Demonstration of local teleportation using classical entanglement

Abstract

Teleportation describes the transmission of information without transport of neither matter nor energy. For many years, however, it has been implicitly assumed that this scheme is of inherently nonlocal nature, and therefore exclusive to quantum systems. Here, we experimentally demonstrate that the concept of teleportation can be readily generalized beyond the quantum realm. We present an optical implementation of the teleportation protocol solely based on classical entanglement between spatial and modal degrees of freedom, entirely independent of nonlocality. Our findings could enable novel methods for distributing information between different transmission channels and may provide the means to leverage the advantages of both quantum and classical systems to create a robust hybrid communication infrastructure

Orbital-angular-momentum mixing in type-II second-harmonic generation

“…we arrive at an effective three-mode coupling, governed by the same rescaled dynamical equations (19). Therefore, the orbital angular momentum mixing of counter rotating vortices gives rise to a superposition of radial modes, locked in phase and amplitude as determined by Eq.…”

“…Many works have been devoted to schemes for implementing and applying this spin-orbit coupling [2][3][4][5][6][7][8][9][10][11]. Beyond the intrinsic beauty of this subject, one may find interesting applications to quantum information tasks like optical communication [12,13], teleportation schemes [14][15][16][17][18][19][20], alignment free quantum cryptography [21][22][23], controlled gates for quantum computation [24,25], quantum simulations [26,27] and metrology [28][29][30]. Quite curiously, the presence of spin-orbit structures in an optical beam can be characterized by inequality criteria similar to those used to witness entanglement in quantum mechanics [31][32][33][34][35][36][37].…”

Spin–orbit laser mode transfer via a classical analogue of quantum teleportation

“…A demonstration of a protocol similar to the one implemented by us has been independently reported in Ref. [40].…”

Direct characterization of coherence of quantum detectors by sequential measurements

“…The quantum properties of quantum measurements have been widely regarded as an essential resource for the preparation of quantum states, [1][2][3] achieving the advantages of quantum technologies, [4][5][6][7] as well as the study of fundamental quantum theories. [8][9][10][11][12][13][14][15] The time-reversal approach allows for the investigation of the properties of quantum measurements qualitatively from the perspective of quantum states. [16][17][18] In addition, the quantum resource theories for quantification of quantum properties of quantum measurements have been developed very recently [19][20][21][22] and have been applied to investigate coherence of quantumoptical detectors.…”