Abstract
We experimentally demonstrate a gain-tunable entangling gate for optical continuous-variable one-way quantum computation, where a three-mode linear Gaussian cluster state is utilized as a resource state. Our gate has the ability of on-off switching of two-mode interactions, as well as interaction-gain tuning. The control of operation is perfectly achieved by adjusting the relative phase in a homodyne detection, which represents the feature of one-way quantum computation: the selection of measurement basis determines the quantum operations. Entanglement at the output for each operation is verified by acquiring the PT symplectic eigenvalue and logarithmic negativity \(E_N\). The measurement results of \(E_N\) range from \(E_N=0\) for the non-entangling operation, to \(E_N=0.39\pm 0.05\) for the entangling operation with maximum interaction gain. Our gate can be directly incorporated into a large-scale multi-mode one-way quantum computation.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
Note that all resource modes are initially in \(p\)-squeezed states. This condition simplifies theoretical discussion of one-way quantum computation.
References
Ukai, R., Iwata, N., Shimokawa, Y., Armstrong, S.C., Politi, A., Yoshikawa, J., van Loock, P., Furusawa, A.: Demonstration of unconditional one-way quantum computations for continuous variables. Phys. Rev. Lett. 106, 240504 (2011)
Ukai, R., Yoshikawa, J., Iwata, N., van Loock, P., Furusawa, A.: Universal linear Bogoliubov transformations through one-way quantum computation. Phys. Rev. A 81, 032315 (2010)
Sparkes, B.M., Chrzanowski, H.M., Parrain, D.P., Buchler, B.C., Lam, P.K., Symul, T.: A scalable, self-analyzing digital locking system for use on quantum optics experiments. Rev. Sci. Instrum. 82, 075113 (2011)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2015 Springer Japan
About this chapter
Cite this chapter
Ukai, R. (2015). Experimental Demonstration of Gain-Tunable Entangling Gate for Continuous Variables. In: Multi-Step Multi-Input One-Way Quantum Information Processing with Spatial and Temporal Modes of Light. Springer Theses. Springer, Tokyo. https://doi.org/10.1007/978-4-431-55019-8_9
Download citation
DOI: https://doi.org/10.1007/978-4-431-55019-8_9
Published:
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-55018-1
Online ISBN: 978-4-431-55019-8
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)