Experimental verification of Threshold Quantum State Tomography on a fully-reconfigurable photonic integrated circuit
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866916676362043392 |
|---|---|
| author | Caruccio, Eugenio Maragnano, Diego Rodari, Giovanni Picus, Davide Garberoglio, Giovanni Binosi, Daniele Albiero, Riccardo Di Giano, Niki Ceccarelli, Francesco Corrielli, Giacomo Spagnolo, Nicolò Osellame, Roberto Dapor, Maurizio Liscidini, Marco Sciarrino, Fabio |
| author_facet | Caruccio, Eugenio Maragnano, Diego Rodari, Giovanni Picus, Davide Garberoglio, Giovanni Binosi, Daniele Albiero, Riccardo Di Giano, Niki Ceccarelli, Francesco Corrielli, Giacomo Spagnolo, Nicolò Osellame, Roberto Dapor, Maurizio Liscidini, Marco Sciarrino, Fabio |
| contents | Reconstructing the state of a complex quantum system represents a pivotal task for all quantum information applications, both for characterization purposes and for verification of quantum protocols. Recent technological developments have shown the capability of building quantum systems with progressively larger number of qubits in different platforms. The standard approach based on quantum state tomography, while providing a method to completely characterize an unknown quantum state, requires a number of measurements that scales exponentially with the number of qubits. Other methods have been subsequently proposed and tested to reduce the number of measurements, or to focus on specific properties of the output state rather than on its complete reconstruction. Here, we show experimentally the application of an approach, called threshold quantum state tomography, in an advanced hybrid photonic platform with states up to n=4 qubits. This method does not require a priori knowledge on the state, and selects only the informative projectors starting from the measurement of the density matrix diagonal. We show the effectiveness of this approach in a photonic platform, showing that a consistent reduction in the number of measurement is obtained while reconstructing relevant states for quantum protocols, with only very limited loss of information. The advantage of this protocol opens perspective of its application in larger, more complex, systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_05079 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Experimental verification of Threshold Quantum State Tomography on a fully-reconfigurable photonic integrated circuit Caruccio, Eugenio Maragnano, Diego Rodari, Giovanni Picus, Davide Garberoglio, Giovanni Binosi, Daniele Albiero, Riccardo Di Giano, Niki Ceccarelli, Francesco Corrielli, Giacomo Spagnolo, Nicolò Osellame, Roberto Dapor, Maurizio Liscidini, Marco Sciarrino, Fabio Quantum Physics Reconstructing the state of a complex quantum system represents a pivotal task for all quantum information applications, both for characterization purposes and for verification of quantum protocols. Recent technological developments have shown the capability of building quantum systems with progressively larger number of qubits in different platforms. The standard approach based on quantum state tomography, while providing a method to completely characterize an unknown quantum state, requires a number of measurements that scales exponentially with the number of qubits. Other methods have been subsequently proposed and tested to reduce the number of measurements, or to focus on specific properties of the output state rather than on its complete reconstruction. Here, we show experimentally the application of an approach, called threshold quantum state tomography, in an advanced hybrid photonic platform with states up to n=4 qubits. This method does not require a priori knowledge on the state, and selects only the informative projectors starting from the measurement of the density matrix diagonal. We show the effectiveness of this approach in a photonic platform, showing that a consistent reduction in the number of measurement is obtained while reconstructing relevant states for quantum protocols, with only very limited loss of information. The advantage of this protocol opens perspective of its application in larger, more complex, systems. |
| title | Experimental verification of Threshold Quantum State Tomography on a fully-reconfigurable photonic integrated circuit |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2504.05079 |