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Exchange-Free Computation on an Unknown Qubit at a Distance
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Exchange-Free Computation on an Unknown Qubit at a Distance
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We present a way of directly manipulating an arbitrary qubit, without the exchange of any particles. This includes as an application the exchange-free preparation of an arbitrary quantum state at Alice by a remote classical Bob. As a result, we are able to propose a protocol that allows one party to directly enact, by means of a suitable program, any computation exchange-free on a remote second party's unknown qubit. Further, we show how to use this for the exchange-free control of a universal two-qubit gate, thus opening the possibility of directly enacting any desired algorithm remotely on a programmable quantum circuit.
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Cited by 1 Pith paper
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Interaction-free measurement of multiple objects using a universal integrated photonic processor
Experimental sequential interaction-free measurements of up to five objects with one photon on an integrated photonic processor confirm theoretical predictions after error mitigation.
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