)

- Publication Date:

- OSTI Identifier:
- 20982073

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.75.022306; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANNIHILATION OPERATORS; DETECTION; EIGENSTATES; OPTICS; PARAMETRIC AMPLIFIERS; REPLICAS

### Citation Formats

```
Chen, Haixia, and Zhang, Jing.
```*Continuous-variable quantum cloning of coherent states with phase-conjugate input modes using linear optics*. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVA.75.022306.

```
Chen, Haixia, & Zhang, Jing.
```*Continuous-variable quantum cloning of coherent states with phase-conjugate input modes using linear optics*. United States. doi:10.1103/PHYSREVA.75.022306.

```
Chen, Haixia, and Zhang, Jing. Thu .
"Continuous-variable quantum cloning of coherent states with phase-conjugate input modes using linear optics". United States.
doi:10.1103/PHYSREVA.75.022306.
```

```
@article{osti_20982073,
```

title = {Continuous-variable quantum cloning of coherent states with phase-conjugate input modes using linear optics},

author = {Chen, Haixia and Zhang, Jing},

abstractNote = {We propose a scheme for continuous-variable quantum cloning of coherent states with phase-conjugate input modes using linear optics. The quantum cloning machine yields M identical optimal clones from N replicas of a coherent state and N replicas of its phase conjugate. This scheme can be straightforwardly implemented with the setups accessible at present since its optical implementation only employs simple linear optical elements and homodyne detection. Compared with the original scheme for continuous-variable quantum cloning with phase-conjugate input modes proposed by Cerf and Iblisdir [Phys. Rev. Lett. 87, 247903 (2001)], which utilized a nondegenerate optical parametric amplifier, our scheme loses the output of phase-conjugate clones and is regarded as irreversible quantum cloning.},

doi = {10.1103/PHYSREVA.75.022306},

journal = {Physical Review. A},

number = 2,

volume = 75,

place = {United States},

year = {Thu Feb 15 00:00:00 EST 2007},

month = {Thu Feb 15 00:00:00 EST 2007}

}