Simulating the quantum switch with quantum circuits is computationally hard
Sign Up to like & getrecommendations! Published in 2024 at "Nature Communications"
DOI: 10.1038/s41467-025-64996-6
Abstract: Higher-order transformations acting on input quantum channels in an indefinite causal order—such as the quantum switch—cannot be described by quantum circuits using the same number of calls to the input channels. A natural question is… read more here.
Keywords: quantum circuits; quantum switch; indefinite causal; quantum ... See more keywords
Analysis of a multiple-quantum-dots embedded ring structure for potential optically-controlled quantum switch or spin filter
Sign Up to like & getrecommendations! Published in 2020 at "Scientific Reports"
DOI: 10.1038/s41598-020-73275-x
Abstract: We theoretically study the average current through a ring embedded with multiple quantum dots in each arm subjected to a time-dependent external field. A current resonance band can be observed in a six-quantum-dot system. In… read more here.
Keywords: quantum; controlled quantum; multiple quantum; quantum switch ... See more keywords
Demonstration of superior communication through thermodynamically free channels in an optical quantum switch
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review A"
DOI: 10.1103/physreva.110.032422
Abstract: The release of causal structure of physical events from a well-defined order to an indefinite one stimulates remarkable enhancements in various quantum information tasks. Some of these advantages, however, are questioned for the ambiguous role… read more here.
Keywords: information; quantum switch; causal; switch ... See more keywords
Thermodynamics of Quantum Switch Information Capacity Activation.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.230604
Abstract: We address a new setting where the second law is under question: thermalizations in a quantum superposition of causal orders, enacted by the so-called quantum switch. This superposition has been shown to be associated with… read more here.
Keywords: increase; capacity; thermodynamics; information capacity ... See more keywords
Measuring incompatibility and clustering quantum observables with a quantum switch
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.130.170201
Abstract: The existence of incompatible observables is a cornerstone of quantum mechanics and a valuable resource in quantum technologies. Here we introduce a measure of incompatibility, called the mutual eigenspace disturbance (MED), which quantifies the amount… read more here.
Keywords: quantum observables; incompatibility; measuring incompatibility; clustering quantum ... See more keywords
Experimental Validation of Enhanced Information Capacity by Quantum Switch in Accordance with Thermodynamic Laws.
Sign Up to like & getrecommendations! Published in 2024 at "Physical review letters"
DOI: 10.1103/physrevlett.133.040401
Abstract: We experimentally probe the interplay of the quantum switch with the laws of thermodynamics. The quantum switch places two channels in a superposition of orders and may be applied to thermalizing channels. Quantum-switching thermal channels… read more here.
Keywords: information; thermodynamics; capacity; quantum switch ... See more keywords
Quantum Switch for the Quantum Internet: Noiseless Communications Through Noisy Channels
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Journal on Selected Areas in Communications"
DOI: 10.1109/jsac.2020.2969035
Abstract: Counter-intuitively, quantum mechanics enables quantum particles to propagate simultaneously among multiple space-time trajectories. Hence, a quantum information carrier can travel through different communication channels in a quantum superposition of different orders, so that the relative… read more here.
Keywords: communication; quantum switch; quantum; switch quantum ... See more keywords