Experimental realization of the simulation of Deutsch's algorithm using Mach-Zehnder interferometer

Abstract We present in this work the experimental realization of the simulation of Deutsch's algorithm using a Mach-Zehnder interferometer setup, as previously proposed by Cabral and coauthors [20]. Our setup allows the simultaneous entrance of two qbits, as in Deutsch's circuit. The results showed a limitation of this interpretation. The Mach-Zehnder interferometer simulates output results of Deutsch's circuit due to the control of phase difference between the arms of the interferometer, independently of the second qbit. Although our experiment was realized using a intense beam, we showed the concordance of our results with the expected results for unique photons. Our results agree with many works that use intense beams to explore the fundamentals of quantum information and quantum computation. It is an interesting scenario to discuss and teach fundamental aspects of quantum mechanics.